Spasm of digital vessels in the hands in response to cold (Raynaud’* phenomenon) may be relieved by

Question 1

A. Cutting sympathetic nerves to the hand.

B. Stimulating parasympathetic nerves to the hand.

C. Alpha (α) adrenoceptor blockade.

D. Beta (β) adrenoceptor agonists.

E. Wearing gloves.

Question 2

A. True Sympathetic nerves to digital vessels are tonic vasoconstrictor nerves.

B. False The hand does not have a parasympathetic nerve supply.

C. True Alpha receptors mediate sympathetic vasoconstriction.

D. False Digital vessels have few beta receptors.

E. False Raynaud’* phenomenon is triggered by cold and wearing gloves may prevent cooling to the threshold temperature.

kratos · Answer 1 · 2020-03-09T00:22:10+0000

A. True Sympathetic nerves to digital vessels are tonic vasoconstrictor nerves.

B. False The hand does not have a parasympathetic nerve supply.

C. True Alpha receptors mediate sympathetic vasoconstriction.

D. False Digital vessels have few beta receptors.

E. False Raynaud’* phenomenon is triggered by cold and wearing gloves may prevent cooling to the threshold temperature.

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