Muscle Metabolism
Presentation
•
Specialty
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University
•
Hard
Cerebrum Zeitung
FREE Resource
28 Slides • 24 Questions
1
2
3
4
Multiple Choice
Contractile unit of a muscle.
sarcomere
motor unit
fascicle
myofibril
5
Multiple Choice
What is a crossbridge?
Where myosin binds to actin
Where the calcium crosses into the cytoplasm
Where calcium binds with troponin
None of the answers are correct.
6
Multiple Choice
Calcium:
causes ATP binding to actin
increases the action potential along the sarcolemma
binds to proteins on myosin
triggers the binding of myosin to actin
7
8
9
Multiple Choice
10
Multiple Choice
11
Multiple Choice
12
13
Multiple Choice
14
15
16
Multiple Choice
Which muscle tissue has intercalated discs?
Cardiac
Smooth
Skeletal
Visceral
17
18
19
Multiple Choice
Oxygen starved tissues can release chemical signals into the blood that can change the diameter of nearby blood vessels delivering oxygen and nutrients to the tissues. In doing so, the blood vessels will respond through vasodilation (widening of the vessel). Which muscle type is responsible for this vasodilation?
smooth muscle
cardiac muscle
skeletal muscle
striated muscle
20
21
Multiple Choice
Which thin filament protein bind to Ca during muscle contraction?
Actin
Myosin
Troponin
Tropomyosin
22
23
24
25
Multiple Choice
Gluconeogensis in __________ provides a source of ___________ for transport in the bloodstream and use by ___________.
Muscle; glucose-6-phosphate; liver
Liver; ATP; brain
Liver; glucose-6-phosphate; brain
Liver; glucose; brain and muscle
26
27
Multiple Choice
Hexokinase is an isoenzyme of glucokinase that adds a Phosphate to Glucose upon entry to the cell. Which of the following organ expresses hexokinase?
Kidney
Liver
Muscle
Brain
28
29
30
Multiple Choice
Glycogenolysis is inactive when _______.
Muscles are active
Heart rate is normal
Heart rate is elevated
Muscles are at rest
31
32
33
Multiple Choice
Creatine phosphate functions in the muscle cell by ________.
forming a temporary chemical compound with myosin
forming a chemical compound with actin
inducing a conformational change in the myofilaments
storing energy that will be transferred to ADP to resynthesize ATP
34
35
Multiple Choice
How long does it take phosphocreatine to replenish stores in muscles?
0-1min
1-2min
2-3min
3-4min
36
37
Fill in the Blanks
Type answer...
38
39
Multiple Choice
Which of the following is a factor that affects the velocity and duration of muscle contraction?
number of muscle fibers stimulated
size of the muscle fibers stimulated
load on the fiber
muscle length
40
41
Multiple Choice
What does excess postexercise oxygen consumption represent?
amount of oxygen needed for aerobic activity to accomplish the same amount of work
the difference between the amount of oxygen needed for totally aerobic muscle activity and the amount actually used
the amount of oxygen equal to the oxygen already used
the amount of oxygen taken into the body immediately after the exertion
42
Multiple Choice
Which of the following is the correct sequence of events for muscle contractions?
motor neuron action potential, neurotransmitter release, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke, sliding of myofilaments
neurotransmitter release, muscle cell action potential, motor neuron action potential, release of calcium ions from SR, sliding of myofilaments, ATP-driven power stroke
muscle cell action potential, neurotransmitter release, ATP-driven power stroke, calcium ion release from SR, sliding of myofilaments
neurotransmitter release, motor neuron action potential, muscle cell action potential, release of calcium ions from SR, ATP-driven power stroke
43
44
Multiple Choice
45
46
Multiple Choice
Power stroke will occur when
ATP binds to myosin head
Myosin head releases ADP and Pi
Myosin head hydrolyse ATP
Myosin binds to actin
47
Multiple Choice
48
49
50
Multiple Choice
The ability for a muscle to work against a resistance for an extended period of time is
Muscular strength
Flexibility
Cardiovascular endurance
Muscular endurance
51
Multiple Choice
If exercise lasts for 12 seconds, what is the main energy system used?
Lactic Acid
Creatine Phosphate
Aerobic
52
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