The Heart

Question 0

Deoxygenated blood moves to the right ventricle where it then pumps to the…… Via the …….

Answer 0

Pumps to the lungs

Via the pulmonary artery

Question 1

Right artium

Answer 1

Receives deoxygenated blood from the body (through the vena cava)

Question 2

Where does the left atrium recipes oxygenated blood from?

Answer 2

The lungs via the pulmonary vein

Question 3

Oxygenated blood then moves through to the left ventricle, which pumps it around the….

Answer 3

Whole body via the aorta

Question 4

Why does the left ventricle have a much thicker wall then the right ventricle?

Answer 4

Left ventricle needs more muscle because it has to pump blood around the whole body. The right ventricle only has to pump it to the lungs. The left is also under a greater presssure.

Question 5

What do valves do?

Answer 5

Prevents the backflow of blood

Question 6

Exercise increases heart rate. When you exercise your muscles need more energy so you..?

Answer 6

Respire more.

Question 7

Exercise increases the amount of what in the blood?

Answer 7

CO2

Question 8

High levels of CO2 are detected by receptors in the ….. And …..(an artery in the neck)

Answer 8

Aorta and carotid artery (sends signals to the brain which send signals to the heart causing it to contract more frequently with more force)

Question 9

Which system helps control heart rate?

Answer 9

The hormonal system

Question 10

When an organism is threatened the adrenal gland release…?

Answer 10

Adrenaline

Question 11

Adrenaline bonds to specific receptors in the heart. This causes cardiac muscle to ???

Answer 11

Contract more frequently and with more force, so the heart rate increases and the heart pumps more blood.