When a muscle contracts, the opposing muscle with which it is paired will ____
a. pull
b. push
c. contract
d. relax
e. shorten
ANSWER: d
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In Drosophila virilis, somatic cell nuclei contain 12 chromosomes while sperm nuclei contain only 6 chromosomes. What does n equal for this species?
A) 3 B) 6 C) 12 D) 24 E) 6 or 12, depending on cell type
Antigen bearing particles in the blood travel to the ____, while those in solid tissues travel to the ____
a. spleen; bone marrow b. thymus; bone marrow c. spleen; lymph nodes d. lymph nodes; spleen e. bone marrow; thymus
The surface area of all the alveoli in the lungs is
equivalent to the surface of a regulation __________ court. a. tennis b. basketball c. racquetball d. jai lai e. all of these combined
Which antigens are most important in matching for tissue transplants?
A) HLA A and B B) blood group antigens A or B C) HLA DR1 and DQ1 D) all of the above