Which statement is a characteristic of a convex lens? a. it absorbs most light. b. it is thickest at the edges. c. it bends light rays inward. d. it is always made of glass.

it bends light inward

Explanation:

the other answers are wrong

a- lens don't absorb light, that's the opposite of what a lens does. it refracts light it cant absorb light. if it absorbed light then lenses would be useless.

b-that's concave lenses

d- contacts are made with plastic. anything that is transparent will work if it is shaped right.

a motor homunculus represents a map of brain areas dedicated to motor processing for different anatomical divisions of the body.

homunculus represents the importance of various parts of your body as seen by your brain. as a result, they take up a lot of brain space. although the cortical homunculus is a curiosity, penfield's work in mapping the brain's relationship to the body was invaluable.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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