Chapter 23

Front 1

Animal nervous systems have several principal features. These include all of the following except:

Back 1

They coordinate long-term growth and development in an organism.

Front 2

Which of the following statements about plants and nervous systems is correct?

Back 2

Plants cannot feel pain because they do not have nervous systems.

Front 3

What is the difference between a nerve and a neuron?

Back 3

A nerve is a bundle of neurons, whereas a neuron is a single cell.

Front 4

In a neuron, the cell body:

Back 4

Contains the nucleus, mitochondria, and other cell organelles.

Front 5

Dendrites:

Back 5

Receive information from other neurons or from the external envirornment.

Front 6

In individuals with multiples sclerosis, myelin is gradually lost. What symptoms would you expect these individuals to exhibit?

Back 6

Their neurons gradually lose their ability to conduct electrical impulses.

Front 7

Which of the choices below properly describes the difference between the gray and white matter of the nervous system?

Back 7

The white matter is composed of myelinated fibers, and the gray matter is composed of non-myelinated fibers.

Front 8

The synapse consist of:

Back 8

The interface between a neuron and another neuron or muscle cell or gland.

Front 9

Neurotransmitters in a synaptic cleft have all of the following possible fates except:

Back 9

inactivation by acetylcholine in the synaptic cleft.

Front 10

An action potential in the optic nerve triggered by light striking the eye is the same as:

Back 10

Answers a), b), and c) are correct.

Front 11

When you put a piece of chocolate on your tongue, your brain registers a sensation of sweetness. What aspect of a molecule is responsible for its having a particular taste?

Back 11

the molecule's shape

Front 12

Because cone cells are less sensitive to light than are rod cells:

Back 12

they are better suited for daylight vision

Front 13

sensory receptors in your skin include

Back 13

mechanoreceptors, the thermoreceptors, and pain receptors

Front 14

the connective tissue that connects a muscle to a bone is also known as

Back 14

a tendon

Front 15

Which of the following is not one of the many functions of an endoskeleton?

-storage of important vital minerals
-production of blood and immune cells
-protection for the body's internal structures
-supporting the animal against gravity
-all of the above are important functions of an endoskeleton

Back 15

all of the above are important functions of an endoskeleton

Front 16

the brain is divided into which three main regions?

Back 16

hindbrain, midbrain, and forebrain

Front 17

the blood-brain barrier:

-is formed from muscle tissue
-is a semi-permeable barricade that allows essential minerals and gases to pass through
-prevents harmful molecules such as metabolic wastes from passing into the brain
-restricts the passage of molecules to neurons but not to glial cells

Back 17

both b and c

Front 18

A boy is born with a specific brain defect in which the two hemispheres of his cerebrum are no longer able to "talk" to each other (they are no longer connected). This boy is born with out a:

Back 18

corpus callosum

Front 19

Caffeine blocks what type of receptors in the human nervous system?

Back 19

adenosine

Front 20

Which of the following is not an effect of alcohol on the nervous system?

Back 20

alcohol blocks the reuptake of the acetylcholine, creating an energized feeling