Gap junctions in the intercalated discs allow impulses to be spread across the heart more quickly. This is because gap junctions allow particles/signals to pass through, thus making cells with gap junctions more able to interact.
One more thing—you posted this in the physics section rather than biology.
Answer:
there is friction between the two things
Explanation:
Answer:
laser pointer does not make use of total internal reflection
Answer: I would say the answer is B.
Explanation: It looks and sounds the most correct.
See the attached picture for answers
