What is a function of calcitonin?
Accelerates Ca2+ release from bone
Stimulates Ca2+ excretion by the kidneys
Increases Ca2+ deposition in bone
Stimulates the formation of calcitriol in the kidneys
The Correct Answer is C
a) Accelerates Ca²⁺ release from bone: This is a function of parathyroid hormone (PTH), not calcitonin.
b) Stimulates Ca²⁺ excretion by the kidneys: While calcitonin may promote calcium excretion slightly, its main action is on bone, not the kidneys.
c) Increases Ca²⁺ deposition in bone: Calcitonin, secreted by the thyroid gland’s parafollicular (C) cells, lowers blood calcium by inhibiting osteoclast activity and enhancing calcium deposition in bones.
d) Stimulates the formation of calcitriol in the kidneys: This is primarily a function of PTH, which promotes the synthesis of active vitamin D (calcitriol) in the kidneys
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
a) The location of the tissue or organ with respect to the circulatory path: Hormones are carried through the entire bloodstream, so all tissues are exposed. Proximity doesn’t determine responsiveness.
b) The membrane potential of the cells of the target organ: Membrane potential may affect nerve impulse conduction, but not hormone specificity.
c) the presence of the appropriate receptors on the cells of the target tissue or organ: Hormones act only on target cells that express specific receptors for them. No receptor = no response.
d) All hormones stimulate any and all cell types because hormones are powerful and nonspecific: Hormones are highly specific and only act on cells with matching receptors.
Correct Answer is D
Explanation
a) It is transported to the liver and becomes part of the bile: This applies to bilirubin, a byproduct of heme, not iron.
b) It is converted into stercobilin and gives color to feces: Stercobilin is derived from bilirubin, not iron.
c) It is used to synthesize proteins: While iron is important in protein function, its primary fate is recycling for hemoglobin.
d) It attaches to transferrin and is transported to bone marrow for use in hemoglobin synthesis. Iron is bound to transferrin in the blood and transported to the bone marrow for new red blood cell (hemoglobin) synthesis.
Whether you are a student looking to ace your exams or a practicing nurse seeking to enhance your expertise , our nursing education contents will empower you with the confidence and competence to make a difference in the lives of patients and become a respected leader in the healthcare field.
Visit Naxlex, invest in your future and unlock endless possibilities with our unparalleled nursing education contents today
Report Wrong Answer on the Current Question
Do you disagree with the answer? If yes, what is your expected answer? Explain.
Kindly be descriptive with the issue you are facing.