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Physiology
The pineal gland produces melatonin, a hormone that helps regulate sleep-wake cycles. Melatonin is synthesized and released in response to darkness, signaling the body to prepare for sleep.
Oral Surgery
Hydrolysis of amide type of local anaesthetic salts is facilitated by tissue pH above 7.0.
Physiology
Bile acids are actively reabsorbed in the ileum, primarily by the sodium-dependent bile acid transporter (ASBT), and returned to the liver.