Blood type is determined by
A. antigens in the plasma.
B. antibodies on red blood cells.
C. antibodies in the plasma.
D. antigens on red blood cells.
Answer: D
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What type of tissue is replaced in the embryo during endochondral ossification?
A) connective tissue membranes B) fibrocartilage C) mesenchymal tissue D) hyaline cartilage E) Wharton's jelly
Which applies to the classical complement pathway, but NOT to the alternative complement pathway?
A. Complement activation leads to the development of a multiunit protein called the membrane attack complex (MAC). B. There is a cascade of proteins activated, which results in the killing of microbes. C. Antibodies activate the first complement protein (C1). D. Complement proteins serve as opsonins that facilitate phagocyte binding to microbes. E. Activation of C3 results in the formation of C3b.
The diabetic patient faced amputation of his toes due to long-delayed wound healing in his foot. Which characteristic of his diabetic condition caused his medical crisis?
A) Insulin reactions B) Increase in his blood flow C) High blood sugar D) Decrease in his white blood cell activity
The tissue phagocytes, macrophages are derived from which agranulocyte?
a. neutrophils. b. eosinophils. c. basophils. d. lymphocytes. e. monocytes.