Which of the Following Is a Normal Age-Related Change in the Nervous

question 22

Multiple Choice

Which of the following is a normal age-related change in the nervous system?

• A)Ventricles decrease in size
• B)Weight and size of the brain decreases
• C)Nerve impulses become slower
• D)all of the above

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Definitions:

Placoid Scales

The toothlike scales found in sharks and other cartilaginous fishes.

Cartilaginous Fishes

A class of fishes that have skeletons made entirely out of cartilage, rather than bone.

Jawless Fishes

A group of fish that lack a true jaw, represented by modern lampreys and hagfishes, belonging to the superclass Agnatha.

Myxini

A class of jawless marine animals known as hagfishes, characterized by their slimy skin and primitive features.