To Increase the Effectiveness of Exchange Surfaces Lining the Lungs

question 52

Multiple Choice

To increase the effectiveness of exchange surfaces lining the lungs and the intestines, evolutionary pressures have

• A) increased the exchange surface area with folds and branches.
• B) increased the thickness of the membranes in these linings.
• C) increased the number of cell layers in these linings.
• D) decreased the metabolic rate of the cells in these linings.
• E) increased the volume of the cells in these linings.

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Definitions:

Neurons

Specialized cells in the nervous system that transmit information through electrical and chemical signals.

Dendrites

Branch-like extensions of neurons that receive signals from other neurons and are crucial for neural communication.

Axon

An extended, slim protrusion from a neuron, or nerve cell, generally responsible for conducting electrical stimuli away from the main body of the cell.

Mitochondrion

An organelle found in large numbers in most cells, in which the biochemical processes of respiration and energy production occur.