ex phys test 3

Question 1

what does the respiratory system do?

Answer 1

adds oxygen and removes carbon dioxide from the blood.

Question 2

what does the circulatory system do?

Answer 2

responsible for the delivery of oxygenated blood and nutrients to tissues for their needs.

Question 3

cardiac output

Answer 3

increased amount of blood pumped per minute by the heart.

Question 4

blood travels away from the heart in __ and returns to the heart via __.

Answer 4

arteries, veins.

Question 5

__ branches so they form __, which develops into much smaller vessels called __.

Answer 5

Arteries, arterioles, capillaries.

Question 6

The smallest and most numerous of blood vessels.

Answer 6

capillaries

Question 7

Where exchange of oxygen, carbon dioxide, and nutrients between tissues and the circulatory system occur across what?

Answer 7

capillaire beds

Question 8

Blood passes from ___ to small venous vessels called___ (direct blood back toward the heart, they increase in size and becomes veins).

Answer 8

capillary beds, venules

Question 9

what is the mixture of blood from both the upper and lower body that accumulates in the right side of the heart?

Answer 9

mixed venous blood

Question 10

what prevents mixing of blood from the two sides of the heart?

Answer 10

Interventricular septum

Question 11

The wall of the heart is composed of 3 layers, what are they called?

Answer 11

Epicardium, myocardium, endocardium

Question 12

What is the myocardium responsible for?
And from where does it receive its blood supply?

Answer 12

Contracting and forcing blood out of the heart. Via the right and left coronary arteries.

Question 13

what is the contraction phase?

Answer 13

Systole

Question 14

Atrial contraction that occurs during ventricular diastole?

Answer 14

Systole

Question 15

What is the relaxation phase?

Answer 15

Diastole

Question 16

Atrial relaxation occurs during ventricular systole?

Answer 16

Diastole

Question 17

With an increase in exercise to heavy exercise, there is a reduction in the time spent in what? diastole or systole?

Answer 17

Both

Question 18

what is the normal blood pressure of an adult male and female?

Answer 18

Male = 120/80
Female = 110/70
120 and 110 systolic
70 and 80 diastolic

Question 19

The pressure generated as blood is ejected from the heart during ventricular systole

Answer 19

Systolic blood pressure

Question 20

Ventricular relaxation, where the arterial blood pressure decreases

Answer 20

Diastolic blood pressure

Question 21

What determines the rate of blood flow through the systematic circuit?

Answer 21

Mean arterial blood pressure

Question 22

Mean arterial pressure calculation

Answer 22

cardiac output x total vascular resistance

Question 23

Pacemaker of the heart.
Spontaneous electrical activity in the ___ occurs due to a decay of the resting membrane potential via the inward diffusion of sodium during diastole.

Answer 23

SA node

Question 24

Relays on the electrical depolarization signal to the ventricles by a pair of conductive pathways called the right and left bundle branches.

Answer 24

AV node

Question 25

Depolarization of atria

Answer 25

P wave

Question 26

depolarization of the ventricles, occurs at the beginning of the systole.

Answer 26

QRS complex

Question 27

result of ventricular repolarization, occurs at the beginning of the diastole

Answer 27

T wave

Question 28

The product of the heart rate and the stroke volume, it can be increased due to a rise in either heart rate or stroke volume

Answer 28

Cardiac Output