Exam 2 Review (BIOL-5)

What is the contractile unit of the muscle?

Most joints in the body are freely moveable and classified as _____ joints

Which of the following occur during muscle contraction? (select all that apply)

• Release of calcium from sarcoplasmic reticulum

• Tropomyosin covers myosin binding site

• Acetylcholine released into synapse

• Cross bridge formation

• Actin and myosin filaments shorten

What is the role of calcium during a muscle contraction?

• Covers myosin binding sites

• Uncovers myosin binding sites

• Covers actin binding sites

• Uncovers actin binding sites

The type of involuntary muscle that lines the heart is the ___________ muscle.

• skeletal

• cardiac

• smooth

• bicep

Which system (collection of structures) is involved with emotional processing, memory formation, and some olfactory processing?

Bundles of skeletal muscle fibers, called ________, are found within each muscle.

The periosteum is responsible for (select all that apply)

• making bone more flexible

• supplying bone with blood vessels and nerves

• aiding in bone repair after a fracture

• storing red and yellow bone marrow

Power stroke will occur when

• ATP binds to myosin head

• Myosin head releases ADP and Pi

• Myosin head hydrolyse ATP

• Myosin binds to actin

The skeletal system has several jobs. Select one of the following that describe its jobs.

• send messages between the brain and the body

• makes red blood cells and stores minerals

• creates hormones

• carries blood through out the body