Natural Selection Tends to Correlate the Structures of a Nervous

question 49

Multiple Choice

Natural selection tends to correlate the structures of a nervous system with an animal's interaction with the environment. A good example is sessile or slow-moving molluscs such as clams, which

• A)have little or no cephalization and simple sense organs.
• B)use chemical synapses to process complex information.
• C)have a well-developed brain that functions as a master control center.
• D)use their circulatory system as a mechanism for distributing nerve impulses.

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Definitions:

Cardiac Output

The volume of blood the heart pumps through the circulatory system in one minute, an important measure of heart function and efficiency.

Stroke Volume

The amount of blood pumped by the left ventricle of the heart in one contraction, indicating the heart's efficiency in pumping.

Myocardial Contractility

The ability of the heart muscle (myocardium) to contract or shorten, which is a key factor in the heart's function to pump blood.

Right-Sided Heart Failure

Abnormal condition that results from impaired functioning of the right ventricle; characterized by venous congestion in the systemic circulation.