The Training Effect, in Which Individuals Experience Improvements in Physical

question 60

Multiple Choice

The training effect, in which individuals experience improvements in physical fitness as they continue a regular exercise regimen, is a product of

• A) increased number of mitochondria in muscle cells.
• B) increased number of capillaries in muscles.
• C) increased efficiency of the heart.
• D) All of the choices are correct.

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Definitions:

DNA

Deoxyribonucleic acid, a molecule that carries the genetic instructions used in the growth, development, functioning, and reproduction of all living organisms.

Mitosis

A type of cell division in eukaryotic cells that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus.

Centrioles

Cylinder-shaped structures found in most eukaryotic cells that play a significant role in cell division.

Spindle Fibers

Microtubule structures that form during cell division, crucial for separating chromosomes into daughter cells.