A 73-Year-Old Man Comes to the Office for Follow-Up

question 23

Multiple Choice

A 73-year-old man comes to the office for follow-up.  He was diagnosed with chronic lymphocytic leukemia (CLL) 3 years ago when routine laboratory testing revealed a markedly elevated leukocyte count.  He feels well.  On examination, he has stable lymphadenopathy.  He has been reading about management options should his CLL progress and inquires about an experimental drug that selectively binds malignant lymphocytes.  The drug has been shown to significantly prolong survival in patients with stage 3 and 4 CLL, without curing the malignancy.  If this new drug were widely used, what changes would be expected in the number of incident and prevalent cases of CLL?

• A)The number of incident cases will decrease, the number of prevalent cases will decrease
• B)The number of incident cases will increase, the number of prevalent cases will not change
• C)The number of incident cases will decrease, the number of prevalent cases will increase
• D)The number of incident cases will not change, the number of prevalent cases will increase
• E)The number of incident cases will not change, the number of prevalent cases will not change

Recognize the significance of genetic research findings for understanding human diversity and commonalities.

Distinguish between monozygotic and dizygotic twins in terms of genetic similarity and research implications.

Comprehend the genetic foundations of temperament and personality.

Understand the genetic basis of lactose tolerance and its behavioral significance.

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Definitions:

Absorptive Cells

Cells lining the mucosa of the small intestine and involved in the absorption of nutrients from digested food into the bloodstream.

Intestinal Epithelium

The intestinal epithelium is the layer of cells that line the interior surface of the intestines, playing crucial roles in nutrient absorption, secretion, and barrier protection.

Digestive Tract

A continuous tube through which food enters the body and is broken down into nutrients, which are absorbed, with the waste expelled.

Peristalsis

A series of wave-like muscle contractions that moves food to different processing stations in the digestive tract.