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Muscles
Mucles
32
Anatomy
Undergraduate 1
11/17/2010

Additional Anatomy Flashcards

 


 

Cards

Term
Irritability 
Definition
Response to stimulus- This is a muscle characteristic 
Term
Contractibility
Definition
Shorten when stimulated - Muscle characteristic
Term
Extensibility
Definition
Muscle can be come stretched- muscle characteristic  
Term
Elasticity
Definition
Resemble resting length- characteristic of muscle
Term
Locomotion
Definition
the movement of muscle 
Term
Digestion 
Definition
use muscle peristalsis- muscle function this is both voluntary and involuntary depending on what part of the tract you are in.  
Term
Circulation
Definition
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
Term
Excretion
Definition
Solid, liquid, passed though smooth muscle- This is a function of muscle. this is also involuntary until the last party which we do ourselves 
Term
Reproduction
Definition
Female mammary ducts and male ejaculation. surprisingly involuntary and is a function of muscle  
Term
Heat 
Definition
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
Term
Posture
Definition
stabilization of Joints - muscle function 
Term
Guard External Orifices
Definition

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  

Term
Smooth Muscle
Definition

Location: Walls of hollow organs ( digestive tract, blood vessels, bladder)

Involuntary except the part of ingesting and releasing.

It has one nucleus  

Term
Cardicac
Definition

Location: In the heart only

branches, cytoplasmic, inter connective. intercalated disks  Involuntary

Term
Skeletal 
Definition

Striated Muscle 

Location: Attached to bone.

Voluntary- You control the contraction and relaxation 

Term
Muscle Fiber
Definition

All this is in the skeletal muscle 

the length vary

Shape: multi-nucleated cell, Long and cylindrical shape, striated 

 

Term

Sarcoplasmic Reticulum (SR)

 

Definition

In the Muscle Fiber

They are canals wrapped around the myfibril

They hold calcium Ions which are released to make the muscle contract 

Term
Myofibrils
Definition

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

Term
Actin
Definition
These are the thin fiaments which the myosin grab on to when it is exposed.
Term
Troponin
Definition
the thin wire that covers the tropomyosin and actin so the myosin can't grab it.
Term
Tropomyosin
Definition
This is actually what the myosin grab on to. this is then Connected to the Actin
Term
Sarcomere
Definition

this consists of the z line, I Band(light line), A Band, H zone 

 

[image]

Term
Origin
Definition
More fixed proximal attachment of muscle
Term
Insertion
Definition

More movable distal attachment of muscle

more towards the origin 

Term
Motor Unit
Definition

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. 

Term
Acetylcholine (Ach)
Definition

Chemical transmitter released by some nerve endings.

this starts the entire process of the contracting of the muscle. 

Term
Twitch
Definition

Apply a single threshold impulse to a whole muscle

Latent Period: 1-2 msec 

Contractoin: 5-50 msec

Relaxation: 5-50 msec

Term
Wave Summation
Definition
2 contractions. Will add to the force of the first contraction 
Term
Tetanus
Definition

Prolonged some contraction (smooth)

- stimulus of high-frequency at the peak.

muscle causing a prolonged smooth contraction represents a fusion of muscle twitches 

Term
Treppe
Definition

warming up phenomenon 

increased temperature 

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