Chapter 9 Anatomy Review Questions

One motor neuron and all the muscle fibers it supplies is considered a

• motor unit
• muscle twitch
• muscle tension
• neuromuscular junction

The force exerted by a contracting muscle on an object is called

• motor unit
• muscle twitch
• muscle tension
• neuromuscular junction

The region where the motor neuron contacts the skeletal muscle is called

• motor unit
• muscle twitch
• muscle tension
• neuromuscular junction

The response of a muscle to a single stimulation

• motor unit
• muscle twitch
• muscle tension
• neuromuscular junction

A fused tetanus occurs when

• there is no relaxation between stimuli
• the second twitch of a contraction will be stronger than the first
• the degree of wave summation become greater and greater in a quivering contraction
• the second stimulus delivered after relaxation is complete but does not produce summation

An unfused tetanus occurs when

• there is no relaxation between stimuli
• the second twitch of a contraction will be stronger than the first
• the degree of wave summation become greater and greater in a quivering contraction
• the second stimulus delivered after relaxation is complete but does not produce summation

Muscles that change in length when contracted are considered

• isotonic
• isometric
• temporal
• twitch

Which of the following regenerate the most ATP for work?

• direct phosphorylation
• lactic acid formation
• aerobic respiration

ATP is formed from creatine phosphate

• in the first 10 seconds of short- duration, high intensity exercise
• after 10 seconds of short- duration, high intensity exercise
• during prolonged duration exercise

Which of the following does NOT typically cause muscle fatigue?

• Ionic Imbalances
• Increased organic phosphate
• Complete deprivation of ATP
• Decreased glycogen