Question

5.Which are unpaired arteries?
a: Superior phrenic

b: Renal

c: Celiac trunk

d: Superior mesenteric

e: Inferior mesenteric

f: Inferior phrenic

g: Vertebral

Group of answer choices

b, c, d

d, e, g

a, b, f

b, c, d, g

c, d, e

6.Which of the following vessels carries deoxygenated blood TO the liver?

Group of answer choices

hepatic portal vein

common hepatic artery

hepatic veins

renal arteries

7.A network of small arteries called the ___________ provides a blood supply to the tunica externa of very large vessels.

Group of answer choices

distributing arteries

thoroughfare channels

vasa vasorum

companion vessels

fenestrated capillaries

8.As a venous pathway moves closer to the heart, the veins ____.

Group of answer choices

get larger

get smaller

No answer text provided.

show no change in their lumen size

9.Blood directly enters the superior vena cava from the _____.

Group of answer choices

common iliac veins

brachiocephalic veins

inferior vena cava

axillary veins

10.Blood pressure is lowest in ____.

Group of answer choices

veins

arteries

venules

capillaries

arterioles

11.Which heart chambers pump deoxygenated blood?

Group of answer choices

Right atrium and right ventricle

Right atrium and left ventricle

Left atrium and left ventricle

Left atrium and right atrium

Left ventricle and right ventricle

12.The coronary sinus drains directly into the right atrium.

Group of answer choices

True

False

13.Which action causes the closure of the right atrioventricular valve?

Group of answer choices

ontraction of the right atrium

Contraction of the right ventricle

Contraction of the left atrium

None of these answers is correct

Contraction of the left ventricle

Answer 1

Answer 5: c,d,e

Celiac trunk, superior mesenteric and inferior mesenteric arteries are unpaired.

Answer 6: Hepatic portal vein

It carries deoxygenated or venous blood from various organs like small intesine,pancreas,spleen etc. to the liver for the metabolism of nutrients.

Answer 7: Vasa vasorum

Vasa vasorum is a network of small arteries that supply blood to the tunica externa layer of walls of large blood vessels.

Answer 8: Get larger

As the blood vessels that carry venous blood towards heart, their lumen size increases.Venules combine to form veins and then veins combine to form vena cava that opens into the right atrium of heart.

Answer 9: Brachiocephalic veins

Since the superior vena cava is formed by the joining of left and right brachiocephalic veins, it recieves blood from brachiocephalic veins.

Answer 10: Veins

The lowest pressure is inside the veins because they have very thin walls.

Answer 11: Right atrium and right ventricle

Right atrium receives deoxygenated blood from vena cava and pump in to the right ventricle.Right ventricle pump the deoxygenated blood received from right atrium into the lungs for oxygenation.

Answer 12: True

Coronary sinus, a vein formed by the collection of small veins carries blood from the heart wall and opens directly into the right atrium of heart.

Answer 13: Contraction of right ventricle

Atrioventricular valve get closed when the pressure inside the right ventricle is incresed when it contract to deliver the blood into the lungs.