The increasing concentration of salt and urea in the renal medulla that continues to draw water out of the descending limb is called
A. countercurrent mechanism.
B. diuresis.
C. secretion.
D. antidiuresis.
Answer: A
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The hypothalamus influences endocrine activity by
A. overseeing the autonomic nervous system. B. producing hormones that are stored in the posterior pituitary gland. C. secreting regulatory hormones that influence the anterior pituitary gland. D. stimulating hormone secretion by the adrenal medulla. E. All of the choices are correct.
Elastic cartilage tissue is found in the walls of the large arteries that leave the heart
Indicate whether the statement is true or false
The ________ muscles adjust the shape and thickness of the lens
Fill in the blank(s) with correct word
Which cells are required to process and present antigens from foreign material as the initial step in the immune response?
A) T-helper cells B) macrophages C) eosinophils D) monocytes