Which part of the neuron receives incoming messages from other cells?

What is an axon?

What chemicals does the nervous system use as its messengers?

José has just played a long, bruising football game but feels little fatigue or discomfort. His lack of pain is most likely caused by the release of:

Which neurotransmitter is most closely associated with regulating mood, sleep, appetite, and is often a target for antidepressant medications?

Certain drugs bind to neurotransmitter receptors and produce effects similar to the neurotransmitter itself. What type of molecule are these drugs considered to be?

The brain and spinal cord make up which component of the nervous system?

Which division of the peripheral nervous system governs involuntary functions, such as your heart beating?

The autonomic nervous system is divided into two parts that often work in opposition to each other. Which part prepares the body for stressful or emergency situations by triggering the "fight-or-flight" response?

What chemicals does the endocrine system use as its messengers?

The most influential endocrine gland is found in the brain. This "master" gland secretes many different hormones, some of which affect other glands. What is the name of this endocrine gland?