An 85-year-old female in a long-term care facility is prescribed verapamil for blood pressure management twice daily. The medication is classified as a calcium channel blocker. As the RN, you are familiar with the action of calcium channel blockers. By inhibiting the passage of calcium through ion channels, the drug targets which of the following processes?
A. diffusion
B. active transport
C. passive transport
D. osmosis
Ans: B. active transport
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The cancer-causing forms of the Ras protein are involved in which of the following processes?
A) relaying a signal from a growth factor receptor B) DNA replication C) DNA repair D) cell-cell adhesion E) cell division
In mammals, males are ______ for genes on their sex chromosomes, and females can be ______ or heterozygous for genes on their sex chromosomes. rev
A. heterozygous, homozygous B. hemizygous, homozygous C. homozygous, hemizygous D. heterozygous, hemizygous
Archaeopteris belongs to the now-extinct lineage of seedless vascular plants called ____, and is proposed to be the
possible ancestor of gymnosperms.
a. Charophyta b. Monilophyta c. Lycophyta d. proangiosperms e. progymnosperms
Which of the following features would NOT be found in bryophytes?
A. flagellated sperm B. megaphylls C. a gametophyte dependent on the sporophyte D. alternation of generations