Jigsaw learning assignment
Chapter 8
Cardiorespiratory Responses to Acute Exercise
PART 1: You will be assigned to 1 of 5 HOME groups. Each group will be responsible for
learning the material directed by the questions provided. Utilize your textbook, web study guide
and any other outside sources to answer questions. As a group, develop how best to relay
(teach) these concepts to other students.
PART 2: Then we will re-organize groups into 1 of 5 EXPERT groups (1 member from each
HOME group). Each member of group will answer (teach) the rest of the members the concepts
and questions assigned in the HOME group.
PART 3: Return to home groups and review questions together to ensure understanding.
Group 1:
1. Describe how heart rate, stroke volume and cardiac output respond to increasing rates
of work. Illustrate how these three variables are interrelated.
2. How do we determine HRmax? What are alternative methods using indirect estimates?
What are the major limitations of these indirect methods?
3. Describe two important mechanisms for returning blood back to the heart during
exercise in an upright position.
Group 2
1. How does blood pressure response to exercise?
2. What are the major cardiovascular adjustments that the body makes when someone is
overheated during exercise?
3. What is cardiovascular drift? What two theories have been proposed to explain this
phenomenon?
Group 3
1. Describe the primary functions of blood.
2. What changes occur in the plasma volume and red blood cells with increasing levels of
exercise?
3. What changes occur in the plasma volume and red blood cells with prolonged exercise
in the heat?
Group 4
1. Describe how pulmonary ventilation is regulated. What are the chemical stimuli that
control the depth and rate of breathing?
2. How does pulmonary ventilation respond to increasing intensities of exercise?
3. What is meant by the terms dyspnea, hyperventilation, valsalva maneuver, an ventilatory
threshold.
Group 5
1. What role does the respiratory system play in acid base balance.
2. What is normal resting pH for arterial blood? For muscle? How are these values
changed as a result of exhaustive sprint exercise?
3. What are the primary buffers in the blood? In the muscle?