ch 10 review
The period of force generation is called a(n):
Contractile period
Which type of wave summation is characterized as no observable relaxation between twitches?
Fused tetanus
using the biceps brachii to lower a glass to the table represents an example of a(n):
eccentric isotonic contraction
The M line contains overlapping thin and thick filaments.
f
The space between the synaptic end bulbs of axon terminal and sarcolemma is called the motor end plate.
f
Using the biceps brachii to hold a glass in the same position represents an example of a(n):
isometric contraction
Which muscle fiber type has the fastest contraction velocity? 1. Slow oxidative (SO) 2. Fast oxidative-glycolytic (FOG) 3. Fast glycolytic (FG)
3 only
Which of the following muscle fiber types is recruited last?
Fast glycolytic (FG)
Rod-like structures within skeletal muscle fiber that contain thin and thick filaments organized into sarcomeres are called:
Myofibrils
Select the lowest stimulus that results in force generation.
Threshold stimulus
The Z disc is a point of attachment for the thick filaments.
f
The endomysium is a connective tissue covering surrounding the muscle organ.
f
The epimysium is a connective tissue covering surrounding individual muscle fibers.
f
he synaptic vesicles are found in the synaptic end bulbs of axon terminal. They contain calcium ions.
f
Sequencing skeletal muscle structures based on size, the muscle fiber would be smaller than a myofibril but bigger than a fascicle.
false
Which of the following skeletal muscle structures would be the largest in size?
fascicle
Which of the following skeletal muscle structures would be the smallest in size?
filaments
Which sequence is in the correct order from largest to smallest?
muscle, fascicle, muscle fiber, myofibril
A triad consists of two terminal cisternae and a T tubule.
t
A twitch is a single contractile event in response to single action potential.
t
ATP causes the detachment of myosin from actin.
t
Motor unit recruitment is defined as increasing the number of motor units that are stimulated to contract.
t
Sequencing skeletal muscle structures based on size, the myofibril would be smaller than a muscle fiber but bigger than filaments.
t
T-tubules are finger-like invaginations of plasma membrane. They extend into interior of fiber and surround myofibrils.
t
The H zone disappears in a fully contracted muscle.
t
The I band only contains thin filaments.
t
The M line is the center point of attachment for thick filaments.
t
The axon terminal divides into synaptic end bulbs at the neuromuscular junction.
t
The motor end plate is an area of the sarcolemma across from synaptic end bulbs of axon terminal. It contains neurotransmitter receptors.
t
The perimysium is a connective tissue covering surrounding a fascicle.
t
The sarcolemma is the plasma membrane of the skeletal muscle fiber.
t
The sarcomere is an area from Z disc to Z disc.
t
The sarcomere is the smallest contractile unit within individual muscle fibers.
t
The sarcoplasmic reticulum stores calcium within the muscle fiber.
t
The synaptic end bulbs are the parts of the axon terminal that form the neuromuscular junction.
t
The H zone only contains thick filaments.
true
Using the biceps brachii to lift a glass off the table represents an example of a(n):
concentric isotonic contraction
Select the muscle fiber type with the largest diameter.
Fast glycolytic (FG)
Which muscle fiber type is low in myoglobin content?
Fast glycolytic (FG)
Which of the following structures experiences a decrease in length when the sarcomere shortens?
I band, H zone
This is the time between muscle fiber stimulation and measurement of force generation
Latent period
Which stimulus that results in maximal force generation?
Maximal stimulus
Muscle fibers that are red in color include:
Slow oxidative (SO)
Select the muscle fiber type that has the slowest myosin ATPase.
Slow oxidative (SO)
Select the muscle fiber type that is smallest in diameter.
Slow oxidative (SO)
These muscle fiber types are recruited first.
Slow oxidative (SO)
Which muscle fiber type generates ATP by aerobic respiration?
Slow oxidative (SO)
Which muscle fiber type has many capillaries?
Slow oxidative (SO)
This type of wave summation with partial relaxation is observed between twitches.
Unfused tetanus
The length of this sarcomere structure does not change when the sarcomere shortens.
a band
This area of the sarcomere is the length of the thick filaments.
a band
A _____ includes the motor neuron and all the muscle fibers it innervates.
motor unit
he inability of muscle fibers to contract after a long period of contraction is referred to as:
muscle fatigue
