Describe the structure and function of the blood air barrier
What will be an ideal response?
The blood air barrier is made up of the fused basement membranes of the alveolar epithelium and capillary endothelium. Because it is very thin and oxygen and carbon dioxide are lipid soluble, diffusion occurs rapidly across the membrane.
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Which group of muscles forms a thick, fleshy mass at the base of the thumb?
A. Hypothenar group B. Thenar group C. Midpalmar group D. Dorsal interossei group E. Abductor digit group
Painful menstruation is called
A) dysmenorrhea. B) polymenorrhea. C) amenorrhea. D) menorrhea. E) nocimenorrhea.
Jill lives in St. Louis, which is close to sea level. She decides to spend a month of her summer vacation working in the mountains outside of Denver. After a week in the mountains, what kinds of changes would you expect to see as Jill adapts to the higher altitude?
A) decreased alveolar ventilation rate B) decreased blood pressure C) decreased hematocrit D) decreased PO2 in the alveoli E) All of the answers are correct.
Consider a mother with normal vision who has a son with red-green color blindness. The mother was a "carrier" of the affected gene, as she had a normal phenotype but
A. two recessive alleles. B. an incompletely penetrating genotype. C. two dominant alleles. D. one dominant and one recessive allele. E. a codominant set of alleles.