Place the following nerve impulse events in the correct sequence:
Resting neuron
Stimulus arrives
Sodium channels open
Sodium ions diffuse inward, depolarizing the membrane
Potassium channels open
Potassium ions diffuse outward, repolarizing the membrane
Action potential generated & propagated along entire length of neuron

Students in biology are studying the macromolecules of life. they used a calorimeter to determine the calories in various types of food. once the lab was completed, the students ate the left over food samples. monica commented that in just 6 or 7 "chews" of the saltine, it was gone; nothing but a sticky paste in her mouth. elaborate on what happened chemically while chewing the saltine. include the macromolecules present.

Jason adds the antibiotic penicillin to a bacterial culture. the bacteria develop genetic modifications in their genome, which gives them resistance to the antibiotic penicillin. what caused this genetic modification?

(amoeba sisters video recap: pedigrees and need