Wk 6 - LE 11: Cardiovascular (regulating BP in exercise)

Question 1

High blood pressure in large arteries is linked to _____ contraction

Answer 1

ventricular

Question 2

Does blood pressure oscillate or remain constant in the arterial circulation?

Answer 2

Oscillates

Question 3

Blood pressure falls considerably within what vessels?

Answer 3

The resistance vessels (capillaries & venules -> microcirculation)

Question 4

Systole is when the heart ______

Answer 4

Contracts

Question 5

Diastole is when the heart __

Answer 5

Relaxes

Question 6

Why do the pulmonary and systemic circuits have such great pressure difference when the same amount of blood flows through both?

Answer 6

The resistance (and pressure) is lower in the pulmonary circuit

Question 7

The heart spends more time in _____ than it does in ______

Answer 7

diastole, systole

Question 8

Is your heart rate ever constant?

Answer 8

No, it constantly varies

Question 9

Does BP increase or decrease with age?

Answer 9

BP increases (due to stiffening of arteries)

Question 10

Peak BP in training is affected by training level of the individual (T/F)

Answer 10

FALSE. It is NOT affected

Question 11

Peak BP takes longer to achieve in trained people (T/F)

Answer 11

TRUE

Question 12

Theres about a ____% increase in MAP in max exercise

Answer 12

30%

Question 13

The pulse pressure is the difference between….

Answer 13

The systolic and diastolic pressures

Question 14

Is the blood pressure constant throughout the systemic circuit?

Answer 14

No

Question 15

Changes in resistance cause changes in ____

Answer 15

cause

Question 16

Changes in flow and resistance cause changes in _______

Answer 16

pressure

Question 17

If volume increases, _____ will increase

Answer 17

pressure

Question 18

MAP = _____ x _____

Answer 18

MAP = CO x TPR

Question 19

MAP varies considerably (T/F)

Answer 19

False

Question 20

CO and TPR can vary considerably (T/F)

Answer 20

True (they are the controlled variables)

Question 21

The cardiovascular system restores blood pressure to its set-point when it alters suddenly. What is this called?

Answer 21

A baroreflex ( or arterial baroreceptor reflex)

Question 22

Baroreceptors are located in the ….?

Answer 22

Aorta and carotid artery (most important)

Question 23

Sensing: If blood pressure falls nerve fire will ______ frequency to brainstem

Answer 23

increase

Question 24

Sensing: If blood pressure increases nerve fire will ______ frequency to brainstem

Answer 24

decrease

Question 25

Adjusting: If blood pressure falls nerve fire will ______ frequency AWAY from brainstem to body

Answer 25

increase

Question 26

Adjusting: If blood pressure is high nerve fire will ______ frequency AWAY from brainstem to body

Answer 26

decrease

Question 27

When does the baroreflex operate?

Answer 27

All the time