Nervous and Chemical Control Vocab

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Chapter 15

axon

part of the neuron that sends messages to surrounding neurons or body organs

brain

organ that sends and receives messages to and from all body parts

cerebellum

brain part that helps make you movements smooth and graceful rather than robotlike

cerebrum

brain part that control thought, reason, and the senses

dendrite

parts of the neuron that receive messages from nearby neurons

diabetes mellitus

disease that results when the pancreas doesn't make enough insuiln

endocrine system

made of small glands that make chemicals for carrying messages through the body

hormone

chemicals made in one part of an organism that affect other parts of the organism

insulin

homone that lets your body cells take in glucose and sugar from your blood

medulla

brain part that controls heartbeat, breathing, and blood pressure

nerve

many neurons bunched together

nervous system

made of cells and organs that let an animal detect changes and respond to them

neurons

nerve cells

pituitary

an endocrine gland that forms many different hormones;
the master gland

reflex

protective reactions that occur within the nervous system

spinal cord

part that carries messages from the brain to body nerves or from body nerves to the brain

synapse

small space between the axon of one neuron and the dendrite of a nearby neuron

thyroid gland

an important endocrine gland found near the lower part of your neck

thyroxine

the hormone that controls how fast your cells release energy from food

response

the action of an organisms because of a change in its environment

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