WorksheetsWeek 9 Muscle Practice Quiz BIOL2001C SI SS22
Total questions: 35
Worksheet time: 18mins
What other name(s) can be used interchangably for the term "muscle fiber"?
Muscle cell
Myocyte
Myofibril
Sacromere
In the figure depicted, #10 is pointing to...
The endomysium
The perimysium
The retromysium
The myocyte cover
In the figure depicted, #8 is pointing to...
A transverse (T) tubule
Terminal cisternae
The sacrolemma
The endomysium
During muscle contraction, the A band in the sacromere:
Remains unchanged
Becomes longer
Becomes shorter
None of these options are correct
The boundaries for when a sacromere begins and ends can be determined by which of the following?
Z disc to Z disc
M line to M line
I band to I band
H zone to H zone
In the figure depicted, #8 is pointing to...
Myosin
The M line
Actin
The H zone
In the figure depicted, #4 is pointing to...
Myosin
Actin
Titin
Acetylcholine (Ach)
During muscle contraction, the structure at #5 would...
Remain unchanged
Become longer
Become shorter
None of these options are correct
In this depiction of the neuromuscular junction (NMJ), #1 refers to the:
Axon terminal
Sacrolemma
Acetylcholine vesicle
Voltage-gated calcium channel
In this depiction of the neuromuscular junction (NMJ), #7 refers to the:
None of these options are correct
Sacrolemma fusion
Release of acetylcholine via exocytosis
Release of acetylcholine via endocytosis
In this depiction of the neuromuscular junction (NMJ), #6 refers to the:
Motor end plate
Axon terminal
Acetylcholine receptor
Endomysium
In this depiction of the neuromuscular junction (NMJ), #2 refers to the:
Acetylcholine molecule
Synaptic vesicle
Ligand-gated sodium channel
Voltage-gated sodium channel
A sodium-channel blocker medication would most likely affect what structure in this image?
#5
#7
#10
#1
The channel depicted at #3 in this image is of what classification?
Mechano-gated
Voltage-gated
Ligand-gated
None of these options are correct
When a muscle cell is resting, the unequal distribution of cellular ions causes what is known as...
A membrane potential
An action potential
A depolarization potential
A hyperpolarization potential
The inside of the cell is more _______ and has a higher concentration of _____.
Negative; sodium
Negative; potassium
Positive; potassium
Positive; sodium
Action potentials can only be generated by...
The opening and closing of leak channels
The opening and closing of gated channels
The opening of the potassium leak channel
None of these options are correct
_____ ions rushing into the ______ of the cell causes a phenomenon known as _______.
Sodium; inside; depolarization
Potassium; outside; depolarization
Sodium; inside; hyperpolarization
None of these options are correct
__________ refers to the efflux of potassium ions out of the cell.
Depolarization
Hyperpolarization
Negative depolarization
Positive depolarization
True/False: Action potentials, when generated, tend to stay in one place inside the cell.
True
False
In the graph depicted, #2 refers to:
The threshold
Depolarization phase
Hyperpolarization phase
The resting membrane potential
A toxin that interfered with the opening of voltage-gated potassium channels would have the greatest effect on what phases in this graph?
#1
#4
#5
#3
In the figure depicted, the phase at #1 refers to:
The hydrolysis of ATP
The release of ATP
The hydrolysis of ADP
The release of ADP
In the figure depicted, the structure at #6 is:
A calcium ion
Troponin
Tropomyosin
ATP
In the figure depicted, the structure at #7 is:
Troponin
ADP
Tropomyosin
ATP
In the figure depicted, the phase at #3 refers to:
The power stroke
Cross-bridge formation
Cross-bridge release
ATP hydrolysis
When a muscle is at rest, the structure at #5 would be covered by what other structure on this figure?
#7
#8
#6
None of these options are correct
Rigor mortis (the progressive stiffening of skeletal muscles after death) is caused by:
The lack of ATP to pump calcium back into the sarcoplasmic reticulum
The increased availability of ADP
The decreased availability of ADP
The lack of ATP to pump potassium back into the sarcoplasmic reticulum
A toxin that interfered with ___________ would most likely cause sustained muscle contraction.
Acetylcholinesterase
The release of sodium from voltage-gated channels
The release of calcium from ligand-gated channels
The release of potassium from voltage-gated channels
Stored _____ provides the most immediate use of energy for a muscle cell.
ATP
Calcium
Phosphate
Proteins
When oxygen is not readily available for muscle cells, _______ will be broken down into ______.
Glycogen; protein
Pyruvate; lactic acid
Proteins; carbohydrates
Lactic acid; glucose
The molecule ________ can release extra oxygen into muscle cells when needed during periods of activity.
Myoglobin
Hemoglobin
Oxyhemoglobin
Carbaminohemoblogin
________ catalyzes the transfer of a _______ group from creatine phosphate to ADP, making ATP.
Creatine ligase; carbohydrate
Creatine kinase; phosphate
Mitochondriase; phosphate
Glucagon; phosphate
True/False: Muscle cells first prefer to use fatty acids and proteins for their energy source.
True
False
Oxidative catabolism in muscle cells would take place in the _______.
Cytoplasm
Mitochondria
Lysosome
Peroxisome
