Messages flow from the brain to the spinal cord and then to other parts of the body through the nervous system

A group of student researchers divide up the different times

and buildings on their campus to attempt to determine when people will hold a door open for another person. These student researchers are most likely to use which research method design when conducting their study? A) Case study design B) Correlational design C) Experimental design D) Naturalistic observation design

A young woman returns from a day at the beach to find she has developed severe sunburn. Which neurons are sending messages from her burned skin to her brain informing her of the pain from the burn?

a. motor neurons b. interaction neurons c. afferent neurons d. efferent neurons