Circulation

Question 1

Where is the vasomotor center located?

Answer 1

reticular formation of the medulla and caudal pons

Question 2

Where is the vasoconstrictor (C1) area of the vasomotor center? What are its outputs?

Answer 2

anterolateral upper medulla

relays NE to the spinal cord

Question 3

Where is the vasodilator (A1) area of the vasomotor center? What are its outputs?

Answer 3

anterolateral lower medulla

projects to vasoconstrictor area to inhibit it

Question 4

Where is the sensory (A2) area of the vasomotor center? What are its inputs?

Answer 4

located in the tractus solitarius in the posterolateral pons and medulla

received input from CN IX and X

Question 5

The medial vasomotor center relays ______ output to the heart while the lateral relays ______ output.

Answer 5

parasympathetic

sympathetic

Question 6

Stretching the carotid sinus stimulates what nerve?

Answer 6

Hering’s nerve (CN IX)

Question 7

Where does Hering’s nerve synapse onto?

Answer 7

solitary tract which eventually proceeds to the sensory area of the vasomotor center

Question 8

Stretching of the aorta causes stimulation of which nerve?

Answer 8

vagus nerve which eventually synapses onto the solitary tract

Question 9

Which part of the hypothalamus detects serum osmolarity?

Answer 9

anteroventral third ventricular region (AV-3V)

Question 10

What composes the AV-3V of the hypothalamus?

Answer 10

superior: subforniceal organ
inferior: organ vasculosum of the lamina terminalis

In between: median preoptic nucleus