Antigens are
A. something made by a white blood cell to destroy a pathogen.
B. something that an antibody or T-lymphocyte binds to.
C. disorders involving overactive immune systems.
D. membrane receptors on B-lymphocytes.
B
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Answer the following statements true (T) or false (F)
1. Two neuron reflexes contain an interneuron and a motor neuron. 2. A ganglion is a group of nerve cell bodies located in the peripheral nervous system. 3. The difference between a two- and three-neuron reflex is the presence of an interneuron. 4. All interneurons are found in the central nervous system. 5. Multiple sclerosis is a disorder caused by injury or death to the oligodendrocytes.
The number of cells produced by meiosis is ________ the number of cells produced by mitosis.
one-fourth half equal to twice four times
The process of blood cell formation is ________.
A. hematopoiesis B. leukocytosis C. polycythemia D. hemogenesis
Which of these is hydrophobic?
A. Glucose B. Water C. K+ D. Cl- E. Lipid