Excess potassium ions in cardiac tissue cause
A. an increased heart rate.
B. a rapid repolarization of cardiac cells.
C. a decrease in the frequency of action potentials in the conduction system.
D. an increase in stroke volume.
E. an increase in the frequency of action potentials.
C
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The three half-circle-shaped canals in the inner ear that function in the maintenance of rotational equilibrium are called _____ canals
Fill in the blank(s) with correct word
After her last check-up, Harriet was informed that her active Vitamin D levels were low. Which of the following conditions may explain why this is so?
A. Melanin production has increased due to sun exposure, reducing Vitamin D activation. B. An increase in Vitamin D absorption at the intestines has overwhelmed the homeostasis of vitamin production at the kidneys. C. Liver dysfunction has reduced the conversion of cholecalciferol to the intermediate for calcitriol production.
Which unicellular gland is responsible for mucus secretion?
A) adipocyte B) fibroblast C) goblet cell D) mast cell
Which of the following is NOT a component of a negative feedback mechanism?
A. effector B. stabilizer C. control center D. receptor