Which of the following molecules would be blocked by a cell membrane?
a. Simple alcohols
b. Water
c. Dissolved oxygen
d. Ions
Answer: d. Ions
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Bacteria growing at lower temperatures have more saturated fatty acids in their membranes.
Answer the following statement true (T) or false (F)
Receptors in the human nose are:
a. chemoreceptors b. mechanoreceptors c. photoreceptors d. nociceptors e. thermoreceptors
All EXCEPT which of the following is true of the
spinal cord? a. houses connections between sensory and motor neurons b. serves as a reflex center c. its gray matter serves as passageway for nerve tracts to brain d. is covered with meninges e. is enclosed by vertebrae
The USFA recommends establishing a rehabilitation operation when the chill factor drops to ___ or lower.
a. 10 degrees F b. 20 degrees F c. 15 degrees F d. 25 degrees F