Which of the following is considered to be a positive chronotropic agent?
a. acetylcholine
b. sodium channel antagonists
c. isoproterenol
d. calcium channel blockers
Answer: c. isoproterenol
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The thyroid gland has a special ability to remove the element ________ from the blood.
Fill in the blank(s) with the appropriate word(s).
The parotid glands are
A. the largest salivary glands. B. under the tongue. C. the smallest salivary glands. D. in the lower jaw.
Changes in stomach activity as the stomach stretches with food are most closely associated with:
a. external influences b. local changes in the digestive tract c. intrinsic nerve plexus d. extrinsic autonomic nerves e. gastrointestinal hormones
Explain where sodium and potassium ions are located relative to a muscle cell during resting membrane potential
What will be an ideal response?