Blood Vessels

Question 1

The Tunica Intima of an artery includes the _____ and an _______, and is the ______ layer.

Answer 1

endothelium, internal elastic membrane

Question 2

The tunica ____ is the middle layer of blood vessels and contains smooth muscle.

Answer 2

Media

Question 3

The tunica media of an artery contains the ______ and _______ membranes.

Answer 3

internal and external elastic

Question 4

The tunica ______ is the outer layer of the blood vessel.

Answer 4

adventitia.

Question 5

The tunica adventitia in an artery consists of ______ tissue.

Answer 5

collagen fiber connective tissue.

Question 6

The three type of arteries are:

Answer 6

Elastic arteries, muscular arteries, arterioles

Question 7

The smallest blood vessels in the body

Answer 7

capillaries

Question 8

Capillaries contain only the tunica _____.

Answer 8

interna

Question 9

Capillaries are made of an endothelium or ________ epithelium and ________.

Answer 9

simple squamous and basement membrane

Question 10

These regulate blood flow to the capillaries .

Answer 10

Pre-capillary sphincters

Question 11

Pre-capillary sphincters are controlled by _______ nerves.

Answer 11

Sympathetic

Question 12

_______ nerves control the distribution of blood to an organ.

Answer 12

Sympathetic

Question 13

About _____ % of blood volume is found in the _____.

Answer 13

Veins

Question 14

Veins have a _______ tuinca media than arteries.

Answer 14

Thinner

Question 15

Two largest veins in the body:

Answer 15

Superior and inferior vena cava

Question 16

Four types of veins

Answer 16

Large, medium, small and venules

Question 17

When two blood vessels having seperate origins unite.

Answer 17

anastomosis

Question 18

Provides an alternate source blood supply to an organ when a blood vessel is damaged or blocked.

Answer 18

anastomosis

Question 19

Anastomosis is more common in the _____ circulation and ____ common in the arterial blood circulation.

Answer 19

More, Less

Question 20

The force exerted on wall of blood vessels because of contraction of the ventricles.

Answer 20

Blood pressure

Question 21

Instrument for blood pressure measurement

Answer 21

Sphygmomanometer

Question 22

The highest arterial pressure measured during ventricular systole

Answer 22

Systolic pressure

Question 23

The lowest arterial pressure measured during ventricular diastole

Answer 23

diastolic pressure

Question 24

Factors affecting blood pressure

Answer 24

cardiac output, blood volume, peripheral resistance, age, vessel diameter

Question 25

The higest blood pressure is measured in the _____ at about ____ mmHg, and the lowest blood pressure is measured in the superior and inferior vena cava at about _____ mmHg.

Answer 25

aorta, 120/ vena cava 0-5

Question 26

Blood pressure within the capillaries is about _____ mmHg.

Answer 26

30

Question 27

Sympathetic nerve fiber stimulation of small blood vessels (arterioles) cause \_\_\_\_\_\_\_\_.

Answer 27

vasoconstriction

Question 28

Respond to the degree of stretch and regulate blood pressure:

Answer 28

baroreceptors

Question 29

\_\_\_\_\_\_\_\_ regulate blood pressure by acting as sensors in the aorta and other big arteriers.

Answer 29

Chemoreceptors

Question 30

There are ____ veins than arteries.

Answer 30

more

Question 31

Paired ______ arteries combine to form ______ artery on pons.

Answer 31

vertebral, basilar

Question 32

the anastomosis of the basilar and internal carotid arteries forms the \_\_\_\_\_\_.

Answer 32

Circle of Willis

Question 33

The brain is supplied by these two pairs of arteries:

Answer 33

two internal carotid arteries and two vertebral arteries

Question 34

The cirle of willis forms around the location of the ______ \_\_\_\_\_\_.

Answer 34

Pituitary gland.