Question 1

Dendrites ____.​

Accepted Answer

A) contain the nucleus, ribosomes, and other structures found in most cells 
B) ​are branching fibers that get narrower near their ends 
C) ​are thin fibers of constant diameter 
D) are an insulating material that cover an axon 
A) contain the nucleus, ribosomes, and other structures found in most cells 
B) ​are branching fibers that get narrower near their ends 
C) ​are thin fibers of constant diameter 
D) are an insulating material that cover an axon

Question 2

​The blood-brain barrier is made up of closely packed glial cells.

Accepted Answer

A) True 
 B)False

Question 3

A drug that blocks the sodium gates of a neuron's membrane will ____.​

Accepted Answer

A) decrease the threshold 
B) ​block the action potential 
C) ​cause repeated action potentials 
D) eliminate the refractory period 
A) decrease the threshold 
B) ​block the action potential 
C) ​cause repeated action potentials 
D) eliminate the refractory period

Question 4

Protein channels allow ____ molecules to cross the cell membrane.​

Accepted Answer

A) large charged 
B) ​small charged 
C) ​large uncharged 
D) small uncharged 
A) large charged 
B) ​small charged 
C) ​large uncharged 
D) small uncharged

Question 5

What type of glia helps to synchronize the activity of axons?​

Accepted Answer

A) oligodendrocytes 
B) ​astrocytes 
C) ​radial glia 
D) Schwann cells 
A) oligodendrocytes 
B) ​astrocytes 
C) ​radial glia 
D) Schwann cells

Question 6

Which of the following describes the transmission of information in a local neuron?​

Accepted Answer

A) The signal decreases in strength as it travels. 
B) ​The signal increases in strength as it travels. 
C) ​The signal strength remains constant as it travels. 
D) Local neurons do not transmit any information. 
A) The signal decreases in strength as it travels. 
B) ​The signal increases in strength as it travels. 
C) ​The signal strength remains constant as it travels. 
D) Local neurons do not transmit any information.

Question 7

The neuron will produce an action potential only if the depolarization exceeds the ____.​

Accepted Answer

A) The neuron will produce an action potential only if the depolarization exceeds the ____. 
B) ​the resting potential 
C) ​hyperpolarization 
D) the refractory period 
A) The neuron will produce an action potential only if the depolarization exceeds the ____. 
B) ​the resting potential 
C) ​hyperpolarization 
D) the refractory period

Question 8

What is one major cause for the resting potential of a neuron's membrane?​

Accepted Answer

A) a difference in size between axons and dendrites 
B) ​a high permeability of the membrane to water molecules 
C) ​the refractory period of the membrane 
D) the sodium-potassium pump 
A) a difference in size between axons and dendrites 
B) ​a high permeability of the membrane to water molecules 
C) ​the refractory period of the membrane 
D) the sodium-potassium pump

Question 9

What occurs when depolarization is less than the cell's threshold?​

Accepted Answer

A) Sodium is prevented from crossing the membrane. 
B) ​Potassium is prevented from crossing the membrane. 
C) ​Sodium crosses the membrane only slightly more than usual. 
D) The cell will still produce an action potential. 
A) Sodium is prevented from crossing the membrane. 
B) ​Potassium is prevented from crossing the membrane. 
C) ​Sodium crosses the membrane only slightly more than usual. 
D) The cell will still produce an action potential.

Question 10

What occurs when a stimulus shifts the potential inside a neuron from the resting potential to a more negative potential?​

Accepted Answer

A) hyperpolarization 
B) ​depolarization 
C) ​an action potential 
D) a threshold 
A) hyperpolarization 
B) ​depolarization 
C) ​an action potential 
D) a threshold

Question 11

The speed of an action potential down an unmyelinated axon is best described as ____.​

Accepted Answer

A) the speed of electricity, regardless of the size of the axon 
B) ​less than 1 meter per second, regardless of the size of the axon 
C) ​faster in thin axons than in thick ones 
D) faster in thick axons than in thin ones 
A) the speed of electricity, regardless of the size of the axon 
B) ​less than 1 meter per second, regardless of the size of the axon 
C) ​faster in thin axons than in thick ones 
D) faster in thick axons than in thin ones

Question 12

Schwann cells build the myelin sheaths in the periphery of the body.​

Accepted Answer

A) True 
 B)False

Question 13

The all-or-none law states that ____.​

Accepted Answer

A) a neuron produces an action potential of maximal strength, or none at all 
B) ​all neurons fire or none at all 
C) ​all neurons in a pathway fire at the same time, or none do 
D) all ions move in the same direction, or none do 
A) a neuron produces an action potential of maximal strength, or none at all 
B) ​all neurons fire or none at all 
C) ​all neurons in a pathway fire at the same time, or none do 
D) all ions move in the same direction, or none do

Question 14

Nodes of Ranvier are ____.​

Accepted Answer

A) gaps in the myelin of axons 
B) ​also known as myelin sheath 
C) ​spiny outgrowths on dendrites 
D) responsible for cell metabolism 
A) gaps in the myelin of axons 
B) ​also known as myelin sheath 
C) ​spiny outgrowths on dendrites 
D) responsible for cell metabolism

Question 15

An afferent axon brings information into a structure.

Accepted Answer

A) True 
 B)False

Question 16

The action potential of a neuron depends mostly on what movement of ions?​

Accepted Answer

A) sodium ions entering the cell 
B) ​sodium ions leaving the cell 
C) ​potassium ions entering the cell 
D) potassium ions leaving the cell 
A) sodium ions entering the cell 
B) ​sodium ions leaving the cell 
C) ​potassium ions entering the cell 
D) potassium ions leaving the cell

Question 17

Which scientific work did Cajal apply to his study of infant brains?​

Accepted Answer

A) Charles Sherrington's study of reflexes 
B) ​Camillo Golgi's cell staining method 
C) ​Perves & Hadley's dye injection method 
D) Galileo's invention of the telescope 
A) Charles Sherrington's study of reflexes 
B) ​Camillo Golgi's cell staining method 
C) ​Perves & Hadley's dye injection method 
D) Galileo's invention of the telescope

Question 18

Glucose enters the brain via which type of transport?​

Accepted Answer

A) indirect transport 
B) ​direct transport 
C) ​passive transport 
D) active transport 
A) indirect transport 
B) ​direct transport 
C) ​passive transport 
D) active transport

Question 19

In what direction does a local neuron transmit information?​

Accepted Answer

A) through its dendrites to cell body to axon 
B) ​through its axon to cell body to dendrites 
C) ​only toward the cell body 
D) equally well in any direction 
A) through its dendrites to cell body to axon 
B) ​through its axon to cell body to dendrites 
C) ​only toward the cell body 
D) equally well in any direction

Question 20

As compared to dendrites,axons usually ____.​

Accepted Answer

A) form the information-receiving pole of the neuron 
B) ​are shorter in length 
C) ​are covered with myelin 
D) taper in diameter toward their periphery 
A) form the information-receiving pole of the neuron 
B) ​are shorter in length 
C) ​are covered with myelin 
D) taper in diameter toward their periphery

Dendrites ____.

The blood-brain barrier is made up of closely packed glial cells.

A drug that blocks the sodium gates of a neuron's membrane will ____.

Protein channels allow ____ molecules to cross the cell membrane.

What type of glia helps to synchronize the activity of axons?

Which of the following describes the transmission of information in a local neuron?

The neuron will produce an action potential only if the depolarization exceeds the ____.

What is one major cause for the resting potential of a neuron's membrane?

What occurs when depolarization is less than the cell's threshold?

What occurs when a stimulus shifts the potential inside a neuron from the resting potential to a more negative potential?

The speed of an action potential down an unmyelinated axon is best described as ____.

Schwann cells build the myelin sheaths in the periphery of the body.

The all-or-none law states that ____.

Nodes of Ranvier are ____.

An afferent axon brings information into a structure.

The action potential of a neuron depends mostly on what movement of ions?

Which scientific work did Cajal apply to his study of infant brains?

Glucose enters the brain via which type of transport?

In what direction does a local neuron transmit information?

As compared to dendrites,axons usually ____.

Synapses

Anatomy and Research Methods

Genetics, evolution, development, and Plasticity

Vision

Other Sensory Systems

Movement

Wakefulness and Sleep

Internal Regulation

Reproductive Behaviors

Emotional Behaviors

The Biology of Learning and Memory

Cognitive Functions

Psychological Disorders

Appendix A: Brief, basic Chemistry

Filters

Exam 1: Nerve Cells and Nerve Impulses

Dendrites ____.​

​The blood-brain barrier is made up of closely packed glial cells.

A drug that blocks the sodium gates of a neuron's membrane will ____.​

Protein channels allow ____ molecules to cross the cell membrane.​

What type of glia helps to synchronize the activity of axons?​

Which of the following describes the transmission of information in a local neuron?​

The neuron will produce an action potential only if the depolarization exceeds the ____.​

What is one major cause for the resting potential of a neuron's membrane?​

What occurs when depolarization is less than the cell's threshold?​

What occurs when a stimulus shifts the potential inside a neuron from the resting potential to a more negative potential?​

The speed of an action potential down an unmyelinated axon is best described as ____.​

Schwann cells build the myelin sheaths in the periphery of the body.​

The all-or-none law states that ____.​

Nodes of Ranvier are ____.​

An afferent axon brings information into a structure.

The action potential of a neuron depends mostly on what movement of ions?​

Which scientific work did Cajal apply to his study of infant brains?​

Glucose enters the brain via which type of transport?​

In what direction does a local neuron transmit information?​

As compared to dendrites,axons usually ____.​

Synapses

Anatomy and Research Methods

Genetics, evolution, development, and Plasticity

Vision

Other Sensory Systems

Movement

Wakefulness and Sleep

Internal Regulation

Reproductive Behaviors

Emotional Behaviors

The Biology of Learning and Memory

Cognitive Functions

Psychological Disorders

Appendix A: Brief, basic Chemistry

Filters

Dendrites ____.

The blood-brain barrier is made up of closely packed glial cells.

A drug that blocks the sodium gates of a neuron's membrane will ____.

Protein channels allow ____ molecules to cross the cell membrane.

What type of glia helps to synchronize the activity of axons?

Which of the following describes the transmission of information in a local neuron?

The neuron will produce an action potential only if the depolarization exceeds the ____.

What is one major cause for the resting potential of a neuron's membrane?

What occurs when depolarization is less than the cell's threshold?

What occurs when a stimulus shifts the potential inside a neuron from the resting potential to a more negative potential?

The speed of an action potential down an unmyelinated axon is best described as ____.

Schwann cells build the myelin sheaths in the periphery of the body.

The all-or-none law states that ____.

Nodes of Ranvier are ____.

The action potential of a neuron depends mostly on what movement of ions?

Which scientific work did Cajal apply to his study of infant brains?

Glucose enters the brain via which type of transport?

In what direction does a local neuron transmit information?

As compared to dendrites,axons usually ____.