What is the IQ of a 12-year-old with a mental age of 16?

Voltage-activated channels are channels for which a change in the voltage across the membrane alters their ____

a. permeability b. length c. number d. threshold

When you give directions and point down the street, the part of the peripheral nervous system that controls this voluntary movement of your finger is the __________ nervous system

Fill in the blank(s) with correct word