what is the function of the small intestine?
Answers
The small intestine is responsible for most chemical digestion and the absorption of nutrients. It uses villi and microvilli to greatly increase its surface area, allowing efficient transfer of nutrients into the bloodstream, subsequently heading to the liver for regulation and detoxification.
Explanation:The small intestine is a pivotal organ in the digestive system responsible for the chemical digestion of food and absorption of nutrients. It starts at the stomach and extends to the large intestine, measuring approximately 23 feet in length in adults. The interior of the small intestine features an expansive area created by structural adaptations like circular folds, villi, and microvilli that can compare to the size of a basketball court.
Primarily, the small intestine completes the digestion of proteins, fats, and carbohydrates, facilitated by a variety of enzymes from both the pancreas and the intestine itself. Additionally, villi, which are finger-like projections, and microvilli that sit atop the villi, dramatically increase the surface area available for absorbing nutrients. These villi are essential in transporting the digested nutrients into tiny blood vessels and, subsequently, into the bloodstream. Once in the bloodstream, the nutrients are conveyed through the hepatic portal vein to the liver, where they are regulated and detoxified if necessary.
Related Questions
What part of the respiratory system do you think is most important? Provide a thorough explanation to support your answer.
Answers
Answer:
The most important are the lungs, more precisely the alveoli.
Explanation:
Alveoli are structures of the lungs where gas exchange occurs. They allow oxygen from the air to pass into blood. Oxygen diffuses through the walls of alveoli into the capillaries that surround it. Oxygen is then bonded with the iron in red blood cells and travels to the heart. The heart then sends the oxygenated blood out to all the cells in the body.
At which point in the graph has the population reached carrying capacity?
A.) Point D
B.) point A
C.) point C
D.) point B
Answers
A. Point D
Explanation:
Because I have eyes lol
At point D graph has the population reached carrying capacity.
What is carrying capacity?Another way to think of carrying capacity is as the population size at which the population growth rate is zero. Contrast it with the phrase equilibrium population, which is characterized as a population in which the gene frequencies have achieved equilibrium between mutation pressure and selection pressure.
Carrying capacity in archeology refers to the number and density of prehistoric inhabitants that a particular location could support. In this branch of study, the carrying capacity of an environment is determined by the maximum population for a specific time period.
But historical research shows that the idea that the human population would eventually reach its maximum size is very uncommon. The majority of the time, human population density changes.
Therefore, At point D graph has the population reached carrying capacity.
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The full classification of human beings is as follows: Animalia,
Chordata, Mammalia, Primates, Hominidae, Homo, Homo
Sapiens.
Based on the above, enter the name of the order to which
humans belong.
Answers
Final answer:
Humans belong to the order Primates, within the class Mammalia in biological taxonomy, characterized by advanced traits shared among primates.
Explanation:
In the classification of human beings, humans are categorized under the order Primates. This classification falls within the hierarchy of biological taxonomy and aligns under the class Mammalia. Humans share distinctive primate features such as five digits with nails, opposable thumbs, advanced vision, a large brain, high intelligence, complex behaviors, and the propensity to live in social groups. These traits are shared among primates and are often adaptations to living in trees, although humans have largely moved to a terrestrial lifestyle.
What is a function of a white blood cell
Answers
Answer:
To defend the body against diesease
Explanation:
Answer:
White blood cells protect the body against infection by bacteria and viruses.
Explanation:
White blood cells are part of the immune system that protects your body from infection. These cells circulate through your bloodstream and tissues and respond to injuries and illnesses by attacking unknown organisms that enter your body.
Which elements make up a water molecule?
A).hydrogen and nitrogen
B).oxygen and nitrogen
C).oxygen and carbon
D).hydrogen and oxygen
Answers
Answer:
D). hydrogen and oxygen
Explanation:
A water molecule consists of three atoms; an oxygen atom and two hydrogen atoms, which are bond together like little magnets. The atoms consist of matter that has a nucleus in the centre. The difference between atoms is expressed by atomic numbers.
Which statement describes both predators and parasites?
A. They attack living organisms.
B. They live inside another living organism.
c. They feed on pieces of dead animals.
D. They kill animals for food.
Answers
Answer:
Which statement describes both predators and parasites?
They attack living organisms.
Explanation:
Both parasites and predators causes harm to other organism which might eventually lead to the death of the host as in the case of parasite and prey as in the case of predators. They both attach living organism for survival
Suppose Dylan marries woman with type O blood. Is it possible for any of their
children to also here? Why or why not?
Answers
Which term would be directly related to the science of ecology?
population density
circulatory system
genetics
taxonomy
last one i think?
Answers
Answer: population density
Explanation:
Yes! all because ecology seeks to understand the relationship between living organisms (plants, animals, microorganisms) and their environment while population density refers to the number of individual organisms in a unit area of space.
That is, Population density = Total population ➗ Area of habitat
Thus, population density is related and also a subset of ecology.
What happens during the light reaction of photosynthesis?
Air and water create energy for a plant.
Water molecules split apart.
Water molecules combine to make food.
Carbon dioxide is combined with glucose.
Answers
♡ The Question ♡
-What happens during the light reaction of photosynthesis?
* ୨୧ ┈┈┈┈┈┈┈┈┈┈┈┈ ୨୧*
♡ The Answer ♡
-Water molecules split apart.
*୨୧ ┈┈┈┈┈┈┈┈┈┈┈┈ ୨୧*
♡ The Explanation/Step-By-Step ♡
-No Explanation/Step-By-Step provided!
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♡ Tips ♡
-No Tips provided!
Which of the following adaptations is best suited for life in the pelagic zone?
•tubelike body shape
•gas-filled bag or swim bladder
•hard shell
•numerous legs
Answers
Answer:
Gas filled bag or swim bladder l
Explanation:
Answer:Gas filled bag or swim bladder
Explanation:
I’m smart
Which of these is an acceptable approach to major forestry issues?
A) clear-cutting to provide for industry and spur new growth
B) logging near rivers for transport but having stream protection zones
C) certification of a forest as well-managed versus sustainable
D) allowing no recreational use in a national forest
Answers
Answer:
Which of these is an acceptable approach to major forestry issues?
certification of a forest as well-managed versus sustainable
Explanation:
when forest are certified, it enables users to be aware of every rules and regulations and strict compliance of such, also it protects the biodiversity of organisms as no one has veto power to cut timbre unnecessarily or kill any wild animals
Answer:
C) certification of a forest as well-managed versus sustainable
Explanation:
took the test and got it right!
What is a good site to use for writing a science essy on mescosoms? And one that has an author? Please Help me out here!!!
Answers
Answer:brain pop
Explanation:
its all science
Choose the answer.
Herbie was in a terrible car accident and sustained head injuries. He is able to speak
but nothing he hears makes any sense to him. He can see people talking but it is all
jumbled. Which of these structures was probably injured in his accident?
O Broca's area
Wernicke's area
the hippocampus
the hypothalamus
Question 3 (2 points)
Answers
Wernicke's area was probably injured in his accident.
Option: B
Explanation:
The Wernicke area is the brain region which is required for the development of languages. It is situated in the temporal lobe on the left side of the brain and is essential for speech comprehension, whereas the region of Broca is connected to speech output.
The area is situated in the cerebral hemisphere's left portion generally near posterior region of the Superior Temporal Gyrus (STG).The brain's section named as lateral sulcus where the gathering of temporal lobe and parietal lobe take place in the auditory cortex, is covered in this zonal area.
Products that were made in the light reactions of photosynthesis, but are required by the
dark reactions
are ____ and ____
- oxygen and ATP
- oxygen and water
- oxygen and NADPH
- ATP and NADPH
Answers
Answer: ATP and NADPH
Explanation: Photosynthesis in higher plants involves two processes: light reactions which occurs only when plants are illuminated and carbon fixation reactions which are driven by products of light reactions.
In light reactions, chlorophyll and other pigments absorb light and conserve it as ATP and NADPH while oxygen is liberated but in carbon fixation reactions, ATP and NADPH are used to reduce carbon dioxide to form triose phosphates, starch, sucrose and other products derived from them.
What does a biologist study?
O
A. The history of ideas
O
B. The living world
C. Weather patterns
D. Subatomic particles
Answers
Answer: B. The living world
Explanation: Generally speaking, biologists study humans, animals, plants and bacteria to gain a better understanding of how the body and nature works
Answer:
The answer is B.
Explanation:
A biologist is a scientist who studies life, specifically organisms and their relationship to their environment. Generally speaking, biologists study humans, animals, plants and bacteria to gain a better understanding of how the body and nature works, and how external factors may influence each organism.
What is the difference
between self-pollination
and cross-pollination?
Answers
Explanation:
Cross pollination is the transfer of pollen grains from the anther of a flower to the stigma of a flower of a different plant of the same species.
Self pollination is the transfer of pollen grains from the anther to the stigma of the same flower
Self-pollination includes dust from a similar plant while cross-pollination includes various plants. Cross-fertilization prompts higher hereditary variety, making it more worthwhile.
When pollen from the anther is deposited on the stigma of the same flower or another flower on the same plant, self-pollination occurs. When the stamen and carpel of a flower mature simultaneously and are positioned so that pollen can easily land on the stigma, this method is common. Conversely, cross-fertilization includes the exchange of dust from the anther of one bloom to the disgrace of a blossom on an alternate person of similar species. This cycle advances more prominent quality assortment on the grounds that the hereditary material comes from two unique plants.Both methods of pollination have played a crucial role in agriculture.
Can I get some help please.
Answers
Answer:
D would be the outcome of natural disaster
Explanation:
The growth of the plants reset
What is the correct order of genetic material from smallest to largest?
allele, gene, DNA, chromosome, nucleus
DNA, gene, allele, chromosome, nucleus
nucleus, chromosome, DNA, gene, allele
Answers
Answer: allele, gene, DNA, chromosome, nucleus
Explanation: An allele is a variant of a gene or a different form of a gene. A gene is a segment of a DNA that codes for an RNA or a protein. A DNA is a genetic material that contains all the genetic information of an organism. A DNA is packaged and condensed into a threadlike material known as chromosome and chromosomes are found in the nucleus of a cell.
Answer:
the first one
Explanation:
How many arms does a octopus have
Answers
Answer:
8
Explanation:
beacue they are just like that
Answer:
6 arms
Explanation:
Many plants, such as the potato plant, avoid insect predation by producing highly toxic sap. However, the potato bug, unlike most insects, has adapted to the toxins and can still eat the potato plant. In turn, over a long period of time, potatoes are likely to develop more chemical defenses against the potato bugs.
This type of consistent adaptation between two species is known as
A. co-evolution.
B. commensalism.
C. a reliazed niche.
D. a fundamental niche.
Answers
Answer:
Many plants, such as the potato plant, avoid insect predation by producing highly toxic sap. However, the potato bug, unlike most insects, has adapted to the toxins and can still eat the potato plant. In turn, over a long period of time, potatoes are likely to develop more chemical defenses against the potato bugs.
Commensalism is the relationship that exists between both potato plant and potato bug
Explanation:
Commensalism entails relationship between two organisms where one gains and the other does not either gain or lose. The analogy above shows that the insect potato bug gains from the plant but the potato plant does not gain nor lose as a result of this
Answer:
A-Co-evolution
Explanation:
I got the question on UsaTestPrep
after completing the respiration and fermentation lab activity, your friend decides they want to know more about what factors affect respiratory rates. they learn how easy it is to construct a respirometer (a device that measure o2 consumption) and decide to build one for use with mice. it just so happens that you have dozens of pet mice and decide to help them with the experiments. of course, the procedure does not negatively impact the mice in any way.
Answers
Final answer:
To measure the rate of respiration in mice with a respirometer, factors such as temperature and the complexity of the respiratory system must be considered. CO2 produced during respiration should be absorbed by a substance like NaOH or KOH for accurate measurements. The brain's response to stimuli regulates respiratory rate and depth.
Explanation:
Factors Influencing Respiratory Rates in Mice
To accurately measure the rate of respiration in mice using a respirometer, it is crucial to consider and control various factors. The respirometer is a device designed to measure oxygen consumption, which is a direct indicator of the respiratory rate of an organism. Since the respirometer measures changes in gas volume, to account for the production of carbon dioxide as oxygen is consumed, a substance such as sodium hydroxide (NaOH) or potassium hydroxide (KOH) can be included in the setup to absorb the CO2 produced.
Variables that can affect respiratory rates include temperature, animal size, and the complexity of their respiratory systems. For instance, at different temperatures, the metabolism and thus the respiratory rate can change, as seen in the experiment comparing mice at 10°C and 25°C. The medulla oblongata and pons in the brain regulate the respiratory rate and depth of breathing in response to systemic stimuli, adjusting ventilation as needed.
All aerobic organisms, including mice, require oxygen for cellular respiration and production of adenosine triphosphate (ATP), the energy currency of the cell. This process is fundamental for maintaining the life processes of the organism. Aerobic respiration is also related to exercise and various activities in humans, where measuring oxygen use can indicate energy consumption.
Provide an example of how two populations could become isolated and explain how that isolation could lead to the evolution of a new species.
Answers
Ecological, or habitat, isolation occurs when two species that could interbreed do not because the species live in different areas. For example, in India both the lion and tiger exist and are capable of interbreeding; however, the lion lives in the grasslands and the tiger lives in the forest. The two species live in different habitats and will not encounter one another: each is isolated from the other species.
Change in an organism's environment forces the organism to adapt to fit the new environment, eventually causing it to evolve into a new species. ... Isolation means that organisms of the same species are separated, and happens when there is something between the organisms that they can't cross.
Final answer:
Habitat isolation can result from geographical changes like floods, leading to nature's forces such as natural selection and mutation driving genetic divergence and eventually the evolution of new species.
Explanation:
Populations can become isolated via a process known as habitat isolation, an essential mechanism leading to allopatric speciation. For instance, if a flood divides a cricket population, these two groups may be stranded in different environments. Without interaction, including reproduction, crucial genetic exchanges cease to occur, and the populations become genetically independent.
As time passes, forces such as natural selection, mutation, and genetic drift contribute to the divergence of the populations. This divergence can lead to significant evolutionary changes, sometimes to the point where the two populations can no longer interbreed, becoming distinct species. An example of a geographical barrier resulting in such isolation could be the formation of a new river or mountain range, separating populations and restricting gene flow.
What happens to the frequency if the period were to change from o.2 seconds to 0.5 seconds
Answers
Answer:
The Hz would change
Explanation:
For example, a wave with a time period of 2 seconds has a frequency of 1 ÷ 2 = 0.5 Hz.
please answer this correctly i need help! read carefully!!
What happens to the volume of a gas in a closed container if the temperature increases, but the pressure remains the same? Explain.
Answers
Answer:
The volume of a gas increases when it is placed in a closed container if the temperature increases, but the pressure remains the same. There is a direct relationship between volume and temperature. When one is increase, the other is automatically increased. Molecules of gases expands when temperature is increased. Due to expansion of gas molecules, the gas molecules occupy more space and so volume of gas particles increases.
Explain how energy impacts the quality of life for individuals and society.
Answers
Answer:
The increasing demand of energy affects the quality of life.
The more the use of energy, the more reliable and easier the life will be for an individual. A society which has more usage if energy will be more developed.
If energy, such as light, is not present in a society than the individuals will have trouble and will not be able to live a more simpler life.
The quality of life is greatly impacted by the amount of energy that is used by each individual as well as each society.
Final answer:
Energy availability greatly influences the quality of life, enabling convenience and economic growth in energy-rich societies while posing environmental, health, and social challenges. In contrast, energy-poor regions struggle with economic development and achieving a basic quality of life. Addressing these disparities and impacts is essential for a sustainable global future.
Explanation:
Energy profoundly impacts the quality of life for individuals and society as a whole, serving as a foundational element in modern civilization. Abundant energy availability enables the technological advancements and conveniences that characterize high standards of living in industrialized nations. However, energy production and consumption also have significant environmental, social, and political implications.
For societies in industrialized countries, energy consumption facilitates economic prosperity, powers a myriad of appliances that simplify daily chores, and supports systems that promote health and well-being. Yet, this energy-rich lifestyle is not without consequences. The extraction and usage of energy resources, including fossil fuels and nuclear power, can lead to environmental degradation, health hazards from pollution, and complex socio-political challenges such as civil unrest and global conflict over energy supplies. Renewable energy sources offer some solutions but also come with their own environmental and economic costs.
On the other hand, energy-poor regions face significant challenges. Lack of access to reliable energy sources limits economic growth, exacerbates poverty, and constrains the basic quality of life. Efforts to provide sustainable, affordable, and clean energy solutions are crucial for improving living conditions and promoting social equity worldwide.
This hypothesis states that viruses originated from more complex cells
Select one:
Answers
Answer:
The hypothesis that states that viruses originated from more complex cells is called the regressive hypothesis.
Explanation:
The regressive hypothesis -also called degenerative hypothesis- raises the possibility that viruses originally were cells that behaved as symbionts or parasites of other cells, and this condition of dependence could have originated the disappearance of genes, becoming structures formed by nucleic acid inside a viral capsid (virus).
Some evidence gathered to support this theory suggests that some bacteria, such as rickettsia, need to parasitize a cell in order to replicate, just as viruses do.
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What happens when fertilization occurs?
Answers
Answer:
What happens when fertilization occurs?
When fertilization occurs, zygote is produced as a result of this which led to transfer of genetic traits to the zygote inherited from the parents
Explanation:
What happens to sister chromatids in meiosis II? *
Answers
In meiosis II, sister chromatids in the haploid cells formed from meiosis I are separated, resulting in four genetically distinct haploid cells. This process closely resembles mitotic division, with anaphase II being the stage where sister chromatids are pulled toward opposite poles of the cell.
During meiosis II, the process involves the separation of sister chromatids that are present in the haploid cells formed from meiosis I. This essential step concludes with the creation of four unique haploid cells, each carrying a single set of genetic information. The stages of meiosis II run in parallel for the two cells that resulted from meiosis I. One noteworthy fact is that meiosis II is akin to the mitotic division observed in haploid cells. After progressing through stages such as prophase II and prometaphase II, the cell reaches anaphase II.
In anaphase II, kinetochore microtubules pull the sister chromatids apart, ensuring that they migrate toward opposite poles of the cell. Consequently, each chromatid now becomes an individual chromosome. The non-kinetochore microtubules function to elongate the cell during this phase. The separation in anaphase II results in the presence of 23 chromosomes at both poles of the cell.
If sister chromatids do not separate properly during meiosis II, it may lead to the production of abnormal gametes, with one gamete containing an extra copy of the chromosome and another lacking it altogether.
1.
A moon on the opposite side of the sun is called a ______ moon.
full
new
2.
Sun directly behind the moon is called a ________ moon.
full
new
3.
A moon that is more than half full is called a _______ moon.
gibbous
new
Answers
A moon on the opposite side of the sun is called a full moon. Sun directly behind the moon is called a new moon. A moon that is more than half full is called a gibbous moon. Thus, the correct options for 1, 2, and 3 are A, B, and A, respectively.
What are the phases of Moon?A moon phase is the shape of moon's sunlit portion as seen from the Earth. There are a total of eight different phases of moon which are new, waxing crescent, first quarter, waxing gibbous, full, waning gibbous, third quarter, and waning crescent. These phases repeat in the cycle after every 29.5 days.
A moon on the opposite side of the Sun is called a full moon. Sun directly behind the moon is a new moon. A moon that is more than half full is called a gibbous moon.
Therefore, the correct options for 1, 2, and 3 are A, B, and A, respectively.
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list several mutagens that can increase the frequency of mutations
Answers
Answer:
Mutagens can be described as substances which cause mutation. Mutations can be described as any changes in the DNA of an organism.
Mutations can be introduced by chemicals or naturally.
Mutagens which can cause mutations are:
X-raysUltraviolet radiationChemical mutagens such as Alkylating agents such as ethylnitrosourea. Certain AlkaloidBromine