quiz questions Flashcards
What type of muscle is found surrounding the small intestine?
smooth
What structure stores Ca2+ in the muscle cell?
Sarcoplasmic reticulum
Ca2+ binds to which protein in order to start a muscle contraction?
Troponin
Which muscle fibers would you use during a short, high intensity endurance event (1,600 m run)?
Type IIa
What is the correct order of blood flow through the chambers of the heart?
Right atrium, right ventricle, left atrium, left ventricle
Which of the following slows down the conduction signal in the heart?
AV node
Which of the following is a measure of the total volume of blood pumped per minute?
Cardiac Output
Where does gas exchange take place in the lungs?
Alveoli
Which way does the diaphragm move when you inhale?
Inferiorly
Which of the following is a measure of the total volume of air you can voluntarily inhale and exhale?
Vital capacity
For a fixed intensity, what happens to heart rate after training?
Decrease
At a fixed intensity, what happens to cardiac output after training?
Remain the same
What happens to the number of capillaries in a muscle with training?
Increase
Generally speaking, what shift in muscle fiber type do you see with training?
Type II to type I
Which of the following best describes fat as a metabolic substrate?
High energy density, slow energy
What metabolic pathway are you most likely to use primarily when running the 400m?
Glycolysis
Which of the following systems produces the most ATP?
Oxidative
If I measure the number of times you can list a 15 lb weight (well below your 1 RM), what am I measuring?
Muscular endurance
The idea that you need to continue to train at some level in order to maintain the gains you have achieved with training is due to the principle of:
Reversability
The idea that you need to continue to increase the demand on the body in order to achieve gains is due to the principle of:
Progressive overload
Primary muscle used in respiration
diaphragm
the measure of the maximum amount of volume of air you can voluntarily move during regular breathing
tidal volume
stroke volume with training
increase
resting HR with training
decrease
myoglobin with training
increase
least used substrate
protein
substrate is the most energy dense
fat
metabolic pathway during a marathon
oxidative
where does oxidative system occur
mitochondria
if there is oxygen present, what happens to the pyruvate created during glycolysis
it converts to Acetyl CoA
structure carries AP deeper into muscle fiber
T-tubules
fiber type produces fastest contractions
IIx
measure of the volume of blood pumped out of the left ventricle
stroke volume
cardiac output measure of
amount of blood pumped per minute
