The Structure and Function of the Heart

Question 1

Cardiac output is the

Answer 1

volume of blood pumped through each ventricle per minute

Question 2

Cardiac output can be calculated in the following way:

Answer 2

CO = HR x SV

Question 3

The left and right ventricles pump the same volume of blood through the

Answer 3

aorta and pulmonary artery.

Question 4

During diastole, the blood returns to the atria and flows into the

Answer 4

ventricles

Question 5

During atrial systole, the remaining blood flows through the AV valves into the

Answer 5

ventricles

Question 6

During ventricular systole the AV valves close and the semi lunar valves open to allow

Answer 6

blood to pump out of the aorta and pulmonary artery

Question 7

The pacemaker of the heart is known as the

Answer 7

SAN (Sino-atrial node)

Question 8

The SAN is located in the wall of the

Answer 8

right atrium

Question 9

Impulses from the SAN spread through the

Answer 9

atria (and cause atrial systole)

Question 10

Impulses travel from the atria to the AVN (atrio-ventricular node) and go

Answer 10

DOWN the central wall of the heart and up through the ventricle walls (causing ventricular systole)

Question 11

An ECG detects

Answer 11

impulses in the heart

Question 12

The SAN can be regulated by the

Answer 12

medulla

Question 13

A sympathetic nerve releases

Answer 13

noradrenanline

Question 14

Noradrenaline causes the heart rate to

Answer 14

increase

Question 15

A parasympathetic nerve releases

Answer 15

acetylcholine

Question 16

Acetylcholine causes the heart rate to

Answer 16

decrease

Question 17

Blood pressure is measured using a

Answer 17

sphygmomanometer

Question 18

Blood pressure increases during

Answer 18

ventricular systole

Question 19

Blood pressure decreases during

Answer 19

diastole

Question 20

A typical blood pressure reading is

Answer 20

120/80mmHg

first number = systolic , second number = diastolic

Question 21

High blood pressure is known as

Answer 21

Hypertension