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Response to stimulus- This is a muscle characteristic |
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Shorten when stimulated - Muscle characteristic |
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Muscle can be come stretched- muscle characteristic |
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Resemble resting length- characteristic of muscle |
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use muscle peristalsis- muscle function this is both voluntary and involuntary depending on what part of the tract you are in. |
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Heart and blood vessels. Remember that only the heart is made up of cardiac muscle. The blood vessels are made up of smooth muscle. this is a muscle function |
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Solid, liquid, passed though smooth muscle- This is a function of muscle. this is also involuntary until the last party which we do ourselves |
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Female mammary ducts and male ejaculation. surprisingly involuntary and is a function of muscle |
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When you work out your muscles heat up and keep you warm. also they constrict the blood vessels so that they control where your blood goes to keep you warm. - Muscle function |
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stabilization of Joints - muscle function |
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What this does is it helps you close holes in your body so that it keeps things out.
ex mouth, rectum, urethra, vagina
Function of muscle |
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Location: Walls of hollow organs ( digestive tract, blood vessels, bladder)
Involuntary except the part of ingesting and releasing.
It has one nucleus |
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Location: In the heart only
branches, cytoplasmic, inter connective. intercalated disks Involuntary |
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Striated Muscle
Location: Attached to bone.
Voluntary- You control the contraction and relaxation |
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All this is in the skeletal muscle
the length vary
Shape: multi-nucleated cell, Long and cylindrical shape, striated
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Sarcoplasmic Reticulum (SR)
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In the Muscle Fiber
They are canals wrapped around the myfibril
They hold calcium Ions which are released to make the muscle contract |
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This is what really contracts in a muscle cell. There are many of these that contract.
they have myofilaments which are actin, troponin, tropomyosin,and myosin |
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These are the thin fiaments which the myosin grab on to when it is exposed. |
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the thin wire that covers the tropomyosin and actin so the myosin can't grab it. |
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This is actually what the myosin grab on to. this is then Connected to the Actin |
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this consists of the z line, I Band(light line), A Band, H zone
[image] |
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More fixed proximal attachment of muscle |
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More movable distal attachment of muscle
more towards the origin |
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consist neuron muscle fiber it innervates (to communicate nervous energy to: stimulate though nerves)
This is where the muscle gets a message from the brain to contract or relax. it also involves the neuromuscular junction. |
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Chemical transmitter released by some nerve endings.
this starts the entire process of the contracting of the muscle. |
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Apply a single threshold impulse to a whole muscle
Latent Period: 1-2 msec
Contractoin: 5-50 msec
Relaxation: 5-50 msec |
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2 contractions. Will add to the force of the first contraction |
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Prolonged some contraction (smooth)
- stimulus of high-frequency at the peak.
muscle causing a prolonged smooth contraction represents a fusion of muscle twitches |
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warming up phenomenon
increased temperature |
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