Nicotine is
A. a neurotransmitter.
B. a cholinergic antagonist.
C. a beta-adrenergic agonist.
D. a cholinergic agonist.
E. an alpha-adrenergic antagonist.
Answer: D
You might also like to view...
Exhaustion of energy reserves or decline in pH due to production and dissociation of lactic acid causes
A) muscle contraction. B) the conduction of neural information to the muscle fiber. C) muscle relaxation. D) muscle fatigue. E) the striated appearance of skeletal muscle.
____________ are anterior pituitary cells that synthesize and secrete FSH and LH
Fill in the blank(s) with correct word
What aspect of blood chemistry is sensed by the carotid bodies?
A. cerebrospinal fluid (CSF) pH B. pulmonary arterial O2 content C. pulmonary venous hemoglobin content D. systemic arterial PO2 E. systemic venous PCO2
Vasoconstriction is caused by ______ stimulation of vascular smooth muscle; ______ stimulation of vascular smooth muscle causes vasodilation
A. decreased; increased B. parasympathetic; sympathetic C. sympathetic; increased D. parasympathetic; decreased E. sympathetic; parasympathetic