Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
33 Cards in this Set
- Front
- Back
|
What is the shape of a smooth muscle?
|
Spindle shaped cells of different sizes
|
|
|
What is the make up of smooth muscle?
|
Makes up the viscreal for involuntary muscles: such as walls of the intenstin and walls of the blood vessels
|
|
|
What does smooth muscle generate?
|
Peristalsis
|
|
|
In the cardiac muscle where is the neucli placed?
|
Centerally placed
|
|
|
What does the neucli look like?
|
Oval and Pale
|
|
|
Are the cardiac muscles striated or cross striated?
|
Cross striated
|
|
|
What do the skeletal muscles look like?
|
They are long tubular cells called Muscle Fibers and they contain many peripheral (to the side) placed neucli.
|
|
|
Epimysium
|
The most outer layer. Composed of connective tissue & hundreds of contractile cells called fibers. These fibers are surrounded by connective tissue called Endomysium.
|
|
|
Excitability
|
The ability to receive & respond to iimpulses from the external environment
|
|
|
Contractility
|
Muscles generate force when they contract & are able to shorten up on contraction
|
|
|
Extensibility
|
Muscles can be stretched
|
|
|
Elasticity
|
The ability of muscles to return to original shape
|
|
|
AutonomiA c Nervious System
|
Regulates involuntary vital funcation: Breathing, heart rate, digestionm, cellular transport.
|
|
|
Motor Neuron
|
A motor unit: Efferent nerve cell that transmitts nerve impulses & generates movement found in the skeletal muscle.
|
|
|
Tetanus
|
Coontractile stimulus that's received at the synapse and it rapidly & evenly commuicates to the whole fiber.
|
|
|
What does a healthy fiber look like?
|
Taughty and springy
|
|
|
Origin
|
Least moveable part of muscle that attaches to bone.
|
|
|
Insertion
|
More moveable part of muscle attached to bone. More distal
|
|
|
Muscle belly
|
The center area of the muscle fiber.
|
|
|
Tendon
|
Attaches muscle to bone
|
|
|
Ligament
|
Attaches bone to bone
|
|
|
Agonist
|
The prime mover
|
|
|
Antagonist
|
Opposition of the agonist. Provides stability and returns joint ot neutral position
|
|
|
Synergist
|
Muscle that stablizes joints during movement
|
|
|
Main dietary source for muscular energy
|
Fats/Sugar
|
|
|
ATP
|
Adenosine Triphosphate
|
|
|
What is ATP
|
Muscle needs energy to contract effectively. The ATP molecule stores energy which is released at the time of muscular contraction.
|
|
|
Isotonic
|
Muscular contraction with shortening of the muscle & movement of the joint.
|
|
|
Isometric
|
Muscle contraction without shortening of the muscle with no movement
|
|
|
The Cross Bridge
|
Actin & myosin are combined to produce force along with ATP. Creatin phosphate is also used.
Connection between A&M filaments is made with calcium |
|
|
Proprioceptors
|
These are specialized nerve receptors found in joint, tendons & muscle that sense that sense the body's position.
|
|
|
Golgi Tendon Organs
|
The tendon reflex engages to indicate a potential injury and helps to release the contraction.
|
|
|
What is a Sarcomere
|
A single unit of contraction in a muscle fiber.
|
