18 Questions
What type of muscle contraction occurs when the amount of tension increases despite the muscle length remaining the same?
Isometric
What is the primary function of myoglobin in muscle fibers?
To help bind oxygen in muscle
What is the term for the non-movable end of a skeletal muscle?
Origin
Which type of muscle fiber contracts quickly and is adapted for anaerobic respiration?
Fast twitch fiber
According to the all or none law, what is the characteristic of a muscle contraction?
It contracts or doesn't contract, with no in between
How are muscles typically named in human anatomy?
According to their location
What is the primary function of ligaments in the human body?
To bind bone to bone
Which of the following is a characteristic of skeletal muscle fibers?
Many nuclei per cell
What is the term for the ability of muscles to recoil to their original shape after contraction?
Elasticity
Which of the following is a type of connective tissue that surrounds each muscle fiber?
Endomysium
What is the name of the cell membrane that surrounds muscle fibers?
Sarcolemma
What percentage of body weight does skeletal muscle make up?
40%
What is the primary role of calcium in muscle contraction?
To bind to troponin and expose attachment sites for myosin
During muscle contraction, what is the primary function of ATP?
To provide energy for the sliding of actin and myosin filaments
What is the term for the shortening of a muscle fiber due to the contraction of its sarcomeres?
Muscle contraction
What is the name of the enzyme that breaks down acetylcholine, leading to muscle relaxation?
Acetylcholinesterase
What is the structure that allows the electrical impulse to reach the sarcoplasmic reticulum and trigger muscle contraction?
T tubules
What is the term for the process by which actin and myosin filaments slide past each other, resulting in muscle contraction?
Sliding filament theory
Test your knowledge of skeletal muscle structure and function, including muscle contraction, sarcomeres, and muscle physiology principles. Learn about the H zone, I band, A band, and more. Quiz yourself on muscle anatomy and physiology concepts.
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