Because they have similar chemical structures, morphine and heroin are able to lock into receptor sites for __________.

Curare, a poison, works by __________.

In a laboratory, smokers are asked to “drive” using a computerized driving simulator equipped with a stick shift and a gas pedal. The object is to maximize the distance covered by driving as fast as possible on a winding road while avoiding rear-end collisions. Some of the participants smoke a real cigarette immediately before climbing into the driver’s seat. Others smoke a fake cigarette without nicotine. You are interested in comparing how many collisions the two groups have. In this study, the participants who smoke a cigarette without nicotine make up the __________.

A good control group __________.

The administration of Midwest State University wants to know if the arrangement of chairs affects student participation in classrooms. What would be a good operationalization of the dependent variable in an experiment designed to measure this relationship?

Which of the following regions contains the somatosensory cortex?

The word correlation is often used as a synonym for __________.

Messages from the brain to the muscles and glands in the body begin their journey in the __________.

The point at which the nerves from the left side of the body cross over into the right side of the brain and vice versa is called the __________.

Neurons found in the center of the spinal cord that receive information from the sensory neurons and send commands to the muscles through the motor neurons are called __________.