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Chapter 1: Problem 6

Identify three different ways that growth can occur in the hum an body.

Short Answer

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Answer: Growth in the human body can occur through cell division (mitosis), cellular enlargement (hypertrophy), and additive secretion. Mitosis is the process of a single cell dividing into two identical daughter cells, as seen in skin growth and healing. Cellular enlargement, or hypertrophy, involves an increase in the size or volume of a cell, such as muscle development through exercise. Additive secretion is the deposition of new materials on existing structures, like in bone growth during childhood and adolescence.

Step by step solution

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1. Cell Division (Mitosis)

One way that growth occurs in the human body is through cell division, specifically mitosis. Mitosis is when a single cell divides into two identical daughter cells, which then allows the body to grow by increasing the number of cells. It is essential for the growth and repair of tissues and organs. A common example of mitosis is the growth and healing of the skin.
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2. Cellular Enlargement (Hypertrophy)

Another way that growth can occur in the human body is through cellular enlargement, also known as hypertrophy. Hypertrophy is the increase in size or volume of a cell without changing the number of cells. This type of growth is especially important in muscle development, where muscle fibers become larger in response to exercise or other stimuli, allowing the person to develop more strength and muscle mass.
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3. Additive Secretion (Bone Growth)

The third way that growth can occur in the human body is through additive secretion. This process involves the deposition of new materials on the surface or interior of existing structures, contributing to their growth. A prominent example of additive secretion in the human body is bone growth. During childhood and adolescence, the growth plates in the long bones of the body produce new bone tissue, which is added to the existing bone structure, allowing the bones to grow and become more substantial.

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