Systemic Circulation

Question 1

Endothelial cells

Answer 1

have direct contact with blood

capillaries made from

Question 2

elastic tissue

Answer 2

what aorta made up of like a rubber band

Question 3

Vascular smooth muscle cells

Answer 3

constrict and relax(less resistance) around blood vessels

Artery’s arterioles and sphincters

Question 4

Fibrous Tissues

Answer 4

Mainly composed of collagen give rigidity to blood vessels

Question 5

What is compliance?

Answer 5

ability of blood vessels to undergo deformation.
C= change in volume/ change in pressure
the greater the compliance the easier the vessel can be streched

Question 6

Peak aortic pressure is called

Answer 6

Systolic pressure it is the top number in bp reading

Question 7

Diastolic pressure is…

Answer 7

the reading right before ventricular contraction

Question 8

What is pulse pressure?

Answer 8

difference between Sp and DP

PP=sp-dp

Question 9

Mean Arterial pressure =MAP

Answer 9

MAP= DP + (PP/3)

Question 10

What is peripheral runoff?

Answer 10

when blood leaves the arterial side and enters capillaries and veins

Question 11

WHat is the first sound you hear

Answer 11

1st is systolic

Question 12

what is the second heart sound

Answer 12

diastolic pressure

Question 13

When constricted what do vascular smooth muscles do

Answer 13

they produce frictional resistance to blood flow and prevents the blood from flowing which is caused by the constriction

Question 14

MAP relationship to CO and TPR

Answer 14

MAP= CO X TPR
MAP= (HRXSV) X TPR

Question 15

What happens during ventricular diastole?

Answer 15

The “pump” is off so there is no more blood flowing into the aorta … blood will still flow to resistance vessels because of the stored energy in the aorta walls

Question 16

What happens during Ventricular systole

Answer 16

volume and pressure is added to the aorta and blood flows to resistance vessels–> capillaries and continues to flow through the veins back through venous return

Question 17

What is hydrostatic pressur?

Answer 17

Blood pressure increases linearly

Question 18

when laying down pressure mainly in thoracolumbar region what happens if you stand up?

Answer 18

blood flows to lower extremities.

Question 19

Alpha adrenergic receptors cause

Answer 19

Vasoconstriction which increases resistance and increases MAP

Question 20

Muscarinic receptors cause?

Answer 20

vasodilation which decreases resistance and decreases MAP