Chp 10 Flashcards
(14 cards)
What are the five unique properties of muscle tissue?
The five unique properties of muscle tissue are: excitability, contractility, extensibility, elasticity, and adaptability.
What are the roles of skeletal muscle in the body?
Skeletal muscle functions include movement, posture maintenance, joint stabilization, heat generation, and protection of internal organs.
What are the levels of organization in a skeletal muscle?
The levels of organization in a skeletal muscle are: muscle fibers, fascicles, muscle, and muscle groups.
How are muscles attached to other body structures?
Muscles are attached to other body structures via tendons, which connect muscle to bone.
What are the components of muscle fibers?
Components of muscle fibers include myofibrils, sarcomeres, sarcoplasmic reticulum, and mitochondria.
What is the structure of a neuromuscular junction?
A neuromuscular junction consists of a motor neuron terminal, synaptic cleft, and muscle fiber membrane.
What is a motor unit?
A motor unit is composed of a motor neuron and the muscle fibers it innervates.
What are the four fascicle organizational patterns in skeletal muscle?
The four fascicle organizational patterns are parallel, pennate, circular, and convergent.
What occurs during muscle atrophy?
Muscle atrophy is the decrease in muscle mass and strength due to disuse or disease.
What occurs during muscle hypertrophy?
Muscle hypertrophy is the increase in muscle size and strength due to resistance training.
What are the characteristics of the three types of levers in the body?
The three types of levers are: first class (fulcrum in the middle), second class (load in the middle), and third class (effort in the middle).
How do interacting skeletal muscles initiate or prevent movement?
Interacting skeletal muscles work in pairs; one muscle contracts to initiate movement while the other relaxes or opposes to prevent unwanted movement.
How do muscle names incorporate various features?
Muscle names may reflect appearance, location, function, orientation, and unusual features.
What are the similarities and differences among the three types of muscle tissue?
The three types of muscle tissue are skeletal (voluntary, striated), cardiac (involuntary, striated), and smooth (involuntary, non-striated).
