A sedentary person has a heart rate of 130 bpm when jogging at 5 mph on the trea
ID: 3516340 • Letter: A
Question
A sedentary person has a heart rate of 130 bpm when jogging at 5 mph on the treadmill. After the person completed a 4 month aerobic training program their heart rate was only 115 bpm at 5 mph. Why is their heart rate lower after an aerobic training program? (Select all that apply)
A.
Reduced hydrogen ion accumulation
B.
Less sympathetic nervous system activation
C.
Greater fatty acid oxidation capacity
D.
Reduced recruitment of fast-twitch muscle fibers
E.
Greater stroke volume
F.
Greater mitochondrial density
G.
Reduced oxygen demand by skeletal muscles involved in jogging
Question 60
The average VO2 max value for the young female sedentary population is
A.
38 ml/kg/min
B.
22 ml/kg/min
C.
83 ml/kg/min
D.
48 ml/kg/min
Question 58
The Bohr effect
A.
Improves oxy-hemoglobin dissociation
B.
None of the above
C.
Improves oxygen-hemoglobin binding
D. impairs O2 delivery in peripheral tissue
Question 49
Why is the oxygen deficit in the beginning of exercise less in trained endurance athletes compared to untrained persons? Select all that apply.
A.
Increased ratio of slow-twitch muscle fibers
B.
Greater phosphofructokinase activity
C.
Greater sympathetic nervous system activation
D.
Increased mitrochondrial density
Question 48
Respiratory acidosis is due to... (select all that apply)
A.
Increased presence of protein buffers
B.
A reduction in bicarbonate buffering capacity
C.
An increase in lactic acid production
D.
An increase in CO2 production which results in an increase in plasma H+ concentration
A.
Reduced hydrogen ion accumulation
B.
Less sympathetic nervous system activation
C.
Greater fatty acid oxidation capacity
D.
Reduced recruitment of fast-twitch muscle fibers
E.
Greater stroke volume
F.
Greater mitochondrial density
G.
Reduced oxygen demand by skeletal muscles involved in jogging
Explanation / Answer
A. Reduced hydrogen ion accumulation.
B. Less sympathetic nervous system activation.
C. Greater fatty acid oxidation capacity.
D. Reduced recritment of fast - twitch muscle fibres.
E. Greater stroke volume.
F. Greater mitochondrial density.
G. Reduced oxygen demand by skeletal muscles.
60. The average VO2 max value for the young female sedentary population is 38 ml/kg/min .
58. The Bohr effect improves oxy-hemoglobin dissociation. Option A
49. A. Increased ratio of slow twitch muscle fibres
B. Greater phospho fructokinase activity.
C. Greater sympathetic nervous system acvtivation.
D. Increased mitochhondrial density
48. Option A. Increased presence of protein buffers.
B. A reduction in bicarbonate buffering capacity.
C. An increase in lactic acid production.
D. An increase in CO2 production which results in an increase in plasma H+ concentration.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.