WorksheetsCH 9 Responses to acute exercise
Total questions: 17
Worksheet time: 9mins
During a workout, Noah notices changes in his heart rate as he increases the intensity of his exercise. What happens to his resting heart rate as exercise intensity increases?
It decreases due to increased parasympathetic activity
It remains constant regardless of exercise intensity.
It increases due to epinephrine acting on the SA Node
Arjun is training for a marathon and gradually increases his running intensity. What happens to his max heart rate as exercise intensity increases?
It decreases as stroke volume increases
It remains constant and is determined by age.
It increases due to epinephrine acting on the SA Node
During a fitness test, Harper is running on a treadmill and gradually increases the speed. What happens to Lactate Threshold as exercise intensity increases?
It increases, allowing the body to use more oxygen at higher intensities.
It increases due to the bicarbonate buffer
It remains constant regardless of exercise intensity.
It increases due to increased mitochondrial density
After a tough workout, Kai chooses to do some light jogging instead of resting completely. Why is active recovery important in this situation?
To increase lactate clearance
To increase venous return
To increase oxygen consumption
To increase stroke volume
During a soccer match, Kai notices that his breathing rate increases as he runs faster. What causes these increases in pulmonary ventilation during exercise?
Epinephrine and carbon dioxide acting on the brain
Epinephrine and carbon dioxide acting on the SA Node
Lactate Threshold
Increased hematocrit due to plasma loss
Ava is training for a marathon. Her doctor explains that left-ventricular distensibility is important for her heart's performance during exercise. What is left-ventricular distensibility, and what does it contribute to?
The ability of the left ventricle to contract forcefully, increasing stroke volume
The ability of the left ventricle to stretch and fill with blood, increasing stroke volume.
The ability of the left ventricle to pump blood efficiently, increasing blood pressure.
The ability of the left ventricle to resist stretching, increasing resistance
Rohan is training for a marathon and wants to maximize his heart's stroke volume during exercise. Which factor should be high and which should be low to help him achieve this?
Preload should be high, and afterload should be low.
Preload should be low, and afterload should be high.
Both preload and afterload should be high.
Both preload and afterload should be low.
James is studying how the heart works during exercise. He wants to know what factor affects preload in the heart.
Blood pressure.
Venous return.
Heart rate.
Lactate Threshold
Grace decides to start jogging. On her first day, she notices her heart rate increases and she starts sweating. After several weeks of regular jogging, she finds that her endurance improves and her heart rate doesn't rise as quickly. What is the difference between acute exercise and chronic training in terms of physiological responses?
Acute exercise leads to long-term adaptations, while chronic training leads to immediate responses.
Acute exercise involves immediate responses, while chronic training leads to long-term adaptations.
Acute exercise and chronic training both lead to immediate responses.
Acute exercise and chronic training both lead to long-term adaptations.
Scarlett is learning about how the heart works. She wonders what term refers to the resistance the heart must overcome to eject blood during systole?
Preload.
Afterload.
Stroke volume.
Cardiac output.
Nora is training for a marathon. During her workout, she decides to increase her running speed from 6mph to 7mph. What will happen to her heartrate?
increase due to epinephrine acting on the SA node
decrease due to increased vagal tone
not be affected
Lower due to higher blood volume
During a marathon, Maya notices that as her exercise intensity increases, her total blood volume:
increases due to increased plasma and RBC
decreases due to epinephrine causing vasodilation at the exercising muscle
decreases due to epinephrine causing vasoconstriction near the skin
decreases due to epinephrine causing vasodilation near the skin
During a treadmill workout, Jackson notices that as he increases his running speed, his respiratory exchange ratio (RER) changes. What happens to RER as exercise intensity increases?
increases due to increased lactate threshold
increases due to increased reliance on carbohydrates
decreases due to increased lactate threshold
decreases due to increased reliance on fat
Abigail, a trained runner, is increasing her speed from 5mph to 7mph during her workout. What is causing increases in stroke volume?
Increased plasma
increased internal diameter of the ventricle
epinephrine acting on the myocardium
hypertrophy of the left ventricular myocardium
During a sprint, Henry notices his heart working harder. Which physiological change occurs in his cardiovascular system during this acute exercise?
Decrease in cardiac output
Increase in stroke volume
Decrease in venous return
Decrease in heart rate
During a gym workout, Arjun notices his heart beating faster and stronger. What is the primary effect of increased sympathetic activity during exercise?
Increase heart rate and contractility
Reduce venous return
Lower blood pressure
Decrease pulmonary ventilation
Zoe is participating in a marathon and notices her muscles need more oxygen as she runs faster. During intense exercise, which factor contributes most to increased oxygen delivery to Zoe's muscles?
Lower heart rate
Increased stroke volume
Higher afterload
Decreased preload
