What is the major organ of the integumentary system? how much surface area does this organ cover? are the 3 layers within this organ?

What is the goal of cellular respiration

Imagine a person stepping on a pin and pulling his or her foot away. look at the reflex arc of this scenario below. which statement best describes the image? a)the sensory nerve carries the signal from the effector to the interneuron, and the motor neuron carries the signal to the receptor. b)the motor nerve carries the signal from the receptor to the interneuron, and the sensory neuron carries the signal to the effector. c)the sensory nerve carries the signal from the receptor to the interneuron, and the motor neuron carries the signal to the effector. d)the sensory nerve carries the signal from the receptor to the motor neuron, and the interneuron carries the signal to the effector.

The diagram is represented of a part of a plant cell. identify the locations where proton concentration builds up during photosynthesis and cellular respiration