What is a characteristic of REM sleep?
a. During the REM stage, delta waves are emitted.
b. Most people spend almost all of their sleep time in the REM stage.
c. The preoptic area of the hypothalamus stimulates REM sleep.
d. During REM sleep, blood flow to the frontal lobe increases.
e. Brain waves change to a desynchronized pattern during REM sleep.
e
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The proton motive force is most often generated by splitting of H2
Indicate whether the statement is true or false.
What type of antibody is produced first after the initial exposure to antigen?
A. IgD B. IgM C. IgE D. IgA E. IgG
Bush and colleagues (2010 ) photographed body and head lice on several cockatoos and compared the ________ of the lice on the bird's bodies and heads
A) size B) luminosity C) weight D) shape
Vascular plants and air-breathing animals first appeared during which time period?
a. Silurian period b. Permian period c. Cambrian period d. Ordovician period e. Cretaceous period