Which of the following occurs during human inhalation?
a. The diaphragm contracts and the external intercostal muscles relax.
b. The diaphragm relaxes and the external intercostal muscles contract.
c. The diaphragm contracts and the external intercostal muscles contract.
d. The diaphragm relaxes and the external intercostal muscles relax.
e. The diaphragm expands and increases oxygen uptake.
C
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For the most part, all Enterobacteriaceae are positive for which biochemical reactions?
a. Glucose, oxidase, and catalase b. Glucose, indole, and oxidase c. Glucose, reduce nitrates to nitrites, and oxidase d. Glucose, catalase, and reduce nitrates to nitrites
R is the dominant allele for round pea texture; r is the recessive allele for wrinkled pea texture. If you cross plants
having round peas with plants having wrinkled peas, ____.
a. all progeny will be homozygous for pea texture b. you are conducting a dihybrid cross c. you are conducting a reciprocal cross d. all progeny will have wrinkled peas e. you will be able to determine if the plant with round peas is homozygous or heterozygous for this trait
The binding of a neurotransmitter to ligand-gated K+ channels will cause ____ in the postsynaptic membrane
a. depolarization only b. hyperpolarization c. repolarization only d. apolarization e. depolarization and repolarization
Which immunoglobulin is the major form of antibody in blood plasma?
A. IgD B. IgE C. IgM D. IgG E. IgA