Asked by Shoania Williams on May 09, 2024
Verified
Which portion of a neuron originates action potentials (nerve impulses) , to send to other neurons, glands, or muscle cells?
A) Nucleolus
B) Dendrite
C) Neurilemma
D) Axon hillock
E) Nissl bodies (chromatophilic substance)
Axon Hillock
The conical region of a neuron's axon where the cell body transitions to the axon, and where action potentials are initiated.
Action Potentials
Brief reversals in the electrical charge of a neuron's membrane, which propagate along the neuron to transmit signals.
Neurilemma
The outermost layer of Schwann cells that surrounds the axon of a neuron, essential for the regeneration of peripheral nerve fibers.
- Describe the generation and conduction of action potentials in neurons.
- Identify and explain the components and functions of a neuron.
Verified Answer
MG
Mallory GrosvenorMay 16, 2024
Final Answer :
D
Explanation :
The axon hillock is the region of the neuron where action potentials are initiated. It is located at the base of the axon and integrates input from the dendrites before triggering the action potential.
Learning Objectives
- Describe the generation and conduction of action potentials in neurons.
- Identify and explain the components and functions of a neuron.