The Three Main Anatomical and Functional Divisions of the Brain

question 77

Multiple Choice

The three main anatomical and functional divisions of the brain are the

• A) forebrain, midbrain, hindbrain.
• B) frontal, parietal, occipital.
• C) cerebellum, medulla oblongata, pons.
• D) ventricles, meninges, nerve tracts.
• E) hypothalamus, thalamus, pituitary.

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Definitions:

Steroids

A large class of organic compounds with a characteristic molecular structure containing four rings of carbon atoms; they include many hormones, alkaloids, and vitamins.

Intracellular Receptors

Proteins located inside the cell that bind to certain substances and initiate a specific cellular response.

First Messenger

A signaling molecule that binds to a receptor on the cell surface, initiating a signal transduction process that leads to the formation of an intracellular second messenger.

Ion Channel

An ion channel is a protein structure embedded in cell membranes that allows ions to pass through the membrane selectively.