Exercise Physiology — Flashcards

Flashcard 21: The mean systemic filling pressure _____ tremendously at the onset of heavy exercise.

Answer: rises

Flashcard 22: Blood flow _____ to the kidneys, liver, and GIT during exercise.

Answer: decreases

Extra: During exercise, blood flow to the kidneys, liver, and gastrointestinal tract (GIT) decreases due to sympathetic-mediated vasoconstriction. In contrast, blood flow to active skeletal muscles increases significantly due to local metabolic factors (autoregulation).

Flashcard 23: In an athlete, during exercise, the arterial PCO2 and pH will _____

Answer: remain the same

Flashcard 24: Signals from _____ play a role in stimulating the respiratory drive during exercise.

Answer: joint proprioceptors

Flashcard 25: Time taken by a red cell is about _____ seconds to traverse the pulmonary capillaries during exercise

Answer: 0.3

Flashcard 26: During exercise, O2 consumption and CO2 formation _____

Answer: increase (remain same/increase)

Flashcard 27: The increase in heart rate and ventilation at the onset of exercise is an example of a _____ control mechanism.

Answer: Feedforward

Extra: Feedforward (anticipatory) control allows the body to prepare for exercise before feedback from chemoreceptors or mechanoreceptors is even received. This is mediated by 'central command' from the motor cortex.

Flashcard 28: _____ is defined as the amount of oxygen consumed while sitting at rest.

Answer: One metabolic equivalent (MET)

Flashcard 29: Skinfold thickness is considered an _____ (age-dependent / age-independent) parameter.

Answer: Age-independent

Extra: Skinfold thickness and Mid-Upper Arm Circumference (MUAC) are considered age-independent parameters in children between 1 and 5 years of age, as these values remain relatively constant during this period. In contrast, parameters like weight-for-age or height-for-age are age-dependent.