ankitmarilyn

What causes lactose intolerance in humans?

The enzyme lactase, which breaks down the sugar in milk, is produced by certain cells of the small intestine. Which of the following observations would provide the best evidence that the gene coding for lactase is being expressed in a cell?

A. The gene for lactase is present in the nucleus of the cell.

B. The cell is located in the small intestine.

C. The enzyme lactase is found in the cell.

D. Milk sugar is found in the cell.

E. Milk sugar is found in the small intestine.

Which accurately describes the median eminence of thehypothalamus?

A) it is the site of synthesis of adrenocorticotropic hormone(ACTH)

B) it is a site where neurohormones are release into bloodvessels

C) it is the site where vasopressin is released into bloodvessels

D) it is the stalk connecting the hypothalamus to the posteriorpituitary

E) It is the main site where thyroid stimulating hormone firstenters the blood stream

which of the following statements about hormones is correct?

A) Anterior pituitary hormones are synthesized in thehypothalamus

B) All hormones secreted by the anterior and posterior pituitaryglands are peptides

C) IGF-1 stimulates growth by increasing growth hormonesecretion through positive feedback

D) All of the hypophysiotropic hormones are peptides

E) Only steriod hormones can regulate the secretion of steriodhormones