Page 158 - 84 human physiolofy part-1

Chapter 8

A) Right atrium with the right ventricle and left atrium with the left ventricle
B) Right atrium with left atrium and right ventricles with left ventricle
C) Tricuspid valve and mitral valve
D) Aorta and pulmonary artery
E) Aorta, pulmonary artery and pulmonary vein

4. This is the pacemaker of the heart

A) AV node
B) Purkinje fibers
C) AV Bundle
D) SA node
E) None of these, a pacemaker is surgically inserted

5. When reading an EKG, this letter shows the depolarization from the AV node down to the AV
bundle

A) S
B) P
C) U
D) T
E) Q

6. The T wave in an EKG shows

A) Resting potential
B) Atrial depolarization
C) SA node excitation
D) Ventricle repolarization
E) Purkinje Excitation

7. Blood pressure is the measure of

A) Pressure exerted by the blood on the walls of the blood vessels
B) Pressure exerted by the blood on the arteries
C) Pressure exerted by the blood on the veins
D) Pressure exerted by the blood on the aorta

8. Systolic Pressure is

A) An average of 120 mm Hg
B) Lowers steadily during ventricle systole
C) The highest when blood is being pumped out of the left ventricle into the aorta
D) An average of 80 mm Hg
E) Both A and C
F) Both B and D

158 | Human Physiology