Question

use the following information to answer question 10. a synapse between a dendrite and an axon 10. match the labelled synapse structure with the correct structure or function. place the correct number in each blank. use each answer only once. postsynaptic membrane; of the dendrite; “after” the synapse 1. structure b mitochondria; supply atp for synthesis of transmitters 2. structure a synaptic cleft; the synapse; a gap 3. structure e presynaptic membrane; of the axon; “before” the synapse 4. structure c receptor site for the neurotransmitter (dendrite) 5. structure h neurotransmitter; the chemical messenger 6. structure j acetylcholinesterase; an enzyme that breaks down ach (acetylcholine) 7. structure g synaptic vesicle containing the neurotransmitter ach (acetylcholine) 8. structure d neurotransmitter released by exocytosis from a vesicle 9. structure f axon terminal; the axon knob 10. structure i hint: use figure 11.18 on page 379 or (sr) to assist.

Explanation:

• Structure B is mitochondria which supply ATP for synthesis of transmitters.
• Structure A is the axon terminal/axon knob.
• Structure E is the synaptic vesicle containing the neurotransmitter ACh.
• Structure C is the presynaptic membrane of the axon.
• Structure H is the postsynaptic membrane of the dendrite.
• Structure J is the receptor site for the neurotransmitter on the dendrite.
• Structure G is the synaptic cleft.
• Structure D is the neurotransmitter (the chemical messenger).
• Structure F is acetylcholinesterase which breaks down ACh.
• Structure I is the neurotransmitter released by exocytosis from a vesicle.

Answer:

1. mitochondria; supply ATP for synthesis of transmitters
2. axon terminal; the axon knob
3. synaptic vesicle containing the neurotransmitter ACh (acetylcholine)
4. presynaptic membrane; of the axon; "before" the synapse
5. postsynaptic membrane; of the dendrite; "after" the synapse
6. receptor site for the neurotransmitter (dendrite)
7. synaptic cleft; the synapse; a gap
8. neurotransmitter; the chemical messenger
9. acetylcholinesterase; an enzyme that breaks down ACh (acetylcholine)
10. neurotransmitter released by exocytosis from a vesicle