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Home Q & A Board Biology-Related Homework Help Anatomy and Physiology
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karolynt karolynt
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10 years ago
At a chemical synapse, the intensity of the stimulus is coded for by
a. the size of the action potential
b. the amount of neurotransmitter released
c. the amount of calcium that enters the axon terminal
d. the size of the action potential and the amount of neurotransmitter released
e. the amount of neurotransmitter released and the amount of calcium that enters the axon terminal

Calcium and magnesium are both
a. monovalent cations
b. divalent cations
c. monovalent anions
d. divalent anions

Thanks
Source  PhysioEx 9.0
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padrepadre
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10 years ago
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#2
10 years ago
calcium = Ca2+
magnesium = Mg2+

Cations are positive while anions are negative.  Therefore calcium and magnesium are Cations. 

The prefix mono means 1 and the prefix di or bi mean 2.

Calcium and magnesium are 2+ which means they are divalent.  If they were monovalent they would read Ca+ and Mg+.

Calcium and magnesium are both divalent cations.
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