Exam 2 Exercise Physiology
Starling law of the heart
. The fact that an increase in end-diastolic volume increases stroke volume is an illustration of the blank ?
True
At rest the majority of cardiac output is directed to the liver and kidneys (True or False)?
False
Carbon dioxide and oxygen directly compete with each other for hemoglobin binding (True or False)?
False
Delayed onset muscle soreness (DOMS) is associated with inflammation but not actual structural damage to the muscle (True or False)?
True
During an incremental exercise protocol, the region where oxygen consumption plateaus despite an increase in workload is called the maximal aerobic capacity or maximal oxygen consumption (True or False)?
False
During endurance exercise, diastolic blood pressure increases proportionally with exercise intensity while systolic blood pressure may actually decrease a little (True or False)?
steady state
During submaximal exercise, the flat portion of the oxygen consumption curve is usually called the?
False
If James and his brother (who is 3 years older and 50 Lb heavier) both have a of 4.5 L/min, they are equally aerobically fit. (True or False)?
decrease hemoglobin's effectiveness to bind oxygen
Increases in acidity and temperature:
False
Muscle cramping is usually caused by a potassium deficiency (True or False)?
False
Resting RER is 1.0 (True or False)?
40-60% VO2 max
Stroke volume continues to increase during exercise up to approximately:
True
The Frank-Starling mechanism explains that the heart generates a stronger contraction when there is a greater stretch on the ventricle (True or False)?
increases with an increase in exercise intensity
The arteriovenous oxygen difference ((a-v) o2 diff):
T Wave
The blank represent ventricular repolarization on an ekg is?
False
The immediate increase in ventilation that occurs before the onset of exercise is stimulated by changes in blood CO2 and H+ (True or False)?
False
The majority of carbon dioxide in the blood is transported combined to the hemoglobin (True or False)?
True
The point at which ventilation increases disproportionately compared to oxygen consumption is called the ventilatory threshold (True or False)?
True
The process of gases moving across the respiratory membrane and being exchanged between the alveoli and the pulmonary capillary blood is called pulmonary diffusion (True or False)?
False
The sinoatrial node is responsible for delaying the action potential before it gets relayed down to the lower half of the heart (True or False)?
lag in oxygen consumption at the beginning of exercise
The term oxygen deficit refers to the : ?
False
Veins always carry deoxygenated blood (True or False)?
All of the above
Which of the following occurs at the lactate threshold?
13.3 L/min
Ziggy has an exercise blood pressure of 150/60, a heart rate of 140 bpm, a max Vo2 of 33 ml/kg/min, and a stroke volume of 95 mL. What is her cardiac output?
90 mm Hg
Ziggy has an exercise blood pressure of 150/60, a heart rate of 140 bpm, a max Vo2 of 33 ml/kg/min, and a stroke volume of 95 mL. What is her mean arterial pressure?
True
A 30 min job will generally result in a greater oxygen debt than a 30 min walk (True or False)?
False
Active recovery leads to additional lactic acid production and should be avoided after exercise (True or False)?
False
After prolonged aerobic exercise in a hot environment, cardiovascular drift occurs, where stroke volume gradually increases, and heart rate gradually decreases (True or False)?
True
lactate threshold will be attained at a higher relative intensity in a trained person when compared to an untrained person (True or False)?
True
the unloading portion of the oxyhemoglobin dissociation curve has a steeper slope than the loading portion (True or False)?