LAB FINAL EXTENDED

Question 1

Negative feedback loop for blood pressure:

Answer 1

Stimulus: Increase in BP
Sensor: Baroreceptors in aortic arch and carotid sinus
Integrator: Medulla oblonga
Effector: Heart + arteries
Response: Decrease in cardiac output + vasodilate to decrease resistance
Result: Decrease in BP

Question 2

Why is MAP important to know regarding patient care?

Answer 2

MAP shows the pressure of the aorta

Question 3

MAP calculation:

Answer 3

MAP= DP+ 1/3 (SP-DP)

Question 4

Blood pressure is highest when:

Answer 4

Lying down

Question 5

Heart rate is highest when:

Answer 5

Standing up

Question 6

Blood glucose positive homeostatic feedback loop:

Answer 6

Stimulus: Decrease in blood glucose
Sensor/integrator: Alpha cells in Islets of Langerhans
-releases glucagon-
Effector: Liver and skeletal muscle
Response: Liver breaks down glycogen to glucose
Result: Increase in blood glucose

Question 7

Epi + nor epi responsible for:

Answer 7

Increasing HR and BP

Question 8

aCH responsible for:

Answer 8

Decreasing HR and BP

Question 9

How to calculate CO:

Answer 9

CO= SV x HR