Chapter 10: Cody Study Guide

The muscles that are most directly involved in bringing about a movement are called which of the following?

• synergist

• agonist

• antagonist

• moment arm

A lever is defined as which of the following?

• a prime mover

• the agonist

• an eccentric muscle action followed by a quick concentric muscle action

• a rigid structure that moves on a fixed point called the fulcrum

The replacement of type II fibers with fat is termed which of the following?

• sarcopenic obesity

• severe obesity

• rhabdomyolysis

• myostatin inhibition

Muscle hypertrophy is defined as which of the following?

• muscular enlargement from an increase in available energy in the muscle

• increase in the number of muscle fibers via longitudinal fiber splitting

• increase in the cross-sectional area of the existing fibers

• increase in number of connective tissue in the muscle

When a muscle lengthens as it contracts, this is known as a .

• concentric contraction

• isometric contraction

• eccentric contraction
• isokinetic contraction

An isometric muscle action is a muscle .

• lengthens because the contractile force is less than the resistive force

• does not change length because the contractile for
• shortens because the contractile force is greater than the resistive force

• does not change because the both the agonist and the antagonist are relaxed

Flexibility is defined as .

• the ability of a muscle fiber to respond rapidly to a chemical or electrical signal

• the capacity of the muscle to stretch to the normal resting length after contracting

• the ability to move a joint through a full range o
• the ability to return to its original resting length after a stretch

A muscle contraction wherein the muscle shortens because the contractile force is greater than the resistive force

• cocentric

• eccentric

• isometric

A muscle contraction wherein the muscle lengthens because the contractile force is less than the resistive force

• cocentric

• eccentric

• isometric

A muscle contraction wherein the muscle length does not change because the contractile force is equal to the resistive force

• cocentric

• eccentric

• isometric