The process of programmed cell death.

Chemical messengers that are secreted directly into the blood.

A group of cytokines that mediate communication between cells.

A hormone that regulates sleep and wakefulness.

A neurotransmitter associated with pleasure and reward.

The disruption of quorum sensing.

Chemical signals used in quorum sensing.

A neurotransmitter involved in muscle activation and other functions.

Immune cells that engulf and digest pathogens and debris.

A signaling molecule involved in various physiological processes.

A hormone that regulates glucose levels in the blood.

A set of genes involved in bioluminescence.

A hormone that stimulates the release of FSH and LH from the anterior pituitary.

Organic compounds derived from ammonia.

Receptors located inside the cell that bind to signaling molecules that can cross the cell membrane.

The front portion of the pituitary gland that releases various hormones.

A process where the end product of a reaction leads to an increase in that reaction.

The neuron that sends a signal across a synapse.

Chemical substances that transmit signals across a synapse.