2.6 The Structure And Functin 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 wit centres controlling breathing, heart rate and peristalsis

Answer 16

Medulla

Question 17

Hormone and neurotransmitter

Answer 17

Nor-adrenaline (nor-epinephrine)

Question 18

Blood constraining 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 nervous tissue in the wall of the right atrium; received impulses from the medulla

Answer 21

Sino-atrial node (SAN)

Question 22

Instrument used to measure blood pressure

Answer 22

Sphygmomanometer

Question 23

Life 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 one 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 cardiac muscle is 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