The dentist covers the outermost tooth layer, known as the ________, with a protective sealant to keep bacteria in the mouth from damaging it
Fill in the blank(s) with correct word
enamel
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During stressful situations, epinephrine initiates ____
a. dilation of blood vessels to the skin b. dilation of blood vessels to the heart c. constriction of blood vessels to the brain d. a decrease in metabolic rate e. a decrease in blood glucose levels
Which is (are) the predominant second messenger(s)
involved in regulating glucose metabolism? a. insulin b. glucagon c. adenyl cyclase d. cAMP e. all of these
Cells surrounded by plasma membranes and no cell wall need to maintain a certain cell volume because an influx of water would cause the cell to explode
In order to reduce cell volume, these cells increase the activity of their sodium-potassium pumps. Indicate whether the statement is true or false
The Earth's primordial atmosphere had little if any of which of the following gasses?
a) Sulfur b) Carbon Dioxide c) Nitrogen d) Oxygen e) Water