Which of the following formed elements found in the blood are derived from reticulocytes?
a) Platelets
b) Erythrocytes
c) T lymphocytes
d) Monocytes
e) Basophils
b
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Natural killer (NK) cells ________
A) can kill cancer cells before the immune system is activated B) are also called cytotoxic T cells C) are cells of the adaptive immune system D) are a type of phagocyte
What are Peyer patches, and where are they located?
A. Mucous glands of the duodenal submucosa B. Fatty, clublike appendages on the serosa of the colon C. Lymphatic follicles of the ileum D. Peptic ulcers that may occur in the stomach or duodenum E. Lymphatic tissues of the oropharynx
Parturition occurs approximately ________ days after a woman's last menstrual cycle
A) 180 days B) 240 days C) 280 days D) 315 days E) 330 days
A mutation involving a single nucleotide is a _____ mutation
A. deletion B. duplication C. nondisjunction D. point E. aneuploidy