Please answer all parts or questions 6, 7, 8, and 9! Thank you so much!! 6. A) D

Question

Please answer all parts or questions 6, 7, 8, and 9!
Thank you so much!!

6. A) Differentiate between hyperplasia and hypertrophy by describing what is happening at the cellular level in each. B) Give an example for each of these that is part of a normal cellular adaptive response and describe how it serves as a normal adaptive response. 7. A) What is a fatty change? B) Describe the process behind one cause of fatty change. C) Name two organs most affected by fatty change and explain why these organs are affected more by fatty change than other organs. 8. Differentiate between benign and malignant neoplasms by comparing and contrasting at least three different characteristics. 9. A) Differentiate (at the cellular level) between metaplasia and dysplasia. Be sure to define and give an example of each as part of your answer. B) Define Reserve Capacity.

Explanation / Answer

6.(a)Hyperplasia:-An increase in amount of tissue resulting from cell proliferation.It is a common preneoplastic response to the stimulus.In this cells resemble the normal cells but are increases in number and sometimes can be enlarged.

Hypertrophy:-Increase of volume of a given tissue or organ due to only enlargement of cells.

(b)Hypertrophy involves increase in intracellular protein rather than cytosol.I t could be caused by mechanical or tropic signals.For eg.physiologic hypertrophy is in skeletal muscles with sustained weight bearing exercise.

Hyperplasia:-It is the result of increased cell mitosis or division. The two types of physiologic hyperplasia are compensatory and hormonal. Compensatory hyperplasia permits tissue and organ regeneration. It is common in epithelial cells of the epidermis and intestine,liver hepatocytes, bone marrow cells, and fibroblasts. Hormonal hyperplasia occurs mainly in organs that depend on estrogen. For example, the estrogen-dependent uterine cells undergo hyperplasia and hypertrophy following pregnancy. Pathologic hyperplasia is an abnormal increase in cell division. A common pathologic hyperplasia in women occurs in the endometrium and is called endometriosis.

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