2000 - Question 3. Sarah, a 26 year old book shop manager, is at the beach, half asleep on the sand. When a
rain and hail storm hits the beach, Sarah sprints 200m over the sand to her car to escape the storm.

(c) Discuss the mechanisms which cause an increase in Sarah’s heart rate during the sprint.
(10 minutes)

2004 - Question 4.
a) During exercise, blood flow in the body is redirected so that contracting muscles receive an increased proportion of the available blood supply. Explain the main mechanisms contributing to this.
(7 marks)
b) How do the conditions in the capillary blood of exercising muscle contribute to provision of oxygen (per unit of blood in the capillary) for use by contracting muscles?
(4 marks)

2006 - Question 1.
(a) In a healthy person, would you expect the balance between oxygen demand in the heart and oxygen
supply to heart muscle to change during exertion? Explain. Outline ways in which atherosclerosis
in coronary arteries might influence this balance?
(7 marks)

2008 - Question 2.
A 56 year old accountant goes walking with his 19 year old son in Tasmania. On steep sections of the trail, both father and son can feel that their heart rates have increased markedly and they are breathing heavily. The father, but not the son, begins to have some central chest pain and a general feeling of tightness across his chest on some particularly steep sections. They agree to rest then proceed at a slower pace at which the father feels more comfortable.
Discuss the mechanisms which normally allow the heart to meet its energy needs during periods of exertion and suggest (briefly) what might be different in the father to account for his chest pains during heavy exertion.
(10 marks)