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Exercise Physiology Test 2
practice exam 1 (summer 2018)
Terms in this set (43)
Where does air become adjusted to body temperature?
in the trachea
What happens to maximum HR as a person ages?
Which of the following best describes residual lung volume?
The air volume remaining in the lungs even after exhaling as deeply as possible
Oxygen unloading of hemoglobin during exercise:
Increases with increase partial pressure of CO2
What term refers to an increase in pulmonary ventilation that exceeds the immediate oxygen needs of metabolism?
Following exhausting exercise, what action can athletes use to facilitate blood flowing back to the heart?
continue to exercise at a slower intensity
___________refers to painful breathing or subjective distress in breathing
Which of the following techniques provides the most efficient way to achieve better alveolar ventilation for an athlete during exercise?
Adequate gas exchange between alveoli and blood requires effective matching of alveolar ventilation to ____________.
Blood flowing through the pulmonary capillaries
The term __________________describes the portion of the alveolar volume with a ventilation-perfusion ratio that approaches zero
Physiological dead space
What does the term venous mixed blood refer to?
Blood that contains CO2 from muscle and O2 from the lungs
Pound for pound, women tend to have a lower VO2 max than men. Which of the following reasons does not explain this difference?
Men tend to have lower hemoglobin levels
What does the arterio - venous (a - v O2) oxygen difference describe?
The difference in oxygen content of arterial blood and mixed-venous blood
What term is given to an iron-containing globular protein in skeletal and cardiac muscle fibers?
Which of the following is least likely to affect hemoglobin's oxygen-binding affinity?
What percentage of the total carbon dioxide is carried through the system as plasma bicarbonate?
Which of the following does not determine the rate of gas diffusion into a fluid.
the fitness level of the individual
Why is the amount of oxygen released to the muscles during exercise almost three times more than the amount normally supplied at rest?
There is more-complete unloading of hemoglobin, particularly as it flows through endurance-trained muscles
What exerts the greatest control over pulmonary ventilation in a healthy person?
the chemical state of the blood
What does a prolonged Valsalva maneuver produce?
A reduction in blood flow to the brain
During light to moderate exercise, ventilation increases mainly through what means?
increased tidal volume
What term describes the ratio of minute ventilation to oxygen consumption?
Which of the following is not a probable explanation for the increase in lactate appearance in the blood?
Imbalance between the rate of anaerobic glycolysis and mitochondrial respiration
Insufficient blood flow to skeletal muscle
Insufficient blood oxygen content
Relative tissue hypoxia
All the above can lead to increases in blood lactate levels
The ventilatory response to exercise occurs in several phases. Which of the following is not involved in the ventilatory response?
Peripheral sensory feedback mechanisms
Ventilation rises in relation to exercise demands.
Cortical stimulus feedback leading to increases in ventilation.
Hyperventilation significantly lowers arterial PCO2 and H+ concentration.
All the above are involved in ventilation
To eliminate carbon dioxide and thus reduce arterial levels of carbonic acid, what must occur?
Inspiratory activity must increase.
The metabolic demands of respiratory muscles during maximal exercise require an increase in localized ________________.
What does the ventilation-perfusion ratio do during intense exercise?
Chambers on the right side of the heart perform which of the following functions?
Pump blood into the pulmonary system
The left side of the heart receives oxygenated blood from the lungs and pumps blood
With the initiation of diastole, the right side of the heart _________.
Blood ejects from the heart when _________.
Ventricular pressure exceeds aortic pressure
Blood pressure is a product of _________.
cardiac output and total peripheral resistance
Hypertension is defined as _________.
Systolic blood pressure above 140 mm Hg and a diastolic pressure exceeding 90 mm Hg
The inferior vena cava returns blood to the right atrium from the _________.
Capillaries feed deoxygenated blood into ___________.
What is the term for moderate exercise in recovery that facilitates blood flow through the vascular circuit, including myocardial vessels?
active cool down
What does the electrocardiogram, or ECG, represent?
Heart's electrical events during a cardiac cycle
Cardiac output refers to the amount of blood pumped per minute. It is a product of which of the following variables?
stroke volume and heart rate
How does the approximate average cardiac output at rest compare for trained and untrained individuals?
about the same
During exercise, epinephrine:
increases heart rate
Which of the following statements regarding blood flow during exercise is true?
Increases as cardiac output contribute greatly to increased muscle blood flow during exercise.
Which of the following statements about training adaptations is not true?
oxygen extraction increases
If stroke volume could not be increased, cardiac output would only increase by increasing the ______.
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