Muscles
This and That
A&P
A&P
A&P
100
______ surrounds each muscle fasciculus, whereas ______ surrounds each muscle fiber.
What is Perimysium, endomysium
100
What muscle types is both voluntary and striated?
What is Skeletal muscle
100
Myofibrils are composed of repeating contractile elements called __________.
What is sarcomeres
100
The most efficient means of producing ATP is
What is aerobic respiration
100
The thick myofilament consists of many molecules of this protein.
What is myosin
200
The basic structural and functional unit of skeletal muscle is the
What is sarcomere.
200
Present in skeletal muscle cells, but absent in most other cells?
What is Myoglobin
200
When an action potential arrives at the neuromuscular junction, the most immediate result is __________. see page (285-293)
What is the release of acetylcholine from the motor neuron
200
The ability of the muscle cell to stretch under tension is known as
What is extensibility.
200
This chemical carries the stimulating message across the neuromuscular junction.
What is acetylcholine
300
Contains overlapping actin and myosin myofilaments?
What is A band
300
The final "go" signal for skeletal muscle contraction is __________.
What is an increase in intracellular calcium ion levels
300
Properly controlled skeletal muscle contractions produced by changing the frequency of stimulation or the strength of stimulation are accomplished by __________.
What is graded muscle response
300
The ability of the muscle cell to return to its initial length after being stretched is called ________________.
What is elasticity
300
The head of myosin attach to actin to form a
What is cross-bridge.
400
To establish the resting membrane potential,
What is potassium ions diffuse out of the cell.
400
The thin myofilaments of skeletal muscle are composed chiefly of __________.
What is Actin
400
What would occur if a muscle became totally depleted of ATP?
What is The muscle would remain in a contracted state due to an inability to break actin-myosin cross bridges.
400
The segment from one Z disc to the next is called a(n)
What is sarcomere.
400
The type of muscle contraction where the muscle contracts but exhibits no change in length is called
What is isotonic contraction.
500
1.Functional unit of a skeletal muscle fiber 2.Area of the sarcomere with overlapping thick and thin filaments 3.Area of the sarcomere containing only thin filaments 4.Area in the center of the A band containing only thick filaments
What is sarcomere, A band, I band, H band
500
The __________ are extensions of the sarcolemma, and serve as a rapid communication system that ensures that every myofibril in the muscle fiber contracts at virtually the same time.
What is T tubules
500
slow oxidative muscle fiber fast oxidative muscle fiber fast glycolytic muscle fiber
What is fatigue resistant , moderately fatigues quickly fatigue resistant ,
500
Visceral muscle is also known as
What is single-unit smooth muscle.
500
Myofibrils are composed of repeating contractile elements called __________.
What is sarcomeres
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