Exam Questions

Question 1

Which cell type is capable of further mitosis after leaving the hemopoietic organ in which it is formed

Answer 1

Lymphocyte

Question 2

Which of the following options completes the following statement? “The right atrioventricular valve …”

Answer 2

Is prevented from everting by papillary muscles

Question 3

A 53 year-old woman is found by arteriography to have 50% narrowing of her left renal artery. What is the expected change in blood flow through the stenotic artery?

Answer 3

Decrease to 1/16

Question 4

A stethoscope placed over the left second intercostal spaced just lateral to the sternum would be best positioned to detect sounds associated with which heart valve?

Answer 4

Pulmonary

Question 5

Which structure does not lie in the coronary sulcus

Answer 5

Right marginal artery

Question 6

A patient involved in an automobile accident presents with a sharp object puncture of the middle of the sternum at about the level of the 4th or 5th costal cartilage. If the object also penetrated pericardium and heart wall, which heart chamber would most likely be damaged?

Answer 6

Right Ventricle

Question 7

the first branch of the human aorta is

Answer 7

Brachiocephalic artery

Question 8

A 23 year old male injured in an industrial explosion was found to have multiple small metal fragments in his thoracic cavity. Since the pericardium was torn inferiorly the surgeon began to explore for fragments in the pericardial sac. Slipping her hand under the heart apex, she slid her fingers upward and to the right within the sac until they were stopped by the cul-de-sac formed by the pericardial reflection near the base of the heart. Her fingers were then in the:

Answer 8

Oblique sinus

Question 9

During which phase of the ventricular action potential is the membrane closest to the K+ equilibrium potential?

Answer 9

Phase 2

Question 10

Which of the following structures will have the slowest rates of conduction of the cardiac action potential?

Answer 10

A-V bundle fibres

Question 11

Which sequence describes the systemic circulation?

Answer 11

Left Ventricle - Aorta - arteries - veins - capillaries

Question 12

Which cell has cytoplasmic granules containing factors for destruction of helminthic parasites?

Answer 12

Eosinophils

Question 13

Which statement about cardiac muscle is most accurate?

Answer 13

The strength and contraction of cardiac muscle depends on the amount of calcium surrounding cardiac myocytes

Question 14

At which site is systolic blood pressure then highest

Answer 14

Aorta

Question 15

In which phase of ventricular muscle action potential is the potassium permeability the highest?

Answer 15

Phase 3

Question 16

Which phase of the ventricular action potential coincides with diastole?

Answer 16

Phase 4

Question 17

Which chamber’s anterior wall forms most of the sternocostal surface of the heart?

Answer 17

Right ventricle

Question 18

Blood enters the systemic circuit of blood flow by passing through the

Answer 18

Aortic valve