The major histocompatibility complex (MHC)
A) kills the target cell by disrupting its metabolism.
B) produces antibodies in lymph glands.
C) is a group of genes that codes for CD4 markers.
D) is a membrane protein that can display foreign antigens.
E) is the antigen found on bacteria that stimulates an immune response.
D) is a membrane protein that can display foreign antigens.
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Neuroglia in the nervous system function to
A) transfer nerve impulses from the brain to the spinal cord. B) support the neurons. C) process information in the nervous system. D) carry nerve impulses. E) All of the answers are correct.
In order for a lymphocyte to respond to an antigen, the antigen must
A) be phagocytized by the lymphocyte. B) enter the cytoplasm of the lymphocyte. C) bind to the DNA of the lymphocyte. D) bind to specific receptors on the lymphocyte surface. E) depolarize the lymphocyte.
Seven-year-old Rebecca has a cold. Which of the following occurs first?
A. The release of macrophages to attack the cold virus B. The release of natural killer cells to induce inflammation C. The release of neutrophils to ingest any pathogens D. The release of white blood cells to cause viral membranes to rupture
Within the kidney, several nephrons merge and empty their forming urine into a common
A. distal convoluted tubule. B. collecting duct. C. renal pelvis. D. nephron loop. E. minor calyx.