뒤로Ch.10
이 집합의 용어 (23)
Striations are from what?
Contractile protein arrangements
What is allowing muscle to be stretched without damage?
extensibility
Dendrites __________ signals from other neurons
receive
Which CT covers individual muscle fibers within a muscle?
endomysium
Fascicle arrangement is correlated to:
the force generated by a muscle and affects the range of motion
In the myofibril where are thick filaments predominantly located?
A band
A main function of muscle is to convert chemical energy to mechanical energy. Which property of muscles relates most directly to this function?
contractility
Which region is the same length as the actin filament?
From the edge of the H zone to the Z disc
Which is not found in the A band?
-M Line
-H Zone
-Z Disc
-Areas w/ both actin & myosin
Z disc
Which event initiates the excitation process in skeletal muscle fibers?
Reception of the nerve signal at the neuromuscular junction
_____________ initiates the excitation process by receiving the nerve signal
neuromuscular junction
The _________ _________ forms a synapse with the muscle fiber at the neuromuscular junction
motor neuron
Voltage gated channels respond to the depolarization of an action potential by releasing Ca2+. Where are these channels located?
sarcoplasmic reticulum
In a skeletal muscle fibers, which structure would you expect to have the greatest total surface area?
sarcoplasmic reticulum
Which phase of contraction links the action potential in the sarcolemma to the activation of the myofilament?
excitation-contraction coupling
As a result of ACh stimulation, calcium ions are released from the ________.
sarcoplasmic reticulum
If a muscle cell is stimulated to contract, allowed to partially relax, then stimulated again, its force of contraction the second time will be ___________.
higher
The cytoplasm of a skeletal muscle cell has a specific name and is known as _________
sarcoplasm
The _______ is the structural component of the sarcomere that anchors the actin and defines the boundary between adjacent sarcomeres.
Z disc
________ contains the length of the myosin, the _______is the center of the sarcomere where myosin are linked, and the ______ is the region within the A band where only thick filaments are present.
A band, M line, H zone
What is the role of calcium ions in the neuromuscular junction?
To open voltage-gated calcium channels
Myoglobin requires ___ oxygen tension for oxygen release.
low
What is the main form of stored energy found in muscle cells?
creatine phosphate