Chapter 21 pt. 2

Question 1

Volume of blood flowing through a vessel, organ, or body per unit time (ml/min)

Answer 1

Blood Flow

Question 2

The force exerted on the walls of vessels by the blood(mmHg)

Answer 2

Blood Pressure

Question 3

Pressure gradient, generated by contraction of ventricles, and dependent on volume of blood

Answer 3

Blood Pressure

Question 4

Thickness of blood

Answer 4

Blood Viscosity

Question 5

Dehydration can or cannot change the relatively constant source of resistance?

Answer 5

Can change it

Question 6

As length of blood vessels increase, the resistance _______.

Answer 6

Increases

Question 7

Most important factor in determining resistance is ______ _______

Answer 7

Blood vessel diameter

Question 8

Constricts and relaxes to change blood flow and therefore not constant

Answer 8

Blood vessel diamter

Question 9

Cross sectional area is ________ at capillaries.

Answer 9

greatest

Question 10

Decreases with increase in cross sectional area.

Answer 10

Velocity of flow

Question 11

_______ depends on how much elastic arteries can be stretched, blood flow, and is not constant due to heartbeat.

Answer 11

Arterial Pressure

Question 12

Low pressure required in capillaries because __________

Answer 12

Capilaries are thin walled

Question 13

BP drops to 35-40mmHg before entering ______ and drops to 20mmHg at end

Answer 13

Capillaries

Question 14

_______ pressure is steady, pressure gradient is low, and its resistance is low.

Answer 14

Venous

Question 15

Capillary exchange involves _______, ________, and _______.

Answer 15

Diffusion, transcytosis, and bulk flow

Question 16

A decrease in BP at the arterial baroreceptors will result in an _________ in heart contractivity

Answer 16

Increase

Question 17

Movement of fluids back into capillaries due to osmotic pressure, caused by plasma proteins.

Answer 17

Reabsorption

Question 18

Movement of materials out due to BP.

Answer 18

Filtration

Question 19

As fluid leaves due to filtration, BP _______.

Answer 19

Decreases

Question 20

What 3 things can result in a change in BP?

Answer 20

Cardiac output, peripheral resistance, and blood volume.

Question 21

As blood travels from arteries to veins, pressure ________.

Answer 21

Decreases

Question 22

Blood flow to a tissue will increase if the:

Answer 22

arterioles dilate

Question 23

Factors that promote the dilation of precapillary spincters

Answer 23

Vasodilators

Question 24

The vasomotor center can control arterial BP by:

Answer 24

Making adjustments in vessel diameters.

Question 25

Responds to changes in BP

Answer 25

Barorecptor reflexes

Question 26

Monitor changes in the chemical composition of arterial blood.

Answer 26

Chemoreceptor reflexes

Question 27

Barorecptors are found in:

Answer 27

Carotid sinuses, aortic sinuses, and the wall of the right atrium.

Question 28

Responds to changes in CO, O, or pH levels in blood and cerebrospinal fluid.

Answer 28

Chemoreceptor reflexes

Question 29

Chemoreceptor reflexes are located in:

Answer 29

Carotid and aortic arch

Question 30

Released at the posterior lobe of the pituitary gland in response to a decrease in blood volume or an increase in the osmotic concentration of the plasma.

Answer 30

Antidiuretic Hormone (ADH)