Neurotransmission and Muscle Contraction Concepts

The neurotransmitter stored in the axon terminal identified as #3

• Acetylcholine
• Protein Channel
• Calcium Ion (Ca²⁺)
• Syanptic Cleft

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

• Neurotransmitter

• Acetylcholine

• Synaptic cleft

• Neuromuscular Junction

What type of chemical is number 7 pointing to?

• neurotransmitter

• an ACh receptor

• a neuron

• a cell wall

What is number 4 pointing to?

• synaptic cleft
• sarcolemma
• subneural clefts
• Ca++

The cell membrane of a skeletal muscle fiber is called the:

• sarcomere

• myofilament

• sarcolemma

• sarcoplasm

One neuron and all the skeletal muscle cells it stimulates is the ____ ___.

• Neurotransmitter

• Neuromuscular junction

• Motor unit

• Synaptic cleft

Once ACh binds to receptor cells on the sarcolemma, what takes place?

• Sarcolemma becomes temporarily permeable to sodium.

• The muscle contracts.

• Calcium is pumped into the axon terminal.

• Synaptic vesicles move to the end of the terminal.

Skeletal Muscle contraction is initiated when the ________ sends a message/signal to the muscle cell.  

• Muscle cell

• Motor Neuron

• Gland

• None of the above

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

• Synaptic cleft

• Neurotransmitter

• Motor unit

• Neuromuscular junction

The specialized part of the cell membrane of the muscle fiber identified as #5

• Sodium ion (Na⁺)

• Axon Terminal of Motor Neuron

• motor end plate

• Vesicle