2.6 - The Structure And Function Of The Heart

Question 1

Neurotransmitter released by parasympathetic nerve fibres.

Answer 1

Acetylcholine

Question 2

Opposing actions of the sympathetic and parasympathetic systems.

Answer 2

Antagonistic

Question 3

Part of the cardiac cycle in which the heart muscle of the atria relaxes.

Answer 3

Atrial diastole

Question 4

Part of the cardiac cycle in which the heart muscle of the Atria contracts.

Answer 4

Atrial systole

Question 5

Nervous tissue found at the junction between the atria and the ventricles.

Answer 5

Atrio-ventricular node (AVN)

Question 6

Heart valve found between the atria and the ventricles.

Answer 6

Atrio-ventricular(AV) valve

Question 7

Controls involuntary action of smooth and cardiac muscle and glands.

Answer 7

Autonomic nervous system (ANS)

Question 8

Contraction and relaxation of the heart muscle in a heartbeat.

Answer 8

Cardiac cycle

Question 9

Muscle that makes up the heart walls.

Answer 9

Cardiac muscle

Question 10

Volume of blood expelled from one ventricle of the heart per minute.

Answer 10

Cardiac output

Question 11

Condition caused by blockage of coronary arteries.

Answer 11

Coronary heart disease (CHD)

Question 12

Blood, usually in veins; that carries little oxygen.

Answer 12

Deoxygenated blood

Question 13

Part of the cardiac cycle during which cardiac muscle is relaxed.

Answer 13

Diastole

Question 14

Record of electrical activity in the heart; used to detect abnormalities.

Answer 14

Electrocardiogram (ECG)

Question 15

Abnormally high blood pressure in arteries.

Answer 15

Hypertension

Question 16

Part of the brain with centres controlling breathing, heart rate and peristalsis.

Answer 16

Medulla

Question 17

Hormone and neurotransmitter.

Answer 17

Nor-adrenaline (nor-epinephrine)

Question 18

Blood containing a high level of oxygen.

Answer 18

Oxygenated blood

Question 19

Nerve fibres which result in a decrease in heart rate; part of the autonomic nervous system (ANS).

Answer 19

Parasympathetic nerves to the heart

Question 20

Valves leading into the main arteries leaving the heart.

Answer 20

Semi-lunar valves

Question 21

Region of the nervous tissue in the wall of the rugby atrium; receives impulses from the medulla.

Answer 21

Sino-atrial node (SAN)

Question 22

Instrument used to measure blood pressure.

Answer 22

Sphygmomanometer

Question 23

Like threatening condition that occurs when blood supply to part of the brain is cut off.

Answer 23

Stroke

Question 24

Volume of blood expelled from the left ventricle during on cardiac cycle.

Answer 24

Stroke volume

Question 25

Nerve fibre that stimulates an increase in heart rate; part of the autonomic nervous system (ANS).

Answer 25

Sympathetic accelerator nerve

Question 26

Part of the cardiac cycle in which the cardiac muscle in contracted.

Answer 26

Systole

Question 27

Part of the cardiac cycle in which the cardiac muscle of the ventricles relaxes.

Answer 27

Ventricular diastole

Question 28

Part of the cardiac cycle in which the cardiac muscle of the ventricles contracts.

Answer 28

Ventricular systole