01
Choose one
1 point
Which pairing correctly identifies the cells that make myelin in the central and peripheral nervous systems?
Free Practice Quiz Question List
1 Neurons and Neural Signaling Online Quiz Questions
Use this free practice quiz with 20 questions to review 1 Neurons and Neural Signaling, test your knowledge, and prepare for your next test or exam.
20 questions
02
True or false
1 point
A stronger stimulus generally makes an individual action potential larger.
- A
True
- B
False
03
Fill in the blank
1 point
The resident immune cells that monitor neural tissue and help clear debris are .
04
Choose one
1 point
A neuron receives several inputs, and their combined effect reaches threshold. Which region is a common site for the resulting action potential to begin?
- A
Dendrites
- B
Axon terminals
- C
Axon initial segment
- D
Cell body nucleus
05
Choose all
1 point
Select all statements that correctly describe how graded potentials can contribute to an action potential.
- A
Inputs arriving close together in time may add together.
- B
Each graded potential is all-or-none and cannot combine with another input.
- C
Inputs arriving at different locations may add together.
- D
A graded potential always triggers an action potential, regardless of its size.
06
True or false
1 point
At a chemical synapse, calcium entry into the axon terminal after an arriving action potential triggers neurotransmitter release.
- A
True
- B
False
07
Fill in the blank
1 point
In a myelinated axon, the electrical signal is regenerated at the , enabling rapid saltatory conduction.
08
Choose one
1 point
Which sequence best describes the major ion movements during an action potential?
- A
Potassium moves into the cell to depolarize it, then sodium moves out to repolarize it.
- B
Sodium moves into the cell to depolarize it, then potassium moves out to repolarize it.
- C
Calcium moves out of the cell to depolarize it, then sodium moves in to repolarize it.
- D
Sodium and potassium both move into the cell throughout the action potential.
09
Written response
1 point
What is the name of the region near the beginning of an axon that is a common site for action-potential initiation?
10
Choose all
1 point
Select all functions associated with astrocytes.
- A
They help regulate ions and neurotransmitters around synapses.
- B
They are the resident immune cells that clear neural debris.
- C
They support neurons metabolically and interact with blood vessels.
- D
They make myelin in the peripheral nervous system.
11
Open ended
1 point
Explain how inputs from multiple synapses can lead a neuron to generate an action potential. Include how the effect of an individual synapse is determined and where the combined influence must reach threshold.
12
Written response
1 point
What is the term, also called the cell body, for the neuron region that contains the nucleus and supports the cell's metabolism?
13
Choose one
1 point
Two synapses use the same neurotransmitter but have different effects on their receiving cells. Which explanation is consistent with how synapses work?
- A
The neurotransmitter's identity alone determines whether the receiving cell fires.
- B
Every chemical synapse makes the receiving cell more likely to fire.
- C
Every chemical synapse makes the receiving cell less likely to fire.
- D
The receptors and cellular context help determine whether the receiving cell becomes more or less likely to fire.
14
Choose one
1 point
Which statement best explains the usual voltage difference across a resting neuronal membrane?
- A
The inside is usually positive because the resting membrane is most permeable to sodium.
- B
The inside and outside are at the same voltage because ions are evenly distributed.
- C
The inside is usually negative relative to the outside, and the resting membrane is especially permeable to potassium.
- D
The inside is usually negative because the membrane is impermeable to all ions.
15
Choose one
1 point
A neuron receives signals through several branches, and those inputs are combined before the neuron sends an output. Which region is primarily responsible for integrating those incoming signals?
- A
The axon terminal
- B
The cell body (soma)
- C
The axon
- D
The dendrite
16
Choose one
1 point
A glial cell helps regulate ions and neurotransmitters around synapses, provides metabolic support to neurons, and interacts with blood vessels. Which type of glial cell best fits this description?
- A
Astrocyte
- B
Microglial cell
- C
Ependymal cell
- D
Schwann cell
17
Choose one
1 point
A neuron at rest is electrically negative inside relative to the outside. Which explanation best accounts for this resting membrane potential?
- A
The membrane is equally permeable to all ions, so no voltage difference can form.
- B
Sodium ions are continuously released from vesicles into the cell.
- C
Ion gradients and especially high resting permeability to potassium help make the inside relatively negative.
- D
Calcium channels remain open and keep the inside positively charged.
18
True or false
1 point
Graded potentials can combine, and their combined effect can bring the axon initial segment to threshold and trigger an action potential.
- A
True
- B
False
19
Written response
1 point
What is the name of the region near the beginning of an axon that is a common site where an action potential starts?
20
Written response
1 point
What is the name of the rapid conduction process in myelinated axons in which the electrical signal is regenerated at nodes of Ranvier?