Discuss how multiple body systems normally work together for oxygen to enter
the body and reach cells. (discuss the pathway of oxygen moving from outside of
the body, to inside of body cells; include integration of multiple body systems).
Brodie is a 55 year old male, who is 185cm tall, weighs 95kg, and has a waist
circumference of 100cm. Two months ago, his mean arterial blood pressure was
150/95mmHg, and he had high blood cholesterol (he has high level of LDL and total
cholesterol, and low HDL). Although he has started making some lifestyle changes,
including starting to exercise, he has now been diagnosed with a mild upper
respiratory infection (he has “a cold”).
1. Interpret Brodie’s body shape and size. What would an ideal body shape and
size be for him (what would he need to achieve in order to decrease his health
risks?).
2. Provide an explanation of how the different types of cell respiration, aerobic and
anaerobic, can be used by skeletal muscles during exercise. (include an
explanation of the preferred type of respiration in skeletal muscle cells, and why it
is preferred).
4. Discuss how the electrolytes sodium, potassium and calcium, which are present
in body fluids are important for normal neuron function. (focus on the proportions
[high or low] of these electrolytes in the blood and in body cells, and how these
relate to neuron signalling).
5. Discuss how exercise is important in promoting venous return. Is his venous
return likely to be influenced by his mean arterial blood pressure of
150/95mmHg? (discuss how venous return is increased by exercise).
6. Discuss how Brodie’s respiratory infection would be likely to influence his
oxygenation, and what compensation would usually occur by the body when
someone has “a cold”. (compensation refers to changes that the body makes in
order to compensate for a change in homeostasis).
7. Brodie’s blood pressure and cholesterol are both significant risks for
development of coronary artery disease, in which a blockage in a coronary blood
vessel leads to insufficient blood flow reaching heart muscle cells. If Brodie were
to develop severe coronary artery disease, what could that mean in terms of
delivery of oxygen to his heart muscle cells? How would this effect his heart
muscle cell function? (ensure that you include aerobic and/or anaerobic
respiration).
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