The function of the rugae of the stomach is to:
a. secrete amylase.
b. crush the food.
c. increase the holding capacity of the stomach.
d. mix the food with gastric juices.
e. increase the surface area for secretion.
C
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Hydrogen sulfide
A. is produced when sulfur compounds are used as terminal electron acceptors. B. may react with iron to produce a black precipitate. C. is produced by Desulfovibrio. D. has a rotten egg smell. E. All of the choices are correct.
Protein synthesis inhibitors have a low therapeutic index because they usually cannot discriminate between prokaryotic and eukaryotic ribosomes.
Answer the following statement true (T) or false (F)
An organism that uses light for energy and carbon dioxide as a carbon source is a
A) Chemoorganoheterotroph B) Chemolithoautotroph C) Photolithoautotroph D) None of the above
When you look at an image, it is inverted on the back of the retina and yet appears right-side-up when perceived in the brain. What part of the body is responsible for inverting the image?
Select one: a. the retina b. the rods and cones c. the optic nerve d. the brain e. the lens