Topic 8

Question 1

give one safety precaution you need to take when handling animal tissue such as blood vessels

Answer 1

wash hands

Question 2

which part of the blood causes the blood to start clotting?

A) erythrocytes
B) lymphocytes
C) platelets
D) antibodies

Answer 2

C) platelets

Question 3

give one advantage of a blood clot forming

Answer 3

to stop blood loss

Question 4

explain how one structure of a vein helps the blood return to the heart

Answer 4

veins contain valves which prevent backflow of blood

Question 5

explain why there is a change in the rate of blood flow through the digestive system during exercise

Answer 5

increased blood flow to the muscles to allow respiration in the muscles

Question 6

figure 2 showing components in blood

explain why there are some difference in the concentrations of some components in the blood and some components in this part of the nephron

Answer 6

glucose is found in the filtrate because it is small enough to pass through the membrane

Question 7

from which chamber does this volume of oxygenated blood flow?

A) left atrium
B) left ventricle
C) right atrium
D) right ventricle

Answer 7

B) left ventricle

Question 8

person has cardiac output of 4.9 litres per minute. the stroke volume of each heart beat is 70ml

calculate the heart rate

Answer 8

4.9 / 0.07

= 70

Question 9

the starch grains in the potatoes became smaller as the starch was converted into glucose
state why the potatoes need glucose

Answer 9

for respiration

Question 10

give two safety precautions that should be used when handling blood samples

Answer 10

1. wear gloves

2. wash hands after handling

Question 11

which parts of the heart carry oxygenated blood?

Answer 11

enters through pulmonary vein into left atrium into left ventricle and travels out of heart through aorta

Question 12

which parts of the heart carry deoxygenated blood?

Answer 12

enters through vena cava, enters right atrium into right ventricle and through pulmonary artery out the heart