CH 10: skeletal muscle cells and friends

What causes skeletal muscle cells to contract?

• acetylcholine

• calcium

• atp

• sodium

What is the place called where a motor neuron stimulates a muscle cell?

• motor end plate

• sarcomere

• t-tubules

• synaptic cleft

How are skeletal muscle cells are electrically insulated from each other?

• the endomysium

• the epimysium

• the perimysium

• mitocondria

What is a motor neuron?

• a specialized type of brain cell called neurons located within the spinal cord and the brain.

• a specialized type of skeletal cell called neurons located within the spinal cord and the brain.

• a specialized type of muscle cell called neurons located within the spinal cord and the brain.

• a specialized type of skin cell called neurons located within the spinal cord and the brain.

What part of the motor neuron carries impulses to the muscle?

• axon

• python

• t-tubules

• synaptic cleft

Match the following:

• axon terminal

• The swollen distal end of the motor neuron axon.

• t-tubules

• The space between the axon terminal and the motor end

  plate.

• synaptic cleft

• Invaginations of the sarcolemma penetrating deep into the

  interior of the muscle cell.

• sacrolemma

• The muscle cell membrane.

Match the following:

• sacromere

• A folded region of the sarcolemma at the neuromuscular

  junction.

• Synaptic Vessicles

• The contractile unit of the muscle cell that extends from one

  Z line to the next.

• terminal cisternae

• Structures within skeletal muscle cells that serve as

  reservoirs of calcium ions.

• motor end plate

• Structures within the axon terminal that contain the

  neurotransmitter acetylcholine.

Where is myosin found in skeletal muscle cells?

• thick filaments

• thin filaments

• in the T tubules

• in the terminal cisternae

Each tubulin subunit on actin contains binding sites for

(it is plural)

(a)  

Which of the following will attach to myosin?

(a)