1.Which of the following statements best describes homeostasis?
CALCIUM PHOSPHATE HOMEOSTASIS
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Roohi Sakina
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
1.Which of the following statements best describes homeostasis?
a) Keeping the body in a fixed and unaltered state.
b) Dynamic equilibrium.
c) Maintaining a near-constant internal environment.
d) Altering the external environment to accommodate the body's needs.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
2.A small Ca binding protein that modifies the activity of many enzymes and other proteins in response to changes of Ca2+ concentration, is known as:
a) Cycline
b) Calmodulin
c) Collagen
d) Kinesin
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
3. Which of the following hormone interact to regulate 1α-hydroxylase activity
a) Parathyroid hormone
b) calcitriol
c) calcitonin
d) thyroid hormone
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
4.Which of the following hormones is not important in calcium homeostasis?
a)Calcitonin
b) Parathyroid hormone
c) 1,25-dihydroxycholecalciferol
d) Glucagon
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
5.Which of the following statements regarding calcium homeostasis is not true?
a) Extracellular calcium concentration is monitored in the parathyroid.
b) Inhibition of osteoclast activity helps restore high extracellular calcium concentration to normal levels.
c) Calcitonin and parathyroid hormone have opposing effects on extracellular calcium concentration.
d) 1,25-dihydrocycholecalciferol and parathyroid hormone have opposing effects on extracellular calcium concentration.
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