Answer:
Hiya there!
Explanation:
ATP then binds to myosin, moving the myosin to its high-energy state, releasing the myosin head from the actin active site. ATP can then attach to myosin, which allows the cross-bridge cycle to start again; further muscle contraction can occur.
acetylcholine
: Skeletal muscle contraction and changes with exercise. (A) Neurotransmitter (acetylcholine, ACh) released from nerve endings binds to receptors (AChRs) on the muscle surface.
The muscle contraction cycle is triggered by calcium ions binding to the protein complex troponin, exposing the active-binding sites on the actin. As soon as the actin-binding sites are uncovered, the high-energy myosin head bridges the gap, forming a cross-bridge.
Credit sourced from "bio.libretexts.org"
Hope this <em><u>Helped!</u></em> :D
Answer:
A diploid cell, with a chromosome charge of 2n = 2 will have in:
- <em>G1 = 4 strands of DNA, two for each DNA molecule.
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- <em>G2 = 8 strands of DNA.
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- <em>Prophase I = 8 strands of DNA.
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- <em>Telophase II = 2 DNA strands per nucleus.</em>
Explanation:
The cell cycle is divided, broadly speaking, into interphase and cell division (M). The process of division -by mitosis or meiosis- involves a series of intermediate steps that conclude with the production of two identical cells (diploid) or two cells with half the chromosome load (haploid), respectively.
- <em>In the </em><em>G1 phase</em><em> the cell is in interphase, so the nuclear DNA has not yet replicated. For a cell with 2n = 2, its nucleus has four strands of DNA.
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- <em>In </em><em>G2 phase</em><em>, after DNA replication, the number of DNA strands is doubled, so now in the cell nucleus of the cell there are 4 DNA molecules, each with double strands, so there is a total of 8 DNA strands.
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- <em>In </em><em>prophase I </em><em>of mitosis or meiosis the cell still does not divide there are 4 DNA molecules and 8 DNA strands, as in the previous step.
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- <em>In </em><em>telophase II</em><em>, which only occurs in meiosis, the chromosome charge has been halved, so each daughter cell will have one chromosome (n = 1), one single DNA molecule and 2 DNA strands per nucleus.</em>
Simply place a 2 above each ...... gene pair and a one above each .... gene pair. Then multiply the numbers together to obtain the total number of different possible gametes.
<u><em>This is a tip,hope it helps!</em></u>
Answer and Explanation:
The sensory information encoded for by the hair cells in the maculae of the saccule and utricule are:
- the direction and strength of mechanical stimuli (polarity information)
- Response to the head's rotational movement
Functions of the otoliths
The otoliths provide balance, movements and serve as directional indicators in vertebrates. They help higher vertebrates in sound detection.
Functions of the vestibular nuclei
- Maintenance of equilibrium and posture
- Modification of muscle tone
- Relays information to the cerebral cortex
- Directing the movements of the head and eye
- Maintaining the line of vision
