Task 1: Neurons in the brain 1. Watch the video Neuron action potential - physiology (Osmosis, 2016). 2. Answer the following four related journal questions (a-d) using one or two sentences for each question. a) What is the role of the neurotransmitter compared with the action potential? Click or tap here to enter text. I b) What role do dendrites play in generating action potentials? Click or tap here to enter text. c) What is an absolute versus relative refractory period? Click or tap here to enter text. d) What is saltatory conduction? Click or tap here to enter text.