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Questions and Answers
During a sustained submaximal isometric contraction, what is the primary aim of increasing effort?
During a sustained submaximal isometric contraction, what is the primary aim of increasing effort?
- To increase body temperature
- To reduce plasma volume
- To overcome muscular fatigue (correct)
- To decrease energy production
Where in the brain do sustained increases in signal intensity occur during static handgrip exercise?
Where in the brain do sustained increases in signal intensity occur during static handgrip exercise?
- Mid-Cingulate Cortex
- Nucleus Tractus Solitarius (correct)
- Primary Somatosensory Cortex
- Anterior Cingulate Cortex
What is the main purpose of the increase in energy production during exercise in skeletal muscle?
What is the main purpose of the increase in energy production during exercise in skeletal muscle?
- To store excess energy
- To promote muscular fatigue
- To compensate for the increased demand (correct)
- To decrease body temperature
What was observed in the brainstem during post-exercise ischemia?
What was observed in the brainstem during post-exercise ischemia?
In what region of the brain do changes in neural activity occur during static handgrip exercise and post-exercise ischemia?
In what region of the brain do changes in neural activity occur during static handgrip exercise and post-exercise ischemia?
What physiological mechanism contributes to heat loss during exercise?
What physiological mechanism contributes to heat loss during exercise?
What is the main purpose of the increase in muscle sympathetic nerve activity discussed in the text?
What is the main purpose of the increase in muscle sympathetic nerve activity discussed in the text?
How is the increase in heart rate during exercise primarily regulated according to the text?
How is the increase in heart rate during exercise primarily regulated according to the text?
What effect does increased metabolic load have on blood flow to non-exercising muscles and the gut?
What effect does increased metabolic load have on blood flow to non-exercising muscles and the gut?
What contributes to the production of large amounts of metabolic heat during exercise?
What contributes to the production of large amounts of metabolic heat during exercise?
Which factors result in a decrease in blood pressure and perfusion pressure to the blood vessels of contracting muscles?
Which factors result in a decrease in blood pressure and perfusion pressure to the blood vessels of contracting muscles?
What accounts for the increase in blood pressure in the absence of central command during exercise?
What accounts for the increase in blood pressure in the absence of central command during exercise?
What happens to the blood vessels in exercising muscle?
What happens to the blood vessels in exercising muscle?
What is the primary output nucleus for muscle vasoconstrictor neurons?
What is the primary output nucleus for muscle vasoconstrictor neurons?
What happens to heart rate and blood pressure during effort?
What happens to heart rate and blood pressure during effort?
What is the name of the reflex response that occurs when metabolites accumulate in exercising muscle?
What is the name of the reflex response that occurs when metabolites accumulate in exercising muscle?
What happens to MSNA to non-contracting muscle during contraction and post-exercise ischaemia?
What happens to MSNA to non-contracting muscle during contraction and post-exercise ischaemia?
What is the name of the signal measured during static hand-grip exercise that indicates changes in neural activity?
What is the name of the signal measured during static hand-grip exercise that indicates changes in neural activity?
What is the primary purpose of increased blood flow to skeletal muscles during exercise?
What is the primary purpose of increased blood flow to skeletal muscles during exercise?
What is the primary source of heat production during moderate exercise?
What is the primary source of heat production during moderate exercise?
What is the effect of adrenaline on energy production during exercise?
What is the effect of adrenaline on energy production during exercise?
What is the primary mechanism of heat loss during exercise?
What is the primary mechanism of heat loss during exercise?
What is the approximate increase in metabolism during exercise compared to rest?
What is the approximate increase in metabolism during exercise compared to rest?
What is the primary regulator of heart rate during exercise?
What is the primary regulator of heart rate during exercise?
During exercise, what is the primary means of liberating heat?
During exercise, what is the primary means of liberating heat?
What happens to plasma volume when water and solutes are not replaced during exercise?
What happens to plasma volume when water and solutes are not replaced during exercise?
During exercise, what happens to blood flow to non-exercising muscles?
During exercise, what happens to blood flow to non-exercising muscles?
What effect do metabolites have on blood flow to exercising muscle?
What effect do metabolites have on blood flow to exercising muscle?
What happens to skin blood flow during heat stress?
What happens to skin blood flow during heat stress?
What happens to muscle sympathetic nerve activity (MSNA) during exercise?
What happens to muscle sympathetic nerve activity (MSNA) during exercise?
