EXSS1036: Fundamentals of Exercise Physiology - Health Assignment Help

Assignment Task:

Task:

Instructions:
The Final Exam has 2 parts. Section A is a CANVAS Quiz (45 marks), Section B is a Take Home
Test, short answer questions (50 marks).
This is the Take Home Test.
You have 24 hours to complete this test. There are 11 questions and 50 marks available. Content will cover the entire unit.
You should insert you answer in the space provided. The space provided indicates the amount of text suggested, use this as aguide.. You MUST use 12 point font, Times New Roman, Arial, or Calibri. Line spacing may be single.
 

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Question 1 (6 Marks)
Complete the following table of cardiovascular responses at rets, cycling for 5 min at a steady-state intensity of 75% VO 2 max and during maximal cycling for a 39 year old male weighing 85 kgs.
Note: You will need to make some assumptions to complete the table.
You can use the space provided below to complete any calculations. Marks will only be awarded if accurate calculations are shown and/or appropriate assumptions are justified. All answers should be given to the nearest 1decimal place.
Identify any assumptions made and include calculations here:

Question 2 (4 Marks)
If during exercise:
Arterial PO 2 = 100mmHg (100% saturation) and venous PO 2 = 20mmHg

a) If [Hb] was 155 g/L, and during exercise Q = 18.5 L/min calculate (a-v)O 2 difference and V?O 2 (2 marks)

b) If [Hb] was increased by blood doping to 165g/L, calculate (a-v)O 2 difference and the Q required to provide the same V?O 2 as calculated in a. (using the same partial pressures of oxygen) (2 marks)

Question 3 (2 Marks)
a) What is V?O 2 max?

b) V?O 2 max is known to be generally higher in men than women, what is the primary physiological cause?

Question 4 (3 Marks)
Dominic completes two exercise tasks at the same power output (50 Watts), one leg based (cycling) one arm based (arm cranking). His RPP is much higher in the arm-based exercise. Briefly explain why.

Question 5. (3 marks)
In the table below are the force values (N) during a maximal voluntary contraction (MVC) which lasted for 60 seconds. Electrical stimulation was applied at 20, 40 and 60 seconds:

20 s 40 s 60 s
MVC (N) 150 100 75
Force with electrical stimulus
(N)

150 125 100

The magnitude of peripheral fatigue at 60 s was __________ N
Explain why Force increased at 40 s and 60 s when the electrical stimulus was applied (compared to MVC)

Question 6 (8 Marks)
Below is the blood lactate response for an individual completing an incremental exercise test. From your understanding of lactate metabolism, answer the following questions:

a) What is meant by the term OBLA? (2 marks)

b) What is the OBLA for this individual? (1 mark)

c) What are the mechanisms proposed to explain why the relationship between blood lactate and power output change between Box A and B? (5 marks)

Question 7 (4 Marks)
Describe the immediate energy systems (name and brief description of reactions, when they are likely to operate)

Question 8 (5 Marks)
Two different muscle fibres are illustrated below:
Muscle Fibre A is two sarcomeres long and six sarcomeres wide.
Muscle Fibre A is four sarcomeres long and four sarcomeres wide.

If each sarcomere can produce a maximal force of 10 nN (nano Newtons) and has a range of motion of 3 µm (micro metres).

What is the maximal force for muscle fibers A and B? (2 marks)
A =
B =

What is the range of motion for muscle fibers A and B? (2marks)
A =
B =

Which muscle fiber (A versus B) would better represent the sarcomere arrangements for the following muscles? (1 mark)

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