Nerve impulses are transmitted through neurons as electrical signals. When a neuron is stimulated, ion channels open, causing an action potential to travel along the axon to the synapse, where neurotransmitters are released to transmit the signal to the next neuron.

Hormones are chemical messengers secreted by endocrine glands that regulate processes such as growth, metabolism, immune function, and reproduction. They act on target organs or cells to initiate specific physiological responses.

Coordination in biology refers to the regulation and integration of different biological processes within an organism to ensure its functions are harmonious and efficient.

The nervous system controls and coordinates body functions, responding to stimuli through electrical impulses and regulating activities like movement, thought, and sensation.

Neurons are specialized cells that transmit electrical signals, enabling communication between different parts of the body. They play a key role in sensory perception, motor control, and cognition.

A synapse is the junction between two neurons, where electrical signals are transmitted through the release of neurotransmitters.

Reflex action is an involuntary, rapid response to a stimulus, typically mediated by the spinal cord, bypassing the brain for quick action.

The endocrine system regulates various bodily functions through the release of hormones, controlling processes such as metabolism, growth, and reproduction.

A hormone is a chemical messenger produced by glands that regulate specific physiological processes in the body, such as growth, metabolism, and mood.

The pituitary gland, known as the ‘master gland,’ regulates other endocrine glands and controls important functions such as growth, reproduction, and metabolism.