Asked by michael makrop on Jun 29, 2024
Verified
The ____ causes muscles to contract or relax and glands to secrete products.
A) synaptic knob
B) axon diameter
C) neurotransmitter
D) interneuron
E) cell body
Neurotransmitter
A chemical within the vesicles of the synaptic knob that is released into the postsynaptic structures when a nerve impulse reaches the synaptic knob.
Synaptic knob
The expanded region at the end of an axon terminal, where neurotransmitters are released to communicate with other neurons or muscle cells.
Interneuron
A type of neuron that communicates only with other neurons, typically found within the central nervous system and plays a role in reflexes and neuronal circuits.
- Recognize how and where nerve impulses are generated and transmitted.
Verified Answer
GM
Glitter Mee CosmeticsJul 01, 2024
Final Answer :
C
Explanation :
Neurotransmitters are chemicals released by neurons at the synaptic knob. They cross the synaptic gap to transmit signals to other neurons, muscles, or glands, causing them to contract, relax, or secrete products.
Learning Objectives
- Recognize how and where nerve impulses are generated and transmitted.