Research published in January 2017 presented an estimate of the prevalence of HPV infection in American males at 45%. Adult males are an unvaccinated population. What are the consequences of HPV infection in males?
A. Males can develop genitourinary tract cancer from HPV infection.
B. There are no long-term consequences; a course of antiviral medication will clear up the infection.
C. HPV-infected males should also be screened for gonorrhea, as the two often co-infect.
D. Males with HPV have a significantly higher likelihood of developing prostate cancer.
Answer: A
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In a frog embryo, gastrulation
A. produces a blastocoel displaced into the animal hemisphere. B. occurs along the primitive streak in the animal hemisphere. C. is impossible because of the large amount of yolk in the egg. D. proceeds by invagination and involution as cells roll over the dorsal lip of the blastopore. E. occurs within the inner cell mass that is embedded in the large amount of yolk.
The food vacuoles and phagocytic vacuoles are most similar to
A. chloroplasts. B. lysosomes. C. Golgi apparatus. D. mitochondria.
Which of the following is NOT considered to be a true pathogen?
a. Human Immunodeficiency virus b. Candida albicans c. Plasmodium protozoan d. Mycobacterium tuberculosis
Calculate the partial pressure of oxygen at a barometric pressure of 500 mm Hg if oxygen is 20% of the air.
a. 500 mmHg b. 100 mmHg c. 20 mmHg d. 160 mmHg e. 10,000 mm H