Answer and Explanation:
Mitosis is a process in which a single cell distribute into two identical cells. Mitosis include five phases which depend on the physical state of the spindle and chromosomes. Every phase of the mitosis use pipe cleaners to signify the chromosomes. Body cells have about 46 chromosomes. For simplification we use 4 chromosomes. Pipeline activity of the mitosis include different kind of material. In step 1 take two plates and stack them on the top of each other. Plates signify the cell. On the top plate, place 4 pipe cleaner. In step 2 pipe cleaner of the same length and color subsequent to each other. Then twist each pair together. “X” signify the duplicate chromosomes. Two different colors shows that one chromosome came from the mother and one from the father. Through the process of DNA duplication, chromosomes are copied. In the S stage of interphase, DNA copying take place before mitosis. When the chromosomes become visible, prophase might be identified. Then in the center of the plate, line up the chromosomes in a single line, that represent a cell in metaphase. In Anaphase, separate each chromosome by unraveling them. Telophase is the last phase of the mitosis. Cytokinesis begins in this phase. In mitosis, chromosomes goes back to the correct parent so making the data in accurate.
Answer:
The answer is Norepinephrine.
Explanation:
Acetylcholine (Ach) and Norepinephrine (NE) are both chemical substances (neurotransmitters) released primarily by nerve cells and they affect different parts and systems of the body. Acetylcholine mostly targets the muscles and the brain and it is a part of the parasymphatetic nervous system whereas norepinephrine targets the whole body and has an effect that leads to the contraction of muscles and the increase of the heart rate. Norepinephrine is a part of the symphatetic nervous system.
Since the symphatetic nervous system is responsible for the crucial "fight-or-flight" response of our body, it has a more dramatic effect on the muscle contraction. Norepinephrine, being a part of the symphatetic nervous system, should result in a more drastic change in contractile force.
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Answer: Microtubules are straight and hollow tubular structures with no limiting membrane arranged in different bundles which are made of globular protein called tubulin while microfilaments are long and fine thread like structures which are made up of non tubular contractile protein called actin and myosin.
Explanation: Microtubules may function alone or join with other proteins to form more complex structures like cilia, flagella or centrioles and perform various functions like
1) Act as conveyer belts which allow movement of granules, vesicles, protein molecules and other organelles like mitochondria to different part of the cell.
2) Form the spindle fibers which separate the chromosomes during mitosis and responsible for the movement of centrioles.
Microfilaments are present throughout the cytoplasm. They are responsible for:
1) Give structure strength and provide resistance to cell against the pulling forces
2) Responsible for cellular movements like contraction, gliding and cytokinesis (partition of cytoplasm during cell division)
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