Omental appendices are located on which of the following structures?
(a) stomach
(b) duodenum
(c) ileum
(d) ascending colon
(e) liver
Ans: (d) ascending colon
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The meningeal layer in contact with the cranium is the
A. dura mater. B. arachnoid. C. pia mater. D. None of the above
The integumentary system is protected by the action of cells that arise from bone marrow and migrate to the epidermis. Which of the following cells serve this function?
A) cells found in the stratum spinosum B) macrophages called epidermal dendritic cells C) keratinocytes, because they are so versatile D) tactile cells
The clumping of foreign cells that occurs when antibodies cross-link their antigens is known as
A. neutralization. B. precipitation. C. agglutination. D. fixation. E. opsonization.
Which of the following is the last step in the process of fertilization?
A. A sperm fuses with the egg's plasma membrane. B. The capacitated sperm release their acrosomal enzymes to penetrate through the cells surrounding the egg. C. The sperm nucleus enters the egg, and the egg immediately prevents any further sperm from gaining access by forming a fertilization membrane that a sperm cannot penetrate. D. The nuclei of the sperm and egg rupture within the fertilized egg and the chromosomes mix to form a single nucleus.