4) What neurotransmitter is released by the axon of a sympathetic preganglionic

Question

4) What neurotransmitter is released by the axon of a sympathetic preganglionic neuron to communicate with the sympathetic postganglionic neuron? A) adrenalin B) norepinephrine C) acetylcholine D) epinephrine 5) Receptors that bind norepinephrine and epinephrine are known as: A) cholinergic. B) muscarinic. C) adrenergic. D) nicotinic. 6) What effect does a 2 agonist have on the diameter of respiratory passages? A) The diameter of the respiratory passageways will increase. B) The diameter of the respiratory passageways will decrease. C) The drug will have no effect on passageway diameter. D) The diameter of the respiratory passageways will decrease first, and then increase. 7) Drugs known as beta-blockers may be useful in treating: A) a fast heart rate. C) asthma. B) benign prostatic hyperplasia. D) opiate withdrawal. 8) The adrenal medulla serve to supplement the: A) somatic nervous system. C) sympathetic nervous system. D) both the sympathetic and parasympathetic systems. B) parasympathetic nervous system. 9) What neurotransmitter is released by both preganglionic and postganglionic parasympathetic neurons at their synapses? A) both epinephrine and norepinephrine C) norepinephrine B) epinephrine D) acetylcholine 10) Which of the following is NOT an effect of the parasympathetic nervous system? B) decreased heart rate D) bronchoconstriction A) constriction of the pupil C) increased sweat secretion 11) When blood is centrifuged, what is found in the buffy coat? A) leukocytes and erythrocytes B) erythrocytes and platelets

Explanation / Answer

4.

C) acetylcholine

5.

C) adrenergic

6.

A) The diameter of the respiratory passageways will increase.

7.

A) a fast heart rate

8.

C) sympathetic nervous system

9.

D) acetylcholine

10.

C) increased sweat secretion

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