QuestionSBA
QuestionChoice
This is correct. Nitric oxide reduces the levels of Ca2+ in smooth muscle cells, causing relaxation and hence vasodilation.
10026290
a
Nitric oxide
QuestionChoice
This is incorrect. Cold temperature results in vasoconstriction to conserve body heat by reducing the volume of blood reaching the skin.
10026294
e
Cold temperature
QuestionChoice
This is incorrect. Endothelins do the reverse of nitric oxide. They increase the level of Ca2+ in smooth muscle cells, causing them to contract, resulting in vasoconstriction
10026291
b
Endothelin
QuestionChoice
This is incorrect. Sympathetic nervous system activation is part of the 'fight or flight' response and causes vasoconstriction via the action of the noradrenaline neurotransmitter.
10026293
d
Sympathetic nervous system activation
QuestionChoice
This is incorrect. Angiotensin II is a vasoconstriction released as part of the renin-angiotensin-aldosterone system to increase blood pressure.
10026292
c
Angiotensin II
Concept
Chapter
2693
3809
Structure and physiology of blood vessels
Topic
159
Cardiovascular physiology
17656
Which of the following results in vasodilation of blood vessels?
a