The functional contractile unit of the myofibril is the sarcomere. Sarcomeres contain thick and thin filaments composed of myosin and actin, respectively. They are responsible for muscle contraction.
Explanation:The functional contractile unit of the myofibril is the sarcomere. The sarcomere is approximately 2 μm in length with a three-dimensional cylinder-like arrangement and is bordered by structures called Z-discs, to which the actin myofilaments are anchored. Myofibrils are composed of thick and thin filaments, where thick filaments are composed of the protein myosin and thin filaments are composed of the protein actin. The sarcomere, along with its components, functions in contraction, the primary function of muscle tissue. Therefore, as each sarcomere within myofibrils contracts, the entire muscle cell contracts.
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During a home visit, a nurse discovers that a child in the household has a disability and has been experiencing seizures. in addition, the child's parent is indifferent to the child's physical, emotional, or medical needs and seems to provoke seizure episodes by harsh verbal exchanges with the child. the nurse believes that an intervention by an appropriate community resource is indicated. where should the nurse direct the referral?
Answer:
Child Protective Services (CPS)
Explanation:
In the United States, if there are suspicions of abuse occurring towards a minor in a household, the CPS should be contacted. In some states, CPS is known as the Department of Children & Family Services.
If the nurse finds that the child's parent behavior towards the disabled child is causing distress and can be classified as neglect and abuse, she should contact the CPS. The CPS would conduct an investigation and remove the child from the custody of the parents until the results of the investigation have clarified the ongoing situation.
A woman and her male partner have normal color vision. however, her father and her first son are colorblind. what is her genotype
What "drives" plate tectonics?
A) lava
B) conduction
C) continental drift
D) heat and convection
In the system shown below, there are 80 x particles, all in region A (the left half of the box). No extra particles can enter the system. When the system is in equilibrium, what will be true of the particles?
A. Since there are no y particles, the system is already in equilibrium with all 80 x particles in a.
B. Due to the constant motion of particles, this system will never reach equilibrium.
C. In equilibrium, there will be exactly 40 x particles in A and 40 x particles in B, and those numbers will remain constant.
D. In equilibrium, there will be approximately 40 x particles in A and 40 x particles in B, and those numbers will fluctuate but will remain near 40.
Answer:
D. In equilibrium, there will be approximately 40 x particles in A and 40 x particles in B, and those numbers will fluctuate but will remain near 40.
Explanation:
The perfect euilibrium is hard to achieve given the fact that particles move and are in constant change, but the equilibrium is reached when both boxes have a close number of particles in each of them, for example 41 and 39, 40 and 40, 42 and 38, this change in the number of particles is due to the movement of the particles, but it is still reachable.
A person undergoes hypnosis, and her hand is put in ice. she does not show signs of being in pain. which of these statements is consistent with the dissociation theory?
Under the dissociation theory of hypnosis, a person may not show pain during hypnosis because of a dissociated state of consciousness where the conscious mind does not fully process pain signals, consistent with research by Ernest Hilgard.
Explanation:The statement consistent with the . In this state, the person's attention is diverted, such that the pain signals are not fully processed by the conscious mind. This concept aligns with Ernest Hilgard's experiments on hypnosis and pain, wherein participants showed a split in consciousness, allowing them to not report feeling pain even though their physiological responses indicated otherwise.
A zygote will develop into an___during the early stages.
is Zinc is a silver-gray metal qualitative, quantitative, or neither
What effect does planting trees and bushes on a steep hill have?
Rag the pink labels to the pink targets, indicating the relative concentration of glucose inside and outside the cell. drag the correct white label to the white target, indicating the direction that na+ ions and glucose move through the cotransporter. drag the blue labels to complete the sentences on the right, indicating how na+ ions and glucose move through the cotransporter relative to their electrochemical and concentration gradients.
Answer:
look at the person above me thanks
Explanation:
Describe the importance of high heat of vaporization to ecosystems. I appreciate your help. ;)
Plaque consists of a biofilm, with bacteria carefully arranged in a community. what are the advantages of forming a biofilm?
In the image below, in which location is limestone formed?
Diagram showing the carbon cycle. At Location A, a river meets an ocean. At Location B, sediments sink to the bottom of the deep ocean. At Location C, green plants perform photosynthesis. At Location D, a factory burns fossil fuels.
Public Domain
A
B
C
D
The location where the limestone is formed in the image below is the location B. Thus, the correct option will be B.
What is limestone?Limestone can be defined as a type of carbonate sedimentary rock which is one of the main sources of material lime. Limestone is composed mostly of the minerals calcite and aragonite, which are the two different crystal forms of CaCO₃. Limestone forms when these two minerals precipitate out of the water which is containing the dissolved calcium.
In the image provided in the question, the location where limestone is formed is the location B, sediments part of the cycle.
Therefore, the correct option will be B.
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If an amino acid has a side chain (r group) that is charged (i.e. bears a full + or – charge), which amino acid group would it belong in?
The answer is charged amino acid group.
Grouping of amino acid into one of three categories are only based on its R group. And there is an amino and carboxyl group are present in the amino acid that are ionized so we can say that amino acid is technically charged and there is one thing to remember that Amino acids that are classified as polar, they are not having any charge.
Open dumping in landfills was outlawed in many states because of _____.
the answer choices were supposed to be
groundwater pollution
methane explosions
their unsightliness
foul odors
Answer:
Open dumping in landfills was outlawed in many states because of land and water environments.
Explanation:
An open dumping is defined as a land disposal site at which solid wastes are disposed of in a manner that does not protect the environment, are susceptible to open burning, and are exposed to the elements, vectors, and scavengers.
What are the four conditions needed to see an object?
Answer:
The four conditions to see an object are, source of light, object,eye and brain.
Explanation:
Four conditions necessary to see an object;
1. You need a light to be able to see an object. We need source of light which emit light and is reflected by the object.
2. An object must be able to reflect the light for it to be seen.
3. The eyes. It serve as a screen where the image is formed. The retina focus and receives the light Ray reflected by the object.
4. The brain processes it and interpret what was reflected so that we can identify and we can see.
If you look at a plant cell under the microscope what would you notice that is different from an animal cell
Dr. nguyen's experimental rats have learned the location of a food treat in a maze. she removed their hippocampi 3 hours after the rats located the food. what will be the effect on the rat's memory for the food's location?
The science that applies the mechanical principles of physics and engineering to the investigation of human movement and the structure and function of the human body is called
Activation of the sympathetic nervous system question 13 options:
a.increases respiration and decreases salivation.
b.increases respiration and increases salivation.
c.decreases respiration and increases salivation.
d.decreases respiration and decreases salivation. save
Answer:
The answer is A .increases respiration and decreases salivation.
Explanation:
Describe the pathway of scientific inquiry by which henri becquerel discovered that uranium gives off a type of radiation
Final answer:
Henri Becquerel's discovery of uranium radiation began with the observation that a uranium compound darkened a photographic plate through black cloth, leading to experiments that established the phenomenon as nuclear radioactivity. This discovery laid the foundation for nuclear physics, contributing to our understanding of atomic structure.
Explanation:
The pathway of scientific inquiry by which Henri Becquerel discovered that uranium gives off a type of radiation began in 1896, as a result of his curiosity and thorough experimentation. Becquerel found that a uranium compound placed near a photographic plate could darken the plate, even when wrapped in black cloth, indicating the emission of unseen penetrating rays. This accidental discovery led him to further investigate, finding that the effect was specific to uranium compounds, and not affected by external conditions such as light blockage, temperature, or pressure. These penetrating rays were later understood to originate from the nucleus of the atom, marking the discovery of nuclear radioactivity, an area that would be further explored by Marie Curie and her research on radium and polonium.
Through experimenting with different conditions and materials, Becquerel was able to conclude that the radiation emitted by uranium was a new type, which he termed radiations. This discovery marked a fundamental shift in understanding atomic structure and laid the groundwork for the field of nuclear physics. The radiation emitted by uranium and later studied by the Curies, did not vary with chemical state or physical conditions, indicating a source within the nucleus of the atom, distinct from known electromagnetic and chemical interactions of the time.
The ________ spreads more parasitic diseases to humans than any other vector.
What is the correct description of alcoholic fermentation?
A. an anaerobic process that has CO2 as a byproduct
B. an anaerobic process that occurs in muscles
C. an aerobic process that produces ATP from pyruvic acid
D. an aerobic process that occurs in cytoplasm
Some organisms undergo asexual reproduction through mitosis, while others reproduce sexually, and their cells undergo meiosis to produce gametes. If there were drastic changes in temperature in an ecosystem, which process do you predict would be most beneficial to a species? Mitosis: it causes genetic mutations, which may be favorable to the species. Meiosis: it increases genetic variation, which helps ensure the species will survive. Meiosis: it produces more daughter cells, which increases the population of the species. Mitosis: it produces identical offspring, which increases genetic variation.
Answer:
Meiosis: it increases genetic variation, which helps ensure the species will survive.
Explanation:
Crossing over and genetic recombination happen during meiosis and both processes ensure that the daughter cells are genetically variant from the parent cells.
Crossing over and genetic recombination increase the genetic variability of a population and consequently increases their chances of survival in case of changes to the environment.
What condition occurs when the stomach twists glanders torsion septicemia pox?
Answer:
The answer is Torsion.
Explanation:
How does atp supply energy to power metabolism?
Final answer:
ATP supplies energy to power metabolism by serving as the primary energy currency in cells. It is generated through the metabolism of glucose and releases energy when it is hydrolyzed. This energy is used to fuel various cellular functions.
Explanation:
ATP supplies energy to power metabolism through its role as the primary energy currency in cells. When ATP is hydrolyzed, it releases a phosphate group and forms ADP, releasing energy that can be used for cellular processes. This energy is used to fuel functions such as muscle contraction, nerve cell activity, and absorption of nutrients in the gastrointestinal tract.
Most of the ATP in living organisms is generated through the metabolism of glucose. During glucose catabolism, glucose is broken down through a series of enzymatic steps in glycolysis, producing ATP as a byproduct. The energy obtained from glucose metabolism is used to regenerate ATP and power the multitude of energy-requiring pathways in cells.
Genetic variation is based on the: A. Sugars B. Hydrogen Bonds C. Phosphate groups D. Nitrogen Bases
Genetic variation is based on nitrogenous bases. Thus, the correct option for this question is D.
What do you mean by Genetic variations?Genetic variations may be defined as the difference in DNA sequences in the genomes between individuals within a population. The process of variation is initiated by the germ cells which is later shown by the somatic cell as well.
The genetic information is encoded in the DNA sequences with the help of nitrogenous bases like Adenine, Thymine, Guanine, and Cytosine. In these nitrogenous bases, the phosphate groups are attached in order to make them more functional. When the information is transcripted into mRNA, Uracil is encoded in place of thymine.
Therefore, genetic variation is based on nitrogenous bases. Thus, the correct option for this question is D.
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The hydrophobic tail of phospholipids moves to the _____ of the cell membrane.
A.
inside
B.
outside
Which energy production method does not ultimately depend on the sun?
What is a cost of using technology to transport water?
Answer:
Freshwater supplies can be depleted in an area.
Explanation:
If a cell was observed under the microscope and found to have a rigid cell wall and be green in color that cell is most likely a
Animal cell
Plant cell
Bacterium cell
Algae cell