APHY 201 Ch 8 Neurons Ivy Tech Exam Questions with Correct Answers
Question 1:
Functional Classes of Neurons
Answer:
regardless of the stimulus. aka action potential
Question 2:
Grouped by direction in which nerve impulse travels relative to CNS
Answer:
Sensory Neurons,
Question 3:
Dendrites, Cell Body, and Axon.
Answer:
General Regions of Neurons
Question 4:
Receptive region of the neuron along with the cell body. Receive stimuli from the (short
distance signals).
Answer:
Dendrites
environment or from other neurons. Highly branched. Typically covered with ligand-gated ion
channels. Convey incoming messages toward cell body as graded potentials
Question 5:
Contains the nucleus and other organelles. Biosynthetic center of neuron that
Answer:
Cell Body (Perikaryon)
synthesizes proteins, membranes, and other chemicals. Part of receptive region and can convey
graded potentials to axon hillock due to presence of ligand-gated channels.
Question 6:
Carries information away from the cell body and toward other cells. Can convey action
potentials due to the presence of voltage-gated channels.
Answer:
Axon
, Question 7:
Origin of the axon from the cell body.
Answer:
Axon Hillock
Question 8:
This segment of the axon lies distally adjacent to the axon hillock. It is the trigger zone
Answer:
Initial Segment
where an action potential is initiated due to the presence of voltage-gated channels.
Question 9:
The axon ends at this terminal, which is also known as synaptic terminals, where the are
present.
Answer:
Axon Terminals
neuron communicates with other cells. Synaptic vesicles containing neurotransmitter
Question 10:
A membranous wrapping that coats axons and increases the speed of nerve impulse Schwann
cells in PNS.
Answer:
Myelin
transmission due to saltatory conduction. Produced by oligodendrocytes in CNS and
Question 11:
The small unmyelinated gaps along the axon that contain voltage-gated channels.
Answer:
Nodes of Ranvier
Question 12:
Energy is required to separate opposite charges across a membrane, e.g. Na+/K+
Answer:
Opposite charges attract each other.
Question 1:
Functional Classes of Neurons
Answer:
regardless of the stimulus. aka action potential
Question 2:
Grouped by direction in which nerve impulse travels relative to CNS
Answer:
Sensory Neurons,
Question 3:
Dendrites, Cell Body, and Axon.
Answer:
General Regions of Neurons
Question 4:
Receptive region of the neuron along with the cell body. Receive stimuli from the (short
distance signals).
Answer:
Dendrites
environment or from other neurons. Highly branched. Typically covered with ligand-gated ion
channels. Convey incoming messages toward cell body as graded potentials
Question 5:
Contains the nucleus and other organelles. Biosynthetic center of neuron that
Answer:
Cell Body (Perikaryon)
synthesizes proteins, membranes, and other chemicals. Part of receptive region and can convey
graded potentials to axon hillock due to presence of ligand-gated channels.
Question 6:
Carries information away from the cell body and toward other cells. Can convey action
potentials due to the presence of voltage-gated channels.
Answer:
Axon
, Question 7:
Origin of the axon from the cell body.
Answer:
Axon Hillock
Question 8:
This segment of the axon lies distally adjacent to the axon hillock. It is the trigger zone
Answer:
Initial Segment
where an action potential is initiated due to the presence of voltage-gated channels.
Question 9:
The axon ends at this terminal, which is also known as synaptic terminals, where the are
present.
Answer:
Axon Terminals
neuron communicates with other cells. Synaptic vesicles containing neurotransmitter
Question 10:
A membranous wrapping that coats axons and increases the speed of nerve impulse Schwann
cells in PNS.
Answer:
Myelin
transmission due to saltatory conduction. Produced by oligodendrocytes in CNS and
Question 11:
The small unmyelinated gaps along the axon that contain voltage-gated channels.
Answer:
Nodes of Ranvier
Question 12:
Energy is required to separate opposite charges across a membrane, e.g. Na+/K+
Answer:
Opposite charges attract each other.
