Question

a) identify a, b and c? b is a space
b) what do structures a contain?
image of a bulbous structure separated from a flat structure by a gap. arrow a points to tiny sacs, arrow b pointing to a space, arrow c pointing to a bean shaped structure.
© morton publishing company

Explanation:

(for part A):
This is a diagram of a synapse (neuronal junction). In a synapse:

• A: Synaptic vesicles. These are small sacs in the presynaptic neuron that store neurotransmitters.
• B: Synaptic cleft. It is the space (gap) between the presynaptic and postsynaptic neurons where neurotransmitters diffuse.
• C: Mitochondrion. Mitochondria provide energy (ATP) for the synaptic processes, like neurotransmitter synthesis and vesicle transport.

(for part B):
Structure A (synaptic vesicles) contains neurotransmitters. Neurotransmitters are chemical messengers (e.g., acetylcholine, dopamine, serotonin) that are released into the synaptic cleft to transmit signals from the presynaptic neuron to the postsynaptic neuron.

Part A Answer:

A: Synaptic Vesicles, B: Synaptic Cleft, C: Mitochondrion

Part B Answer:

Structure A (synaptic vesicles) contains neurotransmitters.

Answer:

(for part B):
Structure A (synaptic vesicles) contains neurotransmitters. Neurotransmitters are chemical messengers (e.g., acetylcholine, dopamine, serotonin) that are released into the synaptic cleft to transmit signals from the presynaptic neuron to the postsynaptic neuron.

Part A Answer:

A: Synaptic Vesicles, B: Synaptic Cleft, C: Mitochondrion

Part B Answer:

Structure A (synaptic vesicles) contains neurotransmitters.