The Nervous System/Eye/Ear

A state of stability within the body

Consists of the brain and spinal cord, integrates and processes information sent by nerves

Consists of nerves that carry sensory messages to the central nervous system and nerves that send information from the CNS to the muscles or glands

Consists of sensory receptors in the head and extremities, nerves that carry sensory info to the CNS and nerves that carry instructions from the CNS to the skeletal muscles

Controls glandular secretions and the functioning of smooth and cardiac muscles

Act as a counter to one an other to bring the body back to homeostasis

The neurons and the cells that support the neurons called glial cells are the only two main type of cells in the nervous system

basic structural and functional units of the nervous system. They are specialized to respond to physical and chemical stimuli, to conduct electrochemical signals and to release chemicals that regulate various body processes

Glial cells outnumber neurons 10 to 1, and they account for about half of the volume of the nervous system. Glial cells nourish the neurons, remove their waste, and defend against infections

Individual neurons are organized into tissues called nerves

Gather information from the sensory receptors and transmit these impulses to the central nervous system

Are found entirely in the CNS. Act as link between the sensory neuron and the motor neuron

Transmit information from the CNS to muscles or glands

Sudden, unlearned, involuntary response to certain stimuli. Simple connections of neurons that require very few neurons to transmit messages

Short Branching terminals that receive nerve impulses from other neurons or sensory receptors and relay the impulse to the cell body.