A3 Cardiovascular system

Question 1

How many chambers are there in the heart?

Answer 1

4

Question 2

Name the structure labelled X

Answer 2

Coronary artery

Question 3

Name the chamber labelled S

Answer 3

Right atrium

Question 4

Name the structure labelled R

Answer 4

Right ventricle

Question 5

Name the structure labelled P

Answer 5

Left atrium

Question 6

Does chamber Q contain oxygenated or deoxygenated blood?

Answer 6

Oxygenated

Question 7

Name the structure labelled X

Answer 7

Coronary artery

Question 8

Name the blood vessel labelled C

Answer 8

Aorta

Question 9

Name the blood vessel labelled B

Answer 9

Pulmonary vein

Question 10

Name the blood vessel that returns blood from the body to the heart

Answer 10

Vena cava

Question 11

Name blood vessel A

Answer 11

Pulmonary artery

Question 12

Name the valve

Answer 12

Semi lunar valve

Question 13

Name the valve labelled B

Answer 13

Bicuspid valve

Question 14

Name the blood vessel labelled C

Answer 14

Aorta

Question 15

Name the structure labelled D

Answer 15

Tricuspid valve

Question 16

In which chamber is the SAN found?

Answer 16

Right atrium

Question 17

What is the role of the SAN?

Answer 17

Acts as pacemaker

Initiates an electrical wave across the atria

Question 18

List the structures involved in causing the cardiac muscle to contract

Answer 18

Sino atrial node

Atria walls

Atrioventricular mode

Bundle of His

Purkinjie fibres

Question 19

What happens when a electrical wave passes over the atria?

Answer 19

Cardiac muscle in atria walls contract

Increase presume in atria

Valve opens

Blood passes into ventricles

Question 20

What does myogenic mean?

Answer 20

Cardiac muscle contracts

without the control of the nervous system

Question 21

What is the role of the AVN?

Answer 21

Initiates an electrical impulse that travels down the Bindle of His to the purkinjie fibres

Causes ventricles to contract from the apex upwards

Question 22

What happens to the pressure in the ventricles when the walls contract?

Answer 22

Pressure increases

Question 23

When do the semi lunar valves open?

Answer 23

When the pressure in the ventricles exceeds the pressure in the pulmonary artery/aorta

Question 24

When does the tricuspid valve open?

Answer 24

When the pressure in the right atrium is higher than the pressure in the right ventricle.

Question 25

When does the biscupid valve close?

Answer 25

When the pressure in the left ventricle is higher than the left atrium