What is the stimulus for the release of insulin?
Low blood volume
Low blood levels of calcium
High blood levels of glucose
High blood levels of potassium
The Correct Answer is C
A. Low blood volume:
This stimulates ADH and aldosterone, not insulin.
B. Low blood levels of calcium:
This stimulates parathyroid hormone (PTH), not insulin.
C. High blood levels of glucose:
Insulin is secreted by the pancreas in response to elevated blood glucose to facilitate cellular uptake of glucose.
D. High blood levels of potassium:
Though insulin helps drive potassium into cells, its release is primarily stimulated by glucose.
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Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Increase blood calcium: PTH increases it; calcitonin decreases it.
B. Both secreted by parathyroid gland: PTH is from parathyroid, calcitonin from thyroid.
C. Decrease blood calcium: Only calcitonin does; PTH increases calcium.
D. Control blood levels of calcium: Together they regulate calcium homeostasis.
Correct Answer is A
Explanation
A. Causes Na+ and water reabsorption:
Aldosterone increases sodium (and water) reabsorption in the kidneys, which raises blood volume and pressure.
B. Depletes blood volume:
Aldosterone helps increase blood volume.
C. Causes K+ reabsorption:
Aldosterone promotes potassium excretion, not reabsorption.
D. Cause Na+ excretion:
Aldosterone causes sodium retention, not excretion.
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