The most sensitive portion of the retina of the eye is known as the 

A. cones.
B. fovea centralis.
C. optic nerve.
D. rhodopsin.


B. fovea centralis.

Biology & Microbiology

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The pancreas produces a variety of digestive secretions, including (select all correct choices):

A. lipase for fat digestion. B. trypsin for further protein digestion. C. bicarbonate ions to neutralize stomach acid. D. methane from fermentation. E. gastrin to stimulate HCl production.

Biology & Microbiology

Most sodium chloride is excreted from marine bony fishes through:

a. the kidneys. b. the gills. c. salt glands. d. the feces. e. diffusion.

Biology & Microbiology

Cytoplasm is cleaved in two during the ________ phase of the cell's life cycle.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology

If a physician wanted to collect spinal fluid for analysis s/he would want to place a needle between the:a

dura mater and skull. b. dura mater and pia mater. c. arachnoid and pia mater. d. pia mater and brain. e. dura mater and arachnoid.

Biology & Microbiology