5. In the context of muscle contraction, what is the role of ATP (adenosine triphosphate)? a) It provides oxygen to muscles. b) It is a neurotransmitter that signals muscle contraction. c) It supplies ...

In order to help our students clear all the concepts and understand the topics explained in NCERT Class 11 Biology chapter – Breathing and Exchange of Gases, we are providing here the NCERT solutions.