Describe the role of the reticular activating system in sleep, arousal, and consciousness
What will be an ideal response
A variety of sensory stimuli feed into the RAS, which feeds into the thalamus and cerebral cortex to increase neuronal activity, causing arousal from sleep and maintaining consciousness. During periods of high ATP use, adenosine accumulates and binds to A1 receptors, inhibiting cholinergic neurons in the RAS, and inducing sleep.
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Pancreatic juice is secreted by the exocrine pancreatic acini.
Answer the following statement true (T) or false (F)
The first heart sound ("lubb") is associated with
A) atrial systole. B) closing of the atrioventricular valves. C) opening of the atrioventricular valves. D) closing of the semilunar valves. E) opening of the semilunar valves.
When diagramming an atom, how many electrons can fit in each of the shells beyond the innermost shell?
A. Ten B. Six C. Eight D. Two
Damage to the vestibulocochlear nerve would result in some loss of
A. hearing and balance. B. hearing and taste. C. smell. D. taste. E. hearing and sight.