Cvs 3 - Part 1

Question 1

• Blood filters out through the?

Answer 1

Capillaries

Question 2

• Arteries and veins have 3 tunics called

Answer 2

Tunica media

Tunica interna

Tunica externa

Question 3

Tunica interna structure

Answer 3

covered with endothelium, SIMPLE squamous epithelium

Question 4

Tunica interna function

Answer 4

allows for the diffusion of materials

Question 5

Tunica media structure

Answer 5

Smooth muscle and elastic fiber layer,

Question 6

Tunica media function

Regulated by?

Answer 6

controls vasoconstriction of the vessels

regulated by the sympathetic nervous system;

Question 7

Tunica externa structure

Answer 7

Collagen fibers

Question 8

Tunica externa function?

Answer 8

protect and reinforce vessels

Question 9

Elastic arteries 2 main characteristics

Answer 9

• Elastic arteries are the largest arteries; have a lot of elastic in their TUNICA MEDIA;

Question 10

Elastic arteries function

Answer 10

they create a tightness in the walls of the arteries that maintain blood pressure

Question 11

Muscular arteries function

Answer 11

Supply the organs of the body

Question 12

Human blood pressure is only significant in the _______ of the body, but very insignificant in the _______.

Answer 12

Arteries

Veins

Question 13

Muscular (medium) arteries characteristic

Answer 13

tunica media contains most amount of smooth muscle

Hence why they are called muscular arteries

Question 14

Arterioles

Answer 14

Smallest arteries in the body

Question 15

Alpha 1 Adrenergic Receptor found in the

Answer 15

smooth muscle of the Tunica Media of the arteries

Question 16

What happens when Alpha 1 Adrenergic Receptor is stimulated

Which leads to?

Answer 16

increases the availability of calcium within the smooth muscle

leads to smooth muscle contraction and vasoconstriction

Question 17

Vasoconstriction

Answer 17

When the diameter of the blood vessel reduces

Question 18

Blood pressure =

Answer 18

Cardiac output (C.O) × Peripheral Resistance (P.R

Question 19

Systemic Peripheral Resistance –

Answer 19

measures the total peripheral resistance

Question 20

Vasodilation

What is it?

Why does it happen?

Answer 20

– where the diameter of the blood vessels increases because of a drop in the systemic peripheral resistance

Question 21

When does vasodilation occur

Answer 21

when medications block the alpha 1 receptors or calcium channels in the smooth muscle

Question 22

Cardiac output =

Answer 22

• Cardiac Output = Stroke Volume × Heart Rate (normal should be about 5 liters)

Question 23

All of your body’s blood is recycled throughout the body by the heart every minute

Answer 23

K

Question 24

What is the blood pressure in the large veins as they pour the blood into the heart?

Answer 24

Zero

There is no pump that pumps the blood in the veins, the blood is moved in one direction only towards the heart because of the presence of valves

Question 25

• Blood brings what two major things to the body?

Answer 25

Oxygen and glucose