chapter 6 physiology Flashcards
the i band includes…
a. the h zone
b. the z lines
c. the zone of overlap
d. the m line
z lines
What is directly triggered by calcium binding to troponin C?
a. exposure of actin binding sites
b. power stroke
c. cross bridge detachment
d. cross bridge. formation
exposure of actin binding sites
phosphocreatine-creatine system description
Used for power surges for less than 10 seconds of muscle activity
glycogen-lactic acid system description
Provides extra power during intermediate races, up to about 90 seconds of muscle activity
Aerobic Metabolism description
Used for sustained long term muscle activity. Requires oxygen and mitochondria.
All of the following are functions of muscle tissue EXCEPT
a. movement of limbs
b. propulsion of body fluids
c. generation of body heat
d. absorption of nutrients
e. maintenance of body posture
absorption of nutrients
Which are extensions of sarcolemma through the muscle cell, and function to carrying electrical current into the cell?
a. t-tubules
b. sarcoplasmic reticulum
c. epimysium
d. myofibrils
e. myoblasts
f. perimysium
g. sarcoplasm
h. endomysium
t-tubules
What is directly triggered by myosin hydrolyzing ATP into ADP and Pi?
a. power stroke
b. cross bridge formation
c. cross bridge detachment
d. exposure of actin binding sites
cross bridge formation
All of the following are functions of muscle tissue EXCEPT
a. Exchange of blood gasses
b. movement of limbs
c. propulsion of body fluids
d. maintenance of body posture
e. generation of body heat
exchange of blood gasses
Which regulates calcium storage, release and re-uptake in skeletal muscle cells?
a. t-tubules
b. sarcoplasmic reticulum
c. epimysium
d. myofibrils
e. myoblasts
f. perimysium
g. sarcolemma
h. endomysium
sarcoplasmic reticulum
isometric muscle contraction description
Muscle develops tension, but does not shorten
isotonic concentric muscle contraction description
Muscle shortens as tension remains constant
isotonic eccentric muscle contraction description
Muscle lengthens while tension is maintained
The A band includes…
a. the z line
b. zone of overlap
c. m line
d. h zone
h zone, m line, the zone of overlap
The cell membrane of a muscle cell is called the
a. myoblasts
b. t-tubules
c. sarcoplasmic reticulum
d. myofibrils
e. epimysium
f. sarcolemma
g. perimysium
h. endomysium
sarcolemma
isometric muscle contraction example
As you carry the box across the room
isotonic concentric muscle contraction example
As you elevate/lift the box off of a table
isotonic eccentric muscle contraction example
As you set the box down on a table
cross bridge detachment occurs when…
a. myosin releases Pi and ADP
b. myosin hydrolyzes ATP to ADP and Pi
c. myosin binds to ATP
d. calcium binds to troponin C
calcium binds to troponin C
thin filaments are compromised of…choose all that apply
a. troponin
b. tropomyosin
c. myosin
d. actin
actin, tropomyosin, troponin
All of the following are functions of muscle tissue EXCEPT
a. production of white blood cells
b. movement of limbs
c. propulsion of body fluids
d. maintenance of body posture
e. generation of body heat
production of white blood cells
What is directly triggered by ATP binding to myosin?
a. cross bridge detachment
b. power stroke
c. cross bridge formation
d. exposure of actin binding sites
cross bridge detatchment
thick filaments are compromised of…
a. tropomyosin
b. troponin
c. myosin
d. actin
myosin
specialized contractile cells are called?
a. myoblasts
b. t-tubules
c. sarcoplasmic reticulum
d. myofibrils
e. epimysium
f. sarcolemma
g. perimysium
h. endomysium
myofibrils
