Circulatory System

Question 1

What type of cell lines the natural free surfaces of BV & the interior of the heart?

Answer 1

Endothelial

Question 2

What heart wall layer is mostly closely associated w/ pericardium?

Answer 2

Epicardium

Question 3

What is the cell that lies close to the endothelium, contains actin & myosin & has contractile ability?

Answer 3

Pericyte

Question 4

What type of BV has a thin wall compared to its lumen?

Answer 4

Vein

Question 5

What is the name of the membrane closely associated w/ tunica intima?

Answer 5

External Elastic Membrane

Question 6

What do capillaries lack that artieries& veins possess in their walls?

Answer 6

Smooth muscles

Question 7

What structure is located in the R-atrium?

Answer 7

SA node

Question 8

What is the innermost layer of blood vessels?

Answer 8

Tunica intima

Question 9

The release of what substance during clot formation stimulates smooth muscles in arteries to contract?

Answer 9

Thromboxane A2

Question 10

A sinusoid is a type of what structure?

Answer 10

Capillary

Question 11

What is the name for the small blood vessels in the walls of blood vessels?

Answer 11

Vasa Vasorum

Question 12

What structure in the kidney contains fenestrated capillaries?

Answer 12

Glomerulus

Question 13

What BV is heavily invested w/ elastic fibers?

Answer 13

Aorta

Question 14

What type of capillary is simple an epithelial tube w/ no basal lamina?

Answer 14

Lymphatic

Question 15

What layer of the heart wall contains the most cardiac muscle?

Answer 15

Myocardium

Question 16

What layer of the vessel wall contains primary longitudinally arranged collagen fibers &nervivascularis?

Answer 16

Tunica Adventitia

Question 17

Where is von Willebrand factor stored in the endothelial cell?

Answer 17

Weibel-palade bodies

Question 18

What type of artery is the aorta?

Answer 18

Elastic Artery

Question 19

What major BV has a poorly developed tunica media & a thick tunica adventitia rich in elastic fibers?

Answer 19

Vena Cava

Question 20

What BV controls blood flow into a capillary?

Answer 20

Arteriole

Question 21

What is the pacemaker of the heart?

Answer 21

SA node

Question 22

Prominent inner & outer elastic membrane are criteria for what type of vessels?

Answer 22

Muscular Artery

Question 23

What is the DCT that comprises the skeleton of the heart?

Answer 23

Annuli fibrosis

Question 24

What type of BV is found in endocrine glans & tissues where absorption is occurring?

Answer 24

Fenestrated capillaries

Question 25

What glycoprotein factor is part of the clotting mechanism?

Answer 25

Von Wilberbrand factor

Question 26

What layer of the wall of a large vein is most prominent?

Answer 26

Tunica adventitia

Question 27

What type of fiber is observed in abundance among the smooth muscle fibers of the tunica media of the aorta?

Answer 27

Elastic Fibers

Question 28

What layer of the heart contains endothelium?

Answer 28

Endocardium

Question 29

Sinusoidal capillaries are seen in the spleen, liver, & in what specific part of what other organ?

Answer 29

Adenohypophysis / ant. pituitary

Question 30

What membrane is associated w/ tunica intima?

Answer 30

Internal Elastic Membrane

Question 31

What type of BV has a thick wall compared to its lumen?

Answer 31

Artery

Question 32

What type of tissue comprises the annuli fibrosi?

Answer 32

Connective tissue

Question 33

In general, what do veins have that arteries don’t?

Answer 33

Valves

Question 34

What chemical is released from nerve fibers that cause arterial constriction?

Answer 34

Norepinephrine

Question 35

What layer of the artery wall is the thickest?

Answer 35

Tunica Media

Question 36

In general, in large vessels, where are the vasa vasora located?

Answer 36

Tunica Adventitia

Question 37

What type of cell lines the external surface of the heart?

Answer 37

Mesothelial