Which of the following areas of the respiratory tract is lined with a single layer of epithelial cells?
a. nasal cavity
b. larynx
c. trachea
d. bronchi
e. alveoli
e
You might also like to view...
Compare the events of meiosis I and II in the production of gametes
What will be an ideal response?
The placenta performs all of the following functions EXCEPT for ____
a. mixing maternal and fetal blood for immunity b. oxygen delivery to fetus c. waste removal from fetus d. progesterone production e. nutrient delivery to fetus
An increase in urine production could cause
A. an increase in blood volume. B. a decrease in blood volume. C. an increase in blood pressure. D. both an increase in blood volume and an increase in blood pressure. E. both a decrease in blood volume and an increase in blood pressure.
Suppose that in DNA sequence comparisons of a homologous region in various species, the region shows a low level of polymorphism. What could account for this?
What will be an ideal response?