Prince George Community College » Biology » Biology 2060 - Anatomy and Physiology II » Fall 2021

Question #1

Which of the following is incorrect about the functional properties of the heart?

A. cardic muscle cells have electrical synapse

B. The right side of the heart has less blood because it only distributes blood to the lung capillaries

C. Its intercalated disk allows it to function as an effective pump

D. It distributes oxygenated blood to the systemic tissues via branches of aorta

E. It receives deoxygenated and oxygenated blood from veins entering the heart

Question #2

The opening of the atrioventricle valves is due to pressure in the:

A. atria exceeding the pressure in the ventricles

B. ventricles exceeding the pressure in the aorta and pulmonary trunk

C. ventricles exceeding the pressure in the atria

D. atria exceeding the pressure in the aorta and pulmonary trunk

E. contractions of the papillary muscles and chordae tendinae

Question #3

Which of the following is masked or not normally apparent in an EKG waves?

A. atrial repolarization

B. atrial depolarization

C. repolarization of the papillary muscles

D. ventricular repolarization

E. ventricular depolarization

Question #4

Which of the following does not belong with the others?

A. SA node

B. AV bundle

C. AV valves

D. AV node

E. Purkinje fibers

Question #5

The T- waves on an EKG is large because it *represents ventriclular and artrial repolarization

A. FALSE

B. TRUE

Question #6

Striations are made up of actin and myosin fiilaments

A. TRUE

B. FALSE

Question #7

All of the following are true about the heart, EXCEPT:

A. the heart is housed in a cavity called the mediastinum

B. trabeculae carnea are folds in the atria and ventricles of the heart

C. EKG represents the electrical and mechanical events of cardic contractions

D. myocardium is the thick muscular layer of the heart