Lesson Sarcomere

Multiple Choice

Plasma membrane in muscle cell

• sarcolemma

• sarcoplasma

• sarcoplasmic reticulum

• sarcomere

• actin

Multiple Choice

Fluid part of a muscle cell (fiber)

• sarcolemma

• sarcoplasma

• sarcoplasmic reticulum

• sarcomere

• actin

Multiple Choice

Thin myofilament made of contractile protein

• sarcolemma

• sarcoplasma

• sarcoplasmic reticulum

• sarcomere

• actin

Multiple Choice

A bundle of muscle fibers is known as a...

• fascicle
• sarcomere
• tendon
• epimysium

Multiple Choice

Another name for a muscle cell is...

• muscle fiber
• fascicle
• sarcomere
• thick filament

Multiple Choice

The connective tissue that surrounds the entire muscle is called...

• epimysium
• perimysium
• endomysium

Multiple Choice

The connective tissue that surrounds fascicles is called...

• epimysium
• perimysium
• endomysium

Multiple Choice

The basic functional unit of a muscle fiber separated by the Z lines is called _____.

• sarcolemma
• sarcomere
• filaments
• myofibril

Multiple Choice

Myofibrils are made up of two types of proteins known as?

• Actin and Myosin
• Troponin and Tropomyosin
• Myoglobin and hemoglobin
• none of these

Multiple Choice

What is number 4?

• perimysium
• muscle fiber
• fascicle
• endomysium

Multiple Choice

What structure is shown here?

• neuromuscular junction

• sarcomere

• origin and insertion

• synaptic cleft

Multiple Choice

What is the smallest unit of a muscle to contract?

• Sarcomere
• Myofibril
• Muscle fiber
• Myofilaments

Multiple Choice

Which myofilament is attached to the z line?

• Actin
• Myosin

Multiple Choice

Which part of a sarcomere contains only thick filaments?

• I band
• A band
• H zone
• Z zone

Multiple Choice

Which part of a sarcomere contains only thin filaments?

• I band
• A band
• H zone
• M zone

Multiple Choice

Which part of the sarcomere is the line down the middle of the myosin?

• Z line
• I band
• M line

Multiple Choice

The point at which the nerve cell reaches the sarcolemma of the muscle fiber is the _____.

• Neurotransmitter

• Acetylcholine

• Synaptic cleft

• Neuromuscular Junction

Multiple Choice

The gap between the nerve cell and sarcolemma is the ____ ___.

• Synaptic cleft

• Neurotransmitter

• Motor unit

• Neuromuscular junction

Multiple Choice

What is the specific neurotransmitter that stimulates the movement of skeletal muscles?

• GABA

• Acetylcholine

• Serotonin

• Dopamine

Multiple Choice

Once calcium is pumped into the axon terminal what happens?

• The muscle contracts

• ACh is released into the synaptic cleft.

• Sodium pumps into the sarcolemma.

• The muscle contracts.

Multiple Choice

What is the name of the component that houses the neurotransmitters?

• Synaptic cleft

• Acetylcholine

• Receptors

• Synaptic vesicles