It can become an ion because it can lose or gain an electron. It can become a part of molecule because it can form covalent bond with other atoms to gain a full valence shell.
Answer:
you didnt post the diagram
Explanation:
The correct option is B
Acetylcholine released into the junction between a motor neuron and a skeletal muscle binds to a sodium/potassium channel and opens it. This is an example of the ligand-gated channel.
The acetylcholine receptors are cation-selective members of the ligand-gated ion channels which are pentameric and also are oligomeric protein assemblies that process to convert a chemical signal through the postsynaptic membrane into an ion flux.
Acetylcholine opens the sodium and potassium channels of a cell which makes the concentrations of these two ions inside and outside stabilize and depolarize the membrane of the cell.
This depolarization will result in the formation of nerve impulses. The receptors in muscle fibers recognize acetylcholine as a sign of muscle contraction from neuron to muscle.
Therefore, acetylcholine receptors are actually pentameric ligand-gated ion channels but muscarinic acetylcholine receptors are coupled membrane proteins of seven helix G-proteins.
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Answer:
One possible explanation for why <u><em>maternal age</em></u> is a primary risk factor for autosomal trisomy is that oocytes remain in meiosis I until ovulation, which could take<em> place many years after birth, making them more susceptible to damage.</em>
Explanation:
Increasing age becomes a risk for abnormal children like children with autosomal trisomy because as the age of the female increases, the chances of abnormal division of chromosomes in the egg of the female also increases. After the age of 30, the chance of having a baby with autosomal trisomy increases exponentially. The risk primarily increase because of the abnormalities in meiosis in the women.
Answer:
A leaf consists of three main parts: i) the petiole, ii) leaf base, and iii) lamina or leaf blade. Functions. Making food for the plant with the help of sunlight, carbon dioxide, and water through photosynthesis. Helping in reproduction such as in Bryophyllum, a group of sprout leaf plants.
Explanation:
