In this chapter, you will learn about the processes involved in transforming light energy into the potential energy in ATP and NADPH molecules, which are then used as sources of energy for building food molecules (carbohydrates). Before beginning this chapter, you should be able to describe the energetic differences between catabolic and anabolic pathways in metabolism (see Concept 8.1). The following question provides a quick check of your basic knowledge in this area.

Which of the following is a true statement?
Anabolic pathways build molecules, require energy, and are endergonic.

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.