<span>Estrogen is involved in a feedback mechanism associated with the follicular phase of menstruation. </span>
Parietal cells produce gastric acid (hydrochloric acid) in response to histamine (via H2 receptors), acetylcholine (M3 receptors) and gastrin (gastrin receptors). Parietal cells contain an extensive secretory network (called canaliculi) from which the HCl is secreted by active transport into the stomach.
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Please put this question in English and I would then love to help you. Thanks.
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grass
Explanation:
grass produces the main source of energy for the food chain
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The last one does not happen meiosis create four genetically different haploid cells
