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Chapter 6 2014
A muscle which assists another in an
action is called a(n):
A muscle which does most of the work
is called:
A muscle which opposes the action
of another muscle is called the:
Muscles are covered by several layers
of fibrous connective tissue called:
Skeletal muscles are named according
to:
What is the function of ligaments?
What muscle is called the "kissing"
muscle?
What muscle is used for blinking and
squinting?
What is the function of the
Intercalated disks with gap junctions?
The structure in cardiac muscle
which allows contractions to
spread quickly are:
Identify the type of muscle
contraction
• When the tension of the muscle fiber is used
only to support rather than lift a load.
Sarcolemma
Sarcoplasm
Is a red pigment that stores oxygen
for muscle contraction
Is a polysaccharide that stores energy
for muscle contraction
According to sliding filament theory
when a muscle fiber contracts, what
happens
Identify the type of muscle contraction
• When the tension of muscle fibers is sufficient
to lift a load, many fibers change length as
they lift the load.
Identify all the chemicals involved in
muscle contraction.
Where is myosin found in skeletal
muscle fiber?
What two important binding sites are
found on cross bridges of myosin?
The thin filament consists of three
protein molecules, name them:
Actin contains binding sites for:
What is the function of
tropomyosin?
What is the function of troponin?
What causes tropomyosin to move
away from myosin binding sites on
actin?
What causes the myosin binding
sites on actin to be exposed?
What causes the tropomyosin to
cover back over actin binding sites?
What is required to move calcium
ions from sarcoplasm back into
sarcoplasmic reticulum?
After a sarcomere has contracted fully
and calcium ion concentration within
cytosol decreases what happens
within the sarcomere?
What causes skeletal muscles to
contract?
What is a motor neuron?
What part of motor neuron carries
impulses to muscle?
Invaginations of sarcolemma
penetrating deep into interior of
muscle cell are called:
The space between axon terminal
and motor end plate
The swollen distal end of motor
neuron axon
The muscle cell membrane
Structures within axon terminal that
contain neurotransmitter acetylcholine
The contractile unit of muscle fiber
that extends from one Z line to the
next is called:
Identify the structures within
skeletal muscle fibers that serve as
reservoirs of calcium ions
A folded region of sarcolemma at
neuromuscular junction is called?
What is first event in
neuromuscular junction?
What happens at neuromuscular
junction when action potential
arrives at axon terminal?
What happens to acetylcholine
after is released from its receptor
on the motor end plate?
what happens as an action potential
moves down T-tubules?
What happens when calcium ions
are present in cytosol of muscle
fiber?
What is Power stroke?
What is the role of ATP during
muscular contraction?
Occurs at death because muscles
cannot relax without ATP
The striations observed in skeletal and
cardiac muscles are produced by:
Myosin binds to actin:
A motor neuron and all of the
muscle fibers that it innervates is
called:
Nerve impulses travel to the muscles
from the spinal cord through:
List the events that occur during
muscle contraction, the power-stroke:
At a neuromuscular junction, nerve
impulses cause:
Explain the effect of Botox