As positively charged sodium ions enter the axon, flow(s) out to repolarize part of the axon a. potassium ions

b. a neural impulse

c. the action potential

d. glial cells

Animals respond in various ways to stimuli detected through their senses. some of these responses are stimulated by the presence of danger. which of these animal responses is the best example of a response to an immediate threat? a) a rooster crows every morning at the first sign of light. b) as something approaches an octopus, it shoots a cloud of ink. c) from late fall until spring, bears hibernate to preserve energy. reactivate d) a dog is getting hot in the sunlight, so he moves to a shaded area.

Simple machines can a. increase force only b. decrease force only c. increase or decrease force

Coal contains energy. a. light b. kinetic c. chemical d. mechanical