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I am confused about my teacher's notes. "Acid secretion is stimulated by ACh, gastrin and histamine. Histamine stimulates adenylate cyclase which increases cAMP production."
When I looked this up apparently gastrin decreases AC (adenylate cyclase) production. If histamine and gastrin both stimulate acid secretion why does one increase and the other decrease AC?
Also in her notes the acid secretion inhibitors are acid, protein, fat as they cause the secretion of CCK and secretin and these stimulate AC. But I thought AC stimulated acid secretion not inhibited it?
How does blood flow from the pancreas to the heart?
Details where gas exchange occurs,Chambers and valves ect.
What receptors (listed down below) would be strongly activated during/straight after a “fight or flight” response and why? (related to sympathetic and parasympathetic systems)
- Testosterone receptors expressed by skeletal muscle
- Muscarinic receptors expresses by smooth muscle cells of small intestines
- Beta-adrenergic receptors in cardiac myocytes
- Nicotonic acetylcholine receptors on sweat glands
- Acetylcholine receptors in autonomic ganglia