Which function is NOT performed by glia? Question 7 options: a. removing waste materials b. transmitting information over long distances c. guiding the growth of axons and dendrites d. building myelin sheaths Question 8 (Mandatory) (1 point) What is the main source of nutrition for vertebrate neurons? Question 8 options: a. complex carbohydrates b. glucose c. fats d. sodium Question 9 (Mandatory) (1 point) Which of the following is true when a neuronal membrane is at resting potential? Question 9 options: a. Potassium ions flow quickly and easily. b. Sodium ions are not permitted to flow inside a neuron. c. Sodium ions pass slowly. d. Potassium ions are blocked