mass transport exam questions

Question 1

Describe two precautions the student should take when clearing away after the dissection.

Answer 1

1.Carry/wash sharp instruments by holding handle
2.Disinfect instruments/surfaces;
3.Disinfect hands
OR
4.Wash hands with soap (and water);
Put organ/gloves/paper towels in a (separate) bag/bin/tray to dispose;

Question 2

Explain how an arteriole can reduce the blood flow into capillaries.

Answer 2

1.Muscle contracts;
2.Constricts/narrows arteriole/lumen;

Question 3

Describe the advantage of the Bohr effect during intense exercise.

Answer 3

1.Increases dissociation of oxygen;
Accept unloading/ release/reduced affinity for
dissociation
2.For aerobic respiration at the tissues/muscles/cells

Question 4

EPO is another performance-enhancing drug. It can increase the haematocrit
(the percentage of red blood cells in blood).
A heart attack is caused by a lack of glucose and oxygen being delivered to
cardiac muscle via the coronary arteries. The overuse of EPO can increase
the risk of a heart attack.
Suggest how.

Answer 4

EPO) causes blood to thicken;
Accept descriptions of thickening, eg more viscous
(The thickened blood) could block the coronary arteries
OR
(The thickened blood) slows blood flow