Unit 5

Question 1

What is the correct order of events during pulmonary circulation?

Answer 1

Systemic veins - superior and inferior vena cavae - pulmonary trunk - pumonary artery - lungs - 4 pumonary veins - left atrium

Question 2

T/F

The SA node initiates rate rate by sending impulses to the AV node

Answer 2

TRUE

Question 3

What is the correct order of events during systemic circulation?

Answer 3

Left ventricle - Aorta - all tissues in the body

Question 4

T/F

The superior mesenteric artery branches off the aortic arch

Answer 4

FALSE

The brachiocephalic, left common carotid and left subclavian arteries branch off of the aortic arch.

Question 5

T/F

The bicuspid valve is open when the atria are contracting

Answer 5

TRUE

blood travels from the left atrium to the left ventricle, the bicuspid or mitral valve opens

Question 6

T/F

Type AB blood is the unversal donor blood as it does not contain any antigens.

Answer 6

FALSE

Type O is the univesal donor blood as it does not contain any antigens

Question 7

T/F

The thickest myocardial layer of the heart is located in the left ventricle.

Answer 7

TRUE

The left ventricle pumps the blood to our body, requiring the greaetest force, and thus more muscle (myocardium is the layer of the heart containing cardiac muscle)

Question 8

T/F

The fibrous pericardium is also called the epicardium of the heart

Answer 8

FALSE

the visceral pericardium (part of the serous pericardium) is also called the epicardium

Question 9

T/F

The four pulmonary arteries enter the left atrium

Answer 9

FALSE

the four pulmonary veins enter the left and right atrium (two on each side)

Question 10

T/F

Platelets play an important role in the immune response and in chronic infection

Answer 10

FALSE

Platelets play an important role in the clotting process and in decreasing blood loss when blood vessels are damaged