Quiz #1 PSYC750
Quiz: Nervous System
Question 1
When depolarization of the cell membrane reaches threshold, which of the following occurs?
☐ Chloride ion channels open.
☐ Potassium ion channels open.
☑ Sodium ion channels open.
☐ Electrical potential becomes more negative.
Question 2
Cells that convey environmental information carry out the functions underlying thoughts, emotion, and
movements and transmit commands out to the body’s organs and muscles are called ______.
☑ neurons
☐ dendrites
☐ phagocytes
☐ glia
Question 3
______ have water soluble heads and water insoluble tails.
☑ Lipids
☐ Proteins
☐ Gases
1/9
, Quiz #1 PSYC750
Question 4
The cells that produce myelin in the parts of the nervous system outside of the brain and spinal cord are
called ______.
☐ Ranvier cells
☐ astrocytes
☐ oligodendrocytes
☑ Schwann cells
Question 5
The disorder multiple sclerosis results in the destruction of myelin. People with this disorder experience
motor and sensory disturbances because ______.
☐ nerve cells die off
☐ Axons are too thin
☑ Neurons lose the ability to send signals
☐ Nodes of Ranvier become enlarged
Question 6
______ are concentrated primarily outside of the neuron in the extracellular fluid, which contributes to
the negative resting membrane potential of neurons.
☐ Chloride ions
☑ Sodium ions
☐ Atoms
☐ Dendrites
2/9
Quiz: Nervous System
Question 1
When depolarization of the cell membrane reaches threshold, which of the following occurs?
☐ Chloride ion channels open.
☐ Potassium ion channels open.
☑ Sodium ion channels open.
☐ Electrical potential becomes more negative.
Question 2
Cells that convey environmental information carry out the functions underlying thoughts, emotion, and
movements and transmit commands out to the body’s organs and muscles are called ______.
☑ neurons
☐ dendrites
☐ phagocytes
☐ glia
Question 3
______ have water soluble heads and water insoluble tails.
☑ Lipids
☐ Proteins
☐ Gases
1/9
, Quiz #1 PSYC750
Question 4
The cells that produce myelin in the parts of the nervous system outside of the brain and spinal cord are
called ______.
☐ Ranvier cells
☐ astrocytes
☐ oligodendrocytes
☑ Schwann cells
Question 5
The disorder multiple sclerosis results in the destruction of myelin. People with this disorder experience
motor and sensory disturbances because ______.
☐ nerve cells die off
☐ Axons are too thin
☑ Neurons lose the ability to send signals
☐ Nodes of Ranvier become enlarged
Question 6
______ are concentrated primarily outside of the neuron in the extracellular fluid, which contributes to
the negative resting membrane potential of neurons.
☐ Chloride ions
☑ Sodium ions
☐ Atoms
☐ Dendrites
2/9
