The process by which molecules such as oxygen are moved into cells along their concentration gradient directly through the cell membrane is called

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Answer 1
molecules move down their concentration gradient through the lipid bilayer with no assistance from transport proteins by means of simple diffusion, a form of passive transport. 

Related Questions

Which structure connects the knee joint at both sides and prevents its dislocation?

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Collateral ligaments are two strap-like ligaments that act to stabilize the hinge motion of the knee, preventing any lateral or medial movement. It is the structure that connects the knee joint at both sides and prevents its dislocation. There are two types: Tibial (medial) collateral ligament and Fibular (lateral) collateral ligament.

Dangerously high body temperatures occur sometimes in the elderly due to

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1) Decreased blood supply to the dermis
2) Decreased sweat gland activity

How has our understanding of membrane permeability changed since the discovery of aquaporins?

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Aquaporins are also called water channels, and they are proteins on the cell's membrane that allow water transport of water between cells. Although the membrane may have hydrophobic properties, it can allow large amounts of water to pass through such a membrane at a fast rate because of the aquaporins. 

The plasma membrane is _____ which means it permits the passage of only certain molecules into and out of the cell, and blocks the passage of some substance altogether

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i believe the answer your looking for is lipid 

A group of scientists examined a meteorite from Mars and found a carbon-rich substance that is produced when microorganisms decay. They concluded that the meteorite provided evidence there was once life on Mars. Why is this an emerging idea?

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Other scientists disagree about the origin of the carbon-rich substance.

The scientists only studied one meteorite

Convection heat loss reduces body temperature by way of:

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Transferring heat by moving cooler air over the body

In humans, the maintenance of a stable internal temperature is a direct result of

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Final answer:

The maintenance of a stable internal temperature in humans is the result of homeostasis, which involves various thermoregulation mechanisms like shivering to produce heat in the cold and sweating to cool down in heat.

Explanation:

In humans, the maintenance of a stable internal temperature is a direct result of a process called homeostasis. This essential function helps to keep the body's internal environment stable despite the changes in external conditions. Homeostasis doesn't only apply to temperature regulation; it also includes the management of pH levels, glucose concentration in the blood, and other vital variables that need to be maintained within narrow ranges to ensure the proper functioning of the body's cells.

The human body employs various mechanisms to maintain homeostasis and regulate body temperature, a process known as thermoregulation. For example, when exposed to cold temperatures, the body will begin to shiver to generate heat and maintain a stable internal temperature. Similarly, during high temperatures, the body can initiate sweating to help cool down. These responses are part of the body's complex system of checks and balances to ensure that optimal conditions for cellular function are preserved.

One way a 50-year-old individual can help maintain lean body mass and minimize increases in body fat is to

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engage and exercise including strength training

In which of the following ways are tRNA and mRNA different?

a. The mRNA repairs mistakes in the DNA while tRNA repairs proteins.
b. Only tRNA bends into a shape that can carry specific amino acids.
c. Only tRNA can come in contact with the ribosomes in the cytoplasm.
d. The mRNA uses uracil while the tRNA uses thymine in its place.

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The correct option is C.
The tRNA is the only type of RNA that can come in contact with the ribosomes in the cytoplasm. During the translation process of protein synthesis in the cell, the tRNA function by carrying amino acid to the ribosomes and matching the codon in the mRNA with the amino acid it codes for. Thus it acts as a bridge between mRNA and ribosomes.
Final answer:

tRNA and mRNA differ in their functions in protein synthesis, where tRNA carries specific amino acids to the ribosome and mRNA carries the codon sequence that dictates the order of amino acids. It is the 3D structure of tRNA that allows it to perform its role; both tRNA and mRNA use uracil, not thymine.

Explanation:

The differences between tRNA (transfer RNA) and mRNA (messenger RNA) are significant in the process of protein synthesis. The correct answer to the question is option b. Only tRNA bends into a specific three-dimensional structure that enables it to carry specific amino acids to the ribosome during protein synthesis. mRNA, on the other hand, is a single-stranded transcript of DNA that carries the genetic code for a protein which is read in sets of three bases called codons, where each codon corresponds to one amino acid.

Moreover, tRNA molecules have anticodons that pair with the codons on the mRNA strand, thus ensuring the insertion of the correct amino acid into the growing polypeptide chain. mRNA does not have amino acid-carrying capacity. Unlike mRNA, tRNA is not involved in carrying the genetic instructions directly from DNA; instead, it plays a crucial role in translating mRNA’s codons into the amino acid sequence of proteins.

It is also important to note that both mRNA and tRNA, like all types of RNA, use uracil instead of thymine. Therefore, the statement in option d, which claims that tRNA uses thymine, is incorrect as thymine is found in DNA, not RNA.

Compare and contrast baby suggs before and after sethe's arrival at 124

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Initially, Baby Suggs was transformed into a kind of holy woman for the black community of Cincinatti. This was when she experienced freedom and realized the meaning of being alive. However, with Sethe's tragedy, Baby Suggs felt broken, and later on, spent her last days bed-ridden and in gloom. 

An iv catheter is to be inserted into a 3-year-old toddler's peripheral vein. as local topical anesthetic is applied, the toddler starts to cry and asks whether the insertion is going to hurt. how should the nurse respond?

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Yes it will hurt, but not for very long

An iv catheter is to be inserted into a 3-year-old toddler's peripheral vein. as local topical anesthetic is applied, the toddler starts to cry and asks whether the insertion is going to hurt. Yes it will hurt, but not for very long

what is catheter ?

Catheter is a sterile instrument used to empty the urine straight from the bladder. The process of removal of urine from the bladder using catheter is called catheterization.

The type of catheter which is left within the body is called the indwelling catheter.

In medical line, these are device that are used for patient for passing out of excretion while on sick bed.

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What anatomical feature of the veins maintains a unidirectional flow of blood back toward the heart?

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One way valves maintain the unidirectional flow.

Which of these is true for a daughter cell produced by mitosis?

A. It functions in the same way as the parent cell.
B. It is unlike any other cell in the organism.
C. It has more cytoplasm than its parent cell had.
D. It is always a haploid cell.

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a. mitosis produces 2 genetically identical diploid daughter cells from one parent cell.
My answer is B I’m not very sure

The cell theory teaches that _____.

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The cell theory teaches that all living things are composed of one or more cells; the cell is the basic unit of life.

Answer: The correct answer for the blank is -

Cell is the basic structural and functional unit of all life forms, all living organisms are composed of basic unit called cells, and each cell arise from a previously existing cell.

Explanation -

The Cell theory was proposed by Schleiden and Schwann in the year 1839, according to which -

1) Cell is considered as the basic structural and functional unit of all life forms.

2) All life forms are made up of cell.

3) Every cell arise from a cell that already existed before.

Which membrane surrounds the others? hints which membrane surrounds the others? perimysium epimysium exomysium endomysium?

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Epimysium

The endomysium is a wispy layer of areolar connective tissue that wraps around each individual muscle fiber or cell. It contains capillaries and nerves and is the deepest and smallest component of the muscular connective tissue. 

The perimysium (or exomysium) is a connective tissue that surrounds groups of muscle fibers called bundles or fascicles. 

The epimysium is a fibrous tissue that envelopes the entire (skeletal) muscle, protecting it from friction against other muscles and bones. It is continuous with the fascia, tendons, and other connective tissues of the muscles such as the endomysium and the perimysium. 

What type of keyboard can help prevent injuries from using the keyboard for long periods of time?

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ERGONOMIC keyboards such as "Microsoft Natural Keyboard" can help prevent injuries from using the keyboard for long periods of time. Posture related injuries result from long use of laptops and computers. The ergonomic keyboards are easily adjustable by adjusting height in a particular angle. 

Which blood test is performed to measure the level of glucose after the patient has not eaten for at least 12 hours?

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a cholesterol blood test

How does a population change as a result of natural selection?

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Within a population, there is variation in the genes for all of the traits that make that species unique. The different forms of each gene are called alleles. ... Nature selects those combinations of alleles that are best able to survive and reproduce under the current ecological conditions
more population more resources being used

Learned helplessness is likely to be accompanied by ________ cortisol levels and ________ blood pressure.

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The given blank can be filled with decreased and decreased.  

Learned helplessness refers to a state in which an individual suffers from a feeling of powerlessness, resulting due to continuous failure to succeed or due to a traumatic event. It is considered to be one of the main causes of depression.  

In the condition, the cortisol levels of an individual get decreased, which eventually results in the reduction of blood pressure.  


Neisseria meningitidis is able to survive inside macrophages and be transported throughout the body in them. neisseria meningitidis is able to survive inside macrophages and be transported throughout the body in them.
a. True
b. False

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a-true .. have a nice day

What of the following statements is true about catalysts?
A. Catalysts slow down the rate of chemical reactions
B. All catalysts are enzymes
C. Catalysts are used up during a chemical reaction
D. Catalysts lower the activation energy of a chemical reaction

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D. Catalysts lower the activation energy of a chemical reaction. 

The fact that is true about the catalyst is that catalysts lower the activation energy of a chemical reaction that is present in Option D. The catalyst that is present in animals, plants, and other biotic individuals is called a "biocatalyst."

What is the biocatalyst?

A catalyst is given to a chemical reaction so that the reaction gets faster and the product is formed from the reactants, but not all reactions need a catalyst. Only the slow reactions need catalysts, but some reactions are naturally fast and don't need them.

In living individuals, the catalysts that are present are called "biocatalysts" because they increase the reaction rate by lowering the activation energy of the substrates. There are lots of enzymes that are required for each and every reaction, such as glycolysis, the Krebs cycle, etc.

Hence ,The fact that is true about the catalyst is that catalysts lower the activation energy of a chemical reaction that is present in Option D.

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Which action is prevented by the cell membrane?

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Action potentials are formed when a stimulus causes the cell membrane and D. the answer
The answer is A. unlimited flow of water into or out of the cell

Which best defines the relationship between speed and velocity? Speed is velocity with displacement. Velocity is speed with displacement. Speed is based on a specific direction. Velocity is based on distance.

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Answer :  Velocity is speed with displacement

Explanation :

The speed of an object is defined as the total distance covered divided by total time taken.

The velocity of an object is defined as the total displacement divided by total time taken.

The speed is a scalar quantity because it has only magnitude while the velocity is a vector quantity i.e. having both magnitude and direction.

The relationship between speed and velocity is " velocity is speed with displacement ".  

Hence, the correct option is (b).

Which combination provides an example of protein complementation?

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Peanut butter sandwich combination provides an example of protein complementation. Whenever legumes like beans, lentils, or peanuts are combined with grains like corn, wheat, or rice, a complete protein is introduced. Peanut butter on whole wheat is a snack that is pretty high in calories and provides a huge amount of all the essential amino acids and lots of healthy fats to boot

Final answer:

Protein complementation occurs when incomplete proteins from different plant sources are combined to provide all essential amino acids, like rice and beans combining grains and legumes to create a complete protein profile.

Explanation:

Protein complementation is the process of combining incomplete proteins from various plant sources to provide all the essential amino acids that the body cannot produce on its own. A classic example of protein complementation is the combination of grains and legumes, such as rice and beans. This combination is effective because grains typically lack the amino acid lysine, while legumes lack methionine and cysteine. By consuming both throughout the day, even if not at the same meal, the body receives a complete amino acid profile similar to that found in complete proteins from animal sources.

The loss of Arctic sea ice has increased over the last several decades. Which of the following is an impact of decreasing sea ice that would reduce biodiversity the most?

A. The ice decreases the length of fishing seasons.
B. The melting ice provides more open land for plant growth.
C. The melting ice means less habitat for some marine species.
D. The oil rigs increase temperatures, resulting in species migrations

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Answer: C. The melting ice means less habitat for some marine species.

Explanation:

The melting of ice of Artic sea ice will lead to the increase in the water levels which will be suitable for the survival of some of the aquatic species like krills, whales and fishes. But the animals which thrive over the frozen ice of Artic sea like penguines, polar bear will not survive.Hence, the diversity of the region will reduce.

Answer: C. The melting ice means less habitat for some marine species

Explanation:

The process of meiosis ensures that organisms will have __________.
a.
a different haploid number than its parents have
b.
different numbers of chromosomes than its parents have
c.
the same diploid number as its parents have
d.
the ability to reproduce by budding

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the answer is c the same diploid number as its parents have

Answer:

c

Explanation:

What is "feminism"? describe how it has evolved in the united states?

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Feminism is a theory that keeps up that ladies and men ought to be equivalent politically, financially, and socially. The ladies' development in the U.S., all things considered, has had three stages. In the main stage, two branches of woman's rights existed – a radical branch that supported the change of all the general public's establishments, and a traditionalist branch that focused on winning the vote in favor of ladies. Amid this initial stage, the traditionalist branch ruled. After the vote was won in 1920, the development started to disintegrate.

Final answer:

Feminism is an ideology that seeks to achieve gender equality and has evolved through several waves in the United States, from the suffrage movement to contemporary feminist activism that addresses a broad spectrum of issues.

Explanation:

What is Feminism?

Feminism is a movement and ideology that advocates for equality between the sexes, aiming to eliminate sexism and promote equal rights in all spheres of life. Originating as féminisme in French, the concept of feminism has significantly evolved over time. It became widespread in the United States throughout the 20th century, aligning with the Women's Movement that fought for suffrage and later expanded to address diverse women's issues.



Evolution of Feminism in the United States

The first wave of feminism was characterized by the women's suffrage movement, with activists like Elizabeth Cady Stanton working towards gaining the right to vote, which was achieved in 1920. The second wave in the 1960s shifted focus to broader issues such as reproductive rights, equal employment, and challenging gender roles. By the 1970s, feminist activism had made inroads into various fields, including the art world, pushing for equality and representation. Despite differences, by the 1980s, advances such as improved employment opportunities and access to health and education were significant feminist achievements.



Modern feminism encompasses a wide range of perspectives, recognizing the diverse experiences of women, including but not limited to women of color, working-class women, disabled women, and those from different sexual orientations and religious backgrounds. This inclusive approach, as argued by feminists like Barbara Smith, seeks to free all women from the constraints of sexism and societal expectations.

Which type of protein, embedded in the plasma membrane, passively allows molecules to move through the membrane?

connecting

carrier

channel

identity and response

Answers

Channel proteins, also known as transport proteins, allow the passage of molecules in and out of the plasma membrane.

All vertebrae possess a body, a spine, and transverse foramina. all vertebrae possess a body, a spine, and transverse foramina.
a. True
b. False

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I think the answer is true

5.   Suppose a dominant allele (N) codes for a big nose and a recessive allele (n) codes for a small nose. Imagine that an organism receives a dominant allele from its mom and a dominant allele from its dad. What can be determined about its genotype and phenotype?

A. The organism has a large nose, because it's homozygous.
  B. The organism has a large nose, because it's heterozygous.
  C. The organism has a small nose, because it's heterozygous.
  D. The organism has a small nose, because it's homozygous.
 

Answers

A. The organism has a large nose, because it's homozygous.

If the organism got from its mom a dominant allele, and from its dad a dominant allele also, the organism will be homozygous dominant. The dominant characteristic is a large nose, therefore the organism will have a large nose as he is homozygous dominant for that trait. If he was heterozygous, he would still have a large nose because it is the dominant trait. To have a small nose, the organism would have to receive from its parents, two recessive alleles.
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Which evidence from the text "Lake Titicaca" by Miguel ngel Asturias supports the inference that Lake Titicaca's waters must have special powers?"Waves of gigantic, seamless mass from the Cretaceous that become, at the height of the American world, the fairest crown of water: Titicaca.""Mineral water. Other American lakes have vegetable waters. The sun knows it. And it is not a heavenly body, but a foundry in the west.""Water in which the armor of the Incan empires conquistadors has not rusted. And it has been entombed already for centuries in its profound vase.""I saw, as the sun was setting, the conquistadors steel shadows sink in search of the city of gold, hidden by the waters of this Andean sweet-lake sea." The set of particular muscles and nerves which control the heart rate is called the Which type of line symmetry does the letter "W" have?horizontaldiagonalverticalnone of the above please please please helpppp!!!!!! "We hold these truths to be self-evident, that all men are created equal...." Which statement BEST explains the underlined portion of the quote from the Declaration of Independence?A)Thomas Jefferson believed all people should be in government.B)Citizens have the same rights as political leaders.C)George Washington did not believe in slavery.D)People are free to have any job they want. Cells have the ability to reproduce by dividing into two identical cells called Which union successfully struck in 1900 Marko can bike at an average speed of 5 3\4 min/mi. He bikes at this speed for 86 1\4 min. How many miles does Marko bike Which of the following is not true of a pseudoscience? (1 point) It does not follow the scientific method. It is not proven reliable through experimentation. It is a practice or belief that claims to be science. It is a science that is controversial or unproven. busses run every 9 minutes starting at 6:00 am. you get to the bus stop at 7:16 am. how long will you wait for the bus Which of the following does NOT need to travel through a solid, a liquid, or a gas? A. Radiation B. Convection C. Conduction mWYX = (4x 8) and mWYZ = 10x. If WYX and WYZ are complementary, find the measure of each angle. With which of these Canterbury Tales characters does Chaucer illustrate a division between religious and scientific thought? A) the Narrator B) the Skipper C) the Doctor D) The Friar I need help pleasssRammy has $9.60 to spend on some peaches and a gallon of milk. Peaches cost $1.20 per pound, and a gallon of milk costs $3.60.The inequality 1.20x + 3.60 9.60 models this situation, where x is the number of pounds of peaches.Solve the inequality. How many pounds of peaches can Rammy buy?A.x 8; Rammy can buy 8 pounds or more of peaches.B.x 5; Rammy can buy 5 pounds or less of peaches.C.x 5; Rammy can buy 5 pounds or more of peaches.D.x 8; Rammy can buy 8 pounds or less of peaches. Which excerpt best identifies Frankenstein as a Gothic novel? A.But these philosophers, whose hands seem only made to dabble in dirt, and their eyes to pore over the microscope or crucible, have indeed performed miracles. B.I perceived that the fallen leaves had disappeared, and that the young buds were shooting forth from the trees that shaded my window. C.The rain pattered dismally against the panes, and my candle was nearly burnt out, when, by the glimmer of the half-extinguished light, I saw the dull yellow eye of the creature open. D.I grasped [Clerval's] hand, and in a moment forgot my horror and misfortune; I felt suddenly, and for the first time during many months, calm and serene joy. You have been called for a 32-year-old female who is in active labor. during your assessment and interview, you note that she is 37 weeks along, this is her first child, and her contractions are 5 minutes apart. she also tells you that her pregnancy is considered high risk. your first concern should be: Twenty-five students go to lunch. Pizza costs $3 and sandwiches cost $2. Twelve students buy pizza. What is the total amount of money spent on sandwiches? F. one die is rolled 3 times. what is the chance of getting no 2's? which of the following three dimensional objects has a rotational symmetry about a line Read the scenario. Two molecules of hydrogen gas and one molecule of oxygen gas react to yield two molecules of water. Which of the following equations properly models the reaction described? H2 + O2 H2O2 H2 + O2 2H2O H + O H2O 2H2 + O2 2H2O What does the passage suggest about Rocco correscas economic situation during his early days in America Steam Workshop Downloader