Which part of the respiratory system carries out gas exchange?

A. lungs
B. larynx
C. nasal cavity
D. diaphragm
E. bronchus


Answer: A

Biology & Microbiology

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As elevation increases

a. O2 availability increases. b. O2 availability decreases. c. O2 availability remains constant. d. O2 levels increase, but there is none present above 20,000 feet. e. O2 levels decrease, but there is none present above 20,000 feet.

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Blood pressure is typically recorded as two numbers; the higher number corresponds to the ________ pressure

Fill in the blank(s) with correct word

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An ectopic pregnancy occurs when a fertilized egg implants somewhere other than in the lining of the uterus. Usually it implants in the oviduct. Which of the following would be the most likely explanation for such a pregnancy being unsuccessful?

A) The orientation of the baby would be sideways. B) Human chorionic gonadotropin (hCG) cannot be produced in the oviduct. C) The lining of the oviduct is unable to support the developing fetus. D) The necessary hormones cannot reach the developing fetus in the oviduct.

Biology & Microbiology

Failure of thymus development may result in

A) type I diabetes. B) Grave's disease. C) Bruton-type agammaglobulinemia. D) DiGeorge syndrome. E) chronic granulomatous disease.

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