Exercise Physiology Flashcards
___mysium surrounds individiual cells.
Endomysium
___mysium surrounds muscle fasicles.
Perimysium
___mysium covers outer segments of muscle
Epimysium
MUSCLE CONTRACTION
Actin attaches to the what line?
Myosin attaches to what line?
Actin- Z ine
Myosin- M line
MUSCLE CONTRACTION
The __ Band contains actin and myosin
The __ Band contains only actin
A Band
I band
What is the H Zone?
What parts of the sacromere get smaller during contraction?
Middle of the A band that only contains myosin
H zone
I band
How many ATP to produce full muscle contraction?
2 ATP
Type IIa
Type IIx
fast twitch glycolytic
Exception to the Henneman Size Principle
Which energy system predominates in 1-3 min range?
How many ATP produced?
Anaerobic
2 ATP from glycolysis
3 ATP from glycogen
What is the rate limiting step in glycolysis?
the catalyst phospofructose kinase
Main energy source for last than 30 seconds
ATP-phosphcreatine
Main energy source greater than 3 minutes
Aerobic
In aerobic energy system the byproduct of Krebs
is ____. The byproduct of electron transport chain is _____.
CO2
WATER
Net ATP from glycolysis
Net ATP from glycogen
38
39
Which substrate (glucose or Fat) nets the highest ATP?
Fat=129 ATP
Increase Cardiac Output at low to moderate intensity exercise is a result of what?
SV and HR increasing
Increase Cardiac Output at high intensity exercise is a result of what?
Heart Rate only due to Stroke volume as a result of cardiac drift.
Cardiac Drift- during prolonged exercise their is a gradual incrase in HR and decrease in SV due to lesser diastolic filling.
How is oxygen consumption (VO2) trainable?
VO2 has direct linear releationship with ___?
With better conditioning (lower resting HR and Increase SV) athletes can increase lactate threshold thereby staying in aerobic respiration.
CO
How does GH and Testosterone respond to both anaerobic and aerobic exercise?
Testosterone increases with anereobic
GH increases with both aerobic and anaerobic.
