Last Muscle Study Quiz

Myofibrils

• Are located in the muscle fiber
• Are contractile units
• Have striation
• Have all of the above

ACH (acetylcholine) is released by

• the muscle fibers
• the sarcolemma
• nerve fibers

The general name given to chemicals stored at the end of the nerve fibers

• mitochondria
• sarcoplasm
• neurotransmitters
• none of the above are correct

The motor neuron and the muscle fiber it controls is called the

• nerve fiber
• neuromuscular junction
• motor unit

This inhibits the formation of linkages when the muscle fiber is at rest

• Troponin
• Tropomyosin
• Acetylcholine

There would be _______ motor units in the eye than in the back.

• More
• Fewer
• Same

What are the sources of ATP for muscle contraction

• ADP and insulin
• Creatine Phosphate and mitochondria
• motor neurons and glucose

This is another name for fast-twitch or fast contracting muscle

• Red muscle
• White muscle
• Brown muscle

These are both located on the actin filament

• ATP and ADP
• Acetylcholine and cholinesterase
• Tropomyosin and Troponin

Muscle fibers that have an increased respiratory capacity are also known as

• Fast twitch muscle fibers
• Slow twitch muscle fibers
• Medium twitch muscle fibers