How Muscle Fibers Contract - HOW NERVES CAUSE MUSCULAR CONTRACTION- The Neuro-Muscular Junction or Synapse Flashcards
1
Q
Each muscle fiber in a muscle has contact with
a nerve cell. This muscle-nerve interaction is called the synapse.
What is it called?
A
The Neuro-Muscular Junction or Synapse
2
Q
The synapse has 3 important parts:
A
Presynaptic Terminal
Postsynaptic Terminal
Synaptic Cleft/Gap
3
Q
Enlarged end of nerve cell
A
Presynaptic Terminal
4
Q
Part of the muscle cell’s sarcolemma
A
Postsynaptic Terminal
5
Q
A.K.A. Terminal knob/Synaptic Knob
A
Presynaptic Terminal
6
Q
Tiny gap/space between the two terminals
A
Synaptic Cleft/Gap
7
Q
Contains acetylcholine receptors, which are sodium channels (allow sodium into cell)
A
Postsynaptic Terminal
8
Q
Contains neurotransmitter acetylcholine
A
Presynaptic Terminal
9
Q
What is a Presynaptic Terminal?
A
Nerve
10
Q
What is a Postsynaptic Terminal?
A
covering muscle
