Unit 4 Quiz 1 Review

Which of the following is not a function of the muscular system?

• movement

• light detection

• maintain posture

• heat generation

What is a sarcomere?

• contractile unit of muscle

• area between two intercalated discs

• wavy lines on a cell

• none of these

The epimysium is represented by letter?

• D

• A

• C

• B

The endomysium wraps the.....

• Whole muscle

• Myofibril

• Muscle fiber

• Fascicles

What is included in a motor unit?

• One motor neuron and several muscle fibers

• Muscle fibers only

• Motor neurons only

• Several motor neurons and several muscle fibers

The sarcoplasmic reticulum

• stores ACh.

• is located within the neuromuscular junction.

• envelops the sarcomere-containing myofibrils and stores calcium.

• is a contractile protein.

The organelle of a muscle fiber that is made of repeating units called sarcomeres is the

• sarcoplasmic reticulum

• Z-line

• myofibril

• myofilament

Cardiac muscle is found only in the _______________.

• heart

• lungs

• brain

• liver

Smooth muscle is

• voluntary

• involuntary

Smooth muscle is _______

• non-striated

• striated

• voluntary

• cardiac