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;
27 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
PRIMARY FUNCTION OF MUSCLE TISSUE
|
The prime function of muscle tissue is to change chemical energy into mechanical energy to perform work.
|
Function is to perform work.
|
|
|
THREE TYPES OF MUSCLE TISSUE
|
Three types of muscle tissue is skeletal, smooth and cardiac.
|
Three types of muscle tissue.
|
|
|
SKELETAL MUSCLE TISSUE
|
Skeletal muscle tissue is primarily attatched to bones. Mostly voluntary. Striated.
|
Three qualities
|
|
|
CARDIAC MUSCLE TISSUE
|
Cardiac muscle tissue forms the wall of the heart. Striated. Involuntary movement.
|
Heart.
|
|
|
SMOOTH MUSCLE TISSUE
|
Smooth muscle tissue primarily located in walls of hollow organs. Involuntary movement. Nonstriated.
|
Nonstriated.
|
|
|
MAJOR FUNCTIONS OF MUSCLE TISSUE
|
Helps with locomotion. Posture stability.
Thermoregulation. Move substances in body. Regulate organ volume. |
Five functions of muscle tissue.
|
|
|
SPECIAL PROPERTIES OF MUSCLE TISSUE.
|
Electrical excitability.
Contractability. Extensibility. Elasticity. |
Four special properties.
|
|
|
ELECTRICAL EXCITABILITY
|
Electrical excitability: ability of tissue to respond to stimuli produced by action potentials.
|
Electricity.
|
|
|
CONTRACTABILITY
|
Contractability: ability of muscle to generate tension to do work.
|
What is the purpose of muscle contraction?
|
|
|
EXTENSIBILITY
|
Extensibility: ability of muscle to extend (stretch).
|
Extension.
|
|
|
ELASTICITY
|
Elasticity: ability for muscle to return to original shape after having been extended or contracted.
|
Rubber band.
|
|
|
CONNECTIVE TISSUES SURROUNDING MUSCLE TISSUE
|
Connective tissues surrounding muscle are the epimysium, perimysium and endomysium.
|
Epimysium, perimysium and endomysium.
|
|
|
EPIMYSIUM
|
Epimysium covers the entire muscle.
|
Epi means upon.
|
|
|
PERIMYSIUM
|
Perimysium covers entire fascicle.
|
Peri means around.
|
|
|
ENDOMYSIUM
|
Endomysium covers muscle fibers.
|
Endo means within.
|
|
|
ANATOMY OF A SKELETAL MUSCLE FIBER
|
A skeletal muscle consists of individual muscle fibers (cells) bundled into fascicles and surrounded by three connective tissue layers that are extensions of the deep fascia.
|
Muscle cells. Fascicles. Deep fascia.
|
|
|
SCHEMATIC OF SKELETAL MUSCLE
|
The organization hierarchy of skeletal muscle is as follows:
Single celled muscle fiber Myofibril(more subdivisions) |
|
|
|
BREAKDOWN OF MYOFIBRILS
|
Myofibrils consist of A Bands, H Bands, I bands, Z disks and sarcomeres.
|
ZIAH
|
|
|
MYOFIBRIL
|
A threadlike structure, extending longitudinally through a muscle fiber (cell) consisting mainly of thick filaments (myosin) and thin filaments (actin, troponin and tropomyosin).
|
Intricate structure.
|
|
|
SARCOMERE
|
Basic functional unit of a myofibril.
|
Basic unit of myofibril.
|
|
|
H BANDS
|
Narrow center of each A Band that contains thick but not thin filaments.
|
|
|
|
I BANDS
|
Lighter, less dense area of muscle cell that contains only thin filaments, but no thick filaments.
|
|
|
|
A BANDS
|
Darker middle part of sarcomere. Extends entire length of thick filaments.
|
|
|
|
SARCOPLASMIC RETICULUM
|
A fluid filled system of membranous sacs that encircles each myofibril.
|
|
|
|
SARCOPLASM
|
The cytoplasm of a muscle fiber.
|
|
|
|
MYOSIN
|
Myosin functions as a motor protein in all three types of muscle tissue.
|
|
|
|
ACTIN
|
Actin
|
|
