Why are functions of T-lymphocytes referred to as "cell-mediated" immunity?
A. Because T-lymphocytes are cells and not just plasma proteins
B. Because T-lymphocytes work against antigens associated with cells
C. Because T-lymphocytes work only against single-celled infectious agents
D. Because T-lymphocytes must activate other classes of cells in order to have any effect
B
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Answer the following statements true (T) or false (F)
1. The skin composes about 6% of the body weight. 2. The glue-like basement membrane connects the connective tissue membrane to the underlying structures. 3. The parietal and visceral pleurae are actually two parts of a single, continuous membrane. 4. A possible serious complication of an infected appendix is pleurisy. 5. Keratin is a tough, waterproof protein that fills cells of the stratum corneum.
All receptors for ________ are confined to the head and are innervated by cranial nerves.
A. the somesthetic senses B. exteroception C. proprioception D. chemoreception E. the special senses
The genotype WW is best described as ________.
A. homozygous recessive B. heterozygous dominant C. heterozygous recessive D. homozygous dominant E. homorecessive
Which skull canal contains branches of the trigeminal nerve?
A. Carotid canal B. Foramen ovale C. Jugular foramen D. Nasolacrimal canal E. External auditory canal