Which of the following becomes more abundant deeper into the conducting zone (from bronchi to bronchioles)?

A) cilia
B) type I alveolar cells
C) cartilage
D) goblet cells
E) smooth muscle


Answer: E) smooth muscle

Biology & Microbiology

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In organisms, the ability to control osmosis depends on the properties of the plasma membranes of individual cells. Based on their ability to permit the free movement of water and some solutes, these membranes are best described as

(select all correct choices): A. impermeable. B. permeable. C. semipermeable. D. diffusible. E. impervious.

Biology & Microbiology

Consider a cell that has four pairs of chromosomes. What is the number of possible chromosome orientations in that cell?

a. 4 b. 8 c. 16 d. 24 e. 32

Biology & Microbiology

The basement membrane in epithelial tissue

A) waterproofs the epithelium. B) provides strength and support. C) is the layer that contains the dividing cells. D) transmits nervous stimuli. E) contracts to move the skin.

Biology & Microbiology

Unlike virtually all other eukaryotes, diplomonads lack mitochondria. Why aren't these organisms considered to represent a state most like the common ancestor to all other eukaryotes?

A. They have nonfunctional mitochondrial remnants. B. They are phototrophic. C. They do not use ATP to power their cells. D. They have endosymbiotic relationships with other bacteria.

Biology & Microbiology