During a check-up, a 22-year-old woman tells the nurse that she uses an over-the-counter nasal spray because of her allergies. she also states that it does not work as well as it used to when she started using it. the best response by the nurse would be

Maintaining a healthy weight allows the respiratory system to work more effectively because a. oxygen is being delivered more adequately. b. the heart does not have to pump as forcefully. c. the capillaries are constricted. d. the lung capacity allows for small amounts of air.

Which of the following processes within viral replication is the greatest source of genetic variation in rna virus populations? a) high mutation rate due to lack of proofreading of rna genome replication errors.b) transcription from the host cell rna polymerase introduces numerous mutations.c) capsid proteins from the host cell can replace the viral capsid.d) viral rna is translated by host cell ribosomes.

What are three major influences on whether someone starts to use tobacco