When a neurotransmitter causes the opening of chemically gated potassium channels on the postsynaptic cell, the postsynaptic potential that results is an
A. EPSP, which is a depolarization.
B. EPSP, which is a hyperpolarization
C. IPSP, which is a depolarization.
D. IPSP, which is a hyperpolarization.
D. IPSP, which is a hyperpolarization.
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Gigantism and acromegaly occur as a result of
A) overproduction of parathyroid hormone. B) insufficient secretion of epinephrine. C) overproduction of growth hormone. D) overproduction of mineralocorticoids. E) insufficient production of estrogen.
The extracellular material of tissues is called ________.
A. plasma B. fibroblast C. lymph D. cytoplasm E. matrix
Match the acid-base disturbance with the clinical scenario and arterial blood gases. An individual with cardiopulmonary arrest; pH = 6.85; [HCO3-] = 10 mEq/L; PCO2 = 60 mm Hg
A. metabolic acidosis with respiratory compensation B. metabolic alkalosis with respiratory compensation C. respiratory acidosis with renal compensation (chronic respiratory acidosis) D. respiratory acidosis without renal compensation (acute respiratory acidosis) E. metabolic acidosis and respiratory acidosis
Which of the following is more effective in producing bronchodilation?
A) Thyroxine B) Norepinephrine C) Nicotine D) Muscarine E) Acetylcholine