Ch 6 Muscular System - 2018

If you compare electron micrographs of a relaxed skeletal muscle fiber and a fully contracted muscle fiber, which would you see only in the relaxed fiber? Choose 2.

• Z discs

• sarcomeres

• I bands

• A bands

• H zones

After ACh attaches to its receptors at the neuromuscular junction, what is the next step?

• Sodium channels open

• Calcium binds to regulatory proteins on the thin filaments.

• Cross bridges attach

• ATP is hydrolyzed

You ability to life that heavy couch would be increased by which type of exercise?

• aerobic

• endurance

• resistance

• swimming

Doing the pincer grasp is an _____ movement.

• extending

• abducting

• adducting

• opposing

Which are ways in which muscle names have been derived? Choose all that apply.

• attachments

• size

• function

• location

Choose all that apply. Cardiac muscle is:

• involuntary

• striated or banded appearance

• moves bones and facial skin

• referred to as the muscular system

• voluntary

Choose all that apply. Smooth muscle is:

• involuntary

• striated or banded appearance

• found in bladder, uterus, intestines, etc

• referred to as the muscular system

• voluntary

Choose all that apply. Skeletal muscle is:

• involuntary

• striated or banded appearance

• moves bones and facial skin

• referred to as the muscular system

• voluntary

Skeletal muscle is not involved in:

• movement of skin

• propulsion of a substance through a body tube

• heat production

• inhibition of body movement

Choose all that apply: Transmission of the stimulus at the neuromuscular junction involves:

• synaptic vescicles

• sarcolemma

• ACh

• axon terminal