EXSC 191 FINAL TEST 2026 QUESTIONS WITH CORRECT
ANSWERS GRADED A+
● Muscle Fiber Types. Answer: Classification of skeletal muscle fibers by speed and
metabolism
● Type I Fibers. Answer: Slow-twitch oxidative fibers resistant to fatigue used in endurance
activities
● Type II Fibers. Answer: Fast-twitch fibers generating force quickly used in power and
speed activities
● Type IIa Fibers. Answer: Intermediate fast-twitch fibers with moderate endurance and
power capacity
● Type IIx Fibers. Answer: Most powerful fastest fatigue most quickly fiber type
● Motor Unit. Answer: Single motor neuron and all the muscle fibers it innervates
● Size Principle. Answer: Recruitment of motor units from smallest to largest as force
demand increases
● Muscle Hypertrophy. Answer: Increase in muscle fiber size from resistance training
● Muscle Atrophy. Answer: Decrease in muscle fiber size from disuse or disease
● Muscle Spindle. Answer: Sensory receptor detecting muscle stretch triggering the stretch
reflex
● Golgi Tendon Organ. Answer: Sensory receptor detecting muscle tension inhibiting
contraction to prevent injury
● Stretch Reflex. Answer: Involuntary contraction in response to rapid muscle stretching
● Reciprocal Inhibition. Answer: Relaxation of an antagonist muscle when the agonist
contracts
● Agonist. Answer: Primary muscle producing a movement
● Antagonist. Answer: Muscle opposing the primary mover
ANSWERS GRADED A+
● Muscle Fiber Types. Answer: Classification of skeletal muscle fibers by speed and
metabolism
● Type I Fibers. Answer: Slow-twitch oxidative fibers resistant to fatigue used in endurance
activities
● Type II Fibers. Answer: Fast-twitch fibers generating force quickly used in power and
speed activities
● Type IIa Fibers. Answer: Intermediate fast-twitch fibers with moderate endurance and
power capacity
● Type IIx Fibers. Answer: Most powerful fastest fatigue most quickly fiber type
● Motor Unit. Answer: Single motor neuron and all the muscle fibers it innervates
● Size Principle. Answer: Recruitment of motor units from smallest to largest as force
demand increases
● Muscle Hypertrophy. Answer: Increase in muscle fiber size from resistance training
● Muscle Atrophy. Answer: Decrease in muscle fiber size from disuse or disease
● Muscle Spindle. Answer: Sensory receptor detecting muscle stretch triggering the stretch
reflex
● Golgi Tendon Organ. Answer: Sensory receptor detecting muscle tension inhibiting
contraction to prevent injury
● Stretch Reflex. Answer: Involuntary contraction in response to rapid muscle stretching
● Reciprocal Inhibition. Answer: Relaxation of an antagonist muscle when the agonist
contracts
● Agonist. Answer: Primary muscle producing a movement
● Antagonist. Answer: Muscle opposing the primary mover
