Exam 17: Muscle Contraction

Match each term with its corresponding definition or description. -Protein that looks like "bundled golf clubs"; makes up the thick myofilament

When sarcomeres shorten, myofibrils also shorten.

T-tubules are perpendicular to muscle fibers.

Endurance training usually results in muscle hypertrophy.

A contraction in which the tension within the muscle remains the same but the length changes is called a(n) _____ contraction.

Muscles with less than normal muscle tone are called spastic.

Muscle pain may also be referred to as muscular dystrophy.

Match each term with its corresponding description regarding the sliding-filament theory. -Chemical released by the motor neuron that initiates the stimulus for a muscle contraction

Match each term with its corresponding definition or description. -Inward extensions of the sarcolemma that allow impulses to go deeper into the cell

Acetylcholine is the neurotransmitter that stimulates muscle contraction.

An accumulation of lactate in the muscle is the result of an oxygen debt.

The difference between red and white fibers is the amount of glycogen.

Match each term with its corresponding description regarding the sliding-filament theory. -Protein that has receptor sites for an ion that causes it to change shape and pull another protein away from the receptor sites on the actin

Which of the following is an incorrect statement regarding heat production?

For continued, efficient nutrient catabolism by muscle fibers, both glucose and oxygen are required.

Which of the following is not a name for a muscle cell?

Convulsions are abnormal, uncoordinated tetanic contractions of varying groups of muscles.

Muscle fibers use creatine phosphate to restore their ATP population.

Cardiac fibers form a continuous electrically coupled mass called a syncytium.

From smallest to largest, which of the following is the correct order of arrangement?