Which mature cells do not have a nucleus?
A. columnar cells of small intestines
B. columnar cells of upper respiratory tract
C. spermatozoa
D. macrophage (large, mobile white blood cell)
E. red blood cells
E
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Water is freely permeable through all cell membranes
Indicate whether the statement is true or false
________ hormones are so named because they stimulate other endocrine glands.
Fill in the blank(s) with the appropriate word(s).
The innermost connective tissue layer protecting the kidney and assisting in staving off infection is known as the ________
A) renal medulla B) perirenal fat capsule C) hilum D) renal fascia E) fibrous capsule
President John F. Kennedy had this disease whose symptoms include: inability to maintain glucose levels between meals, plasma Na+ levels drop, blood pH decreases, K+ levels increase, weight loss, and muscular weakness. These are symptoms of
a. hyperadrenalism, or Cushing's syndrome. b. hypoadrenalism, or Addison's disease. c. hypothyroidism; myxedema. d. diabetes mellitus, type I. e. hyperthyroidism, or Grave's disease