The action potentials from the sympathetic neurons ________, while the action potentials from the parasympathetic neurons ________.
A. increase heart rate and contraction strength; decrease heart rate and contraction strength
B. increase heart rate and contraction strength; decrease heart rate but do not affect heart contraction strength
C. decrease heart contraction and contraction strength; increase heart rate and contraction strength
D. increase heart rate but do not affect heart contraction strength; decrease heart rate but do not affect heart contraction strength
Answer: B
You might also like to view...
The respiratory centers regulate the activities of the respiratory muscles by
A) acting directly to change heart rate and cardiac output. B) responding to conscious control during periods of physiological stress only. C) adjusting the frequency and depth of pulmonary ventilation. D) stimulating the nuclei of the parasympathetic nervous system. E) None of the answers are correct.
This condition is characterized by neurofibrillary plaques and tangles:
a. Parkinson's disease b. amnesia c. MS d. CVA e. Alzheimer's disease
All of the following conditions may result in the release of adrenal medullary hormones, except ________.
A. consuming a large meal B. low blood glucose C. stress D. injury E. exercise
The amount of potassium excreted by the kidneys is regulated mainly by
A) ADH. B) aldosterone. C) parathormone. D) atrial natriuretic peptides. E) glucocorticoids.