Muscular System Chapter 9 Review

what is the anchor point for the thin myofilaments

a plate or disc called a z-disc

This protein makes up the thin myofilaments

actin

Describe what occurs when a skeletal muscle contracts?

After forming cross bridges with the actin myofilament, the myosin myofilament propels the actin myofilament toward the center of the sacromere

What type of muscle is found only in the heart?

Cardiac muscle

This type of muscle appears striped, or striated, when viewed under a microscope

Cardiac muscle, skeletal muscle

A flat sheet of connective tissue that attaches a muscle to another muscle is:

aponeurosis

This muscle consists of short, branching fibers that fit together at intercalated discs

cardiac muscle

This (these) type of muscle(s) are known as involuntary muscles

cardiac, smooth

In (blank) attachment, muscle fibers merge with the periosteum of the bone

direct

A tendon is an extension of what muscle component?

epimysium

At rest, muscles obtain most of their energy by metabolizing:

fatty acids

A single muscle cell is called a:

muscle fiber

A continuous state of partial muscle contraction in which muscles are at their optimal resting length is called:

muscle tone

thin and thick myofilaments make up these

myofibrils

This protein makes up the thick myofilaments

myosin

the connection between the motor neuron and a muscle fiber is called a (blank) junction

neuromuscular

The prime mover for knee extension is the:

quadriceps femoris

myofibrils are ararnged to form units called

sacromeres

The cytoplasm of a muscle cell is:

sacroplasm

This (these) type of muscle(s) are known as voluntary muscles

skeletal

This type of muscle is attached to bone and causes movement of the body

skeletal muscle

This type of muscle does not appear striped, so it is called nonstriated

smooth muscle

This type of muscle is found in the digestive tract, blood vessels, and airways

smooth muscle

a muscle that assists another muscle is called

synergist

a strong, fibrous cord that attaches muscle to bone is called a:

tendon

The condition of rapid contraction with only partial relaxation is called incomplete (blank)

tetanus

During the process of muscle contraction, the sacroplasmic reticulum is stimulated to release which substance?

Calcium

Which muscle is often called the "praying muscle" because of its role in flexing the head?

Sternocleidomastoid

The prefix bi- in a muscle name, such as in biceps brachii, refers to the fact that the muscle:

has two origins

The end of a muscle that's attached to the more mobile bone is called the;

insertion

Contraction in which the tension within a muscle increases while its length remains the same is:

isometric

Contraction in which the muscle changes lngth while the tension remains the same is:

isotonic

The continuous state of partial muscle contraction is called muscle (blank)

tone