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dit View History Bookmarks People Window Help -s-Preuett Anna × McCraw-Hill Education Camp x a connect https://newconnect.mheducation.com/flow/connect.html ter 27 Connect quiz x G buffers 1) contains salts of w X Help Save&Exit; Sul Indicate whether each statement is true or false regarding extracellular calcium ion concentration. 1 A below-normal level of Ca2t in the extracellular fluid is caled hypocalcemia. Ccs 2. An above-normal level of Ca2+ in the extracellular fluid is called hypercalcemia. Ck to 3. In response to hypocalcemia, the parathyroid gland decreases secretion of parathyroid hormone. (Cick to select) 4. In response to hypercalcemia, the parathyroid gland increases secretion of parathyroid hormone. Cick to select 2 3 4Explanation / Answer
Answer 1:- True
The extracellular calcium concentration is regulated and maintained in ‘calcium homeostasis’. The decrease in extracellular calcium level below normal is called as ‘hypocalcemia’. The hypocalcemia causes the hyperactivity of nerve and muscle cells. Thus the given statement is true.
Answer 2:- True
The extracellular calcium concentration is regulated and maintained in ‘calcium homeostasis’. The increase in extracellular calcium level below normal is called as ‘hypercalcemia’. The hypercalcemia causes the depressed activity nerve and muscle cells. Thus the given statement is true.
Answer 3:- False
The parathyroid hormone is responsible for maintain and regulating the calcium levels in extracellular fluid. The calcium regulation involving parathyroid hormone occurs due to the negative feedback mechanism. The low level of calcium in extracellular fluid (hypocalcemia) stimulates i.e., increases secretion of parathyroid hormone.
Answer 4:- False
The parathyroid hormone is responsible for maintain and regulating the calcium levels in extracellular fluid. The calcium regulation involving parathyroid hormone occurs due to the negative feedback mechanism. The high level of calcium in extracellular fluid (hypercalcemia) decreases secretion of parathyroid hormone.
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