2/27- Blood Pressure (Exam 2)

Question 1

What is preload?

Answer 1

Stretching affect of the left ventricle because blood was left that didn’t leave and then refilled and stretched left ventricle

Question 2

What stretches the left ventricle and then what happens?

Answer 2

Sarcomeres

After stretched they come together harder to contract

Question 3

What is the first difference between bainbridge reflex and frank starling?

Answer 3

Bainbridge- right atrium only

Frank- left ventricle only

Question 4

What is the second difference between Bainbridge and frank starling?

Answer 4

Bainbridge- heart responds by beating faster

Frank- the contractions of heart are stronger

Question 5

What is the last difference between Bainbridge and frank starling?

Answer 5

Bainbridge- reflex set off by stretch receptors

Frank- has to do with way sarcomeres are built

Question 6

What is blood pressure?

Answer 6

Pressure of blood in the arteries of the systemic circuit (body)

Question 7

What are the 4 factors that affect blood pressure?

Answer 7

1) cardiac output- CO up, pressure up
2) peripheral resistance
3) blood volume
4) blood viscosity

Question 8

What are the 2 out of the 4 the body controls?

Answer 8

1) cardiac output

2) peripheral resistance

Question 9

What is a lumen of a vessel?

Answer 9

The hollow interior

Question 11

What is vasodilation?

Answer 11

Relax smooth muscle lumen will widen

Lowers blood pressure

Question 12

What’s in the medulla oblongata for blood pressure?

Answer 12

Vasomotor center

Question 13

What does the vasomotor center do?

Answer 13

Wired to blood vessels controlling the diameter

Autonomic innervation

Can command vasoconstriction

Question 14

What connection do blood vessels have?

Answer 14

Sympathetic

Question 15

What happens if you need vasodilation?

Answer 15

Vasomotor center cuts all ties of sympathetic connection and hopes the vessels dilate

Question 16

What is blood volume?

Answer 16

More blood in vessels higher pressure

Less blood lower pressure

Question 17

What can affect blood volume?

Answer 17

Hemorrhage- ant bleeding (decrease blood volume)

Question 18

What do people with hypertension have to stay away from and why?

Answer 18

Salt

Needs water to dilute salt
Stays in blood vessels
Higher blood volume= higher blood pressure

Question 19

What is viscosity and how is it in our bodies?

Answer 19

Ease with which a liquid will flow

Fairly stable

Question 20

What is vasoconstriction?

Answer 20

Narrow diameter of lumen by contracting smooth muscle

Increases blood pressure

Question 21

What happens if you have high viscosity?

Answer 21

Blood pressure raises

Harder to push through vessels so pressure goes up

Question 22

What happens with low viscosity?

Answer 22

Blood pressure decreases

Question 23

What are both cardiac control center and vasomotor center connected too?

Answer 23

Baroreceptors and chemoreceptors

Question 24

What is the radial artery?

Answer 24

Used to get blood pressure by sticking a probe in it

Question 25

What is the sphygmomanometer?

Answer 25

Blood pressure cuff

Used with stethoscope

Gets 2 readings-

1) left ventricle contracts (raise to max)
2) left ventricle relaxes (drops to min)

Question 26

If blood pressure changes what control center gets notified?

Answer 26

Both