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Gr 7 Science Ch 3

Gr 7 Science Ch 3.3 (Nervous, Endocrine, & Reproductive Systems)

TermDefinition
nervous system body system that coordinates body activities
central nervous system (CNS) major division of the nervous system that is composed of the brain and spinal cord
peripheral nervous system (PNS) major division of the nervous system that is composed of the nerves and ganglia
nerves bundles of nerve fibers that connect the central nervous system with the rest of the body
impulses electrochemical message transmitted by a nerve
brain chief organ of the nervous system
cerebrum portion of the brain that controls conscious thought and reason
cerebellum portion of the brain responsible for balance and skeletal muscle coordination
brain stem portion of the brain that connects the rest of the brain to the spinal cord
spinal cord organ that transmits impulses from the brain to the peripheral nervous system
sensory nerve fibers nerve fiber that transmits information to the brain and spinal cord
motor nerve fibers nerve fiver that transmits messages from the central nervous system to the muscles and other organs
sensory receptors any of the special nerve endings that detect the conditions in and around a person
hormones any of the chemical substances responsible for controlling many automatic activities of the body
endocrine system body system that produces hormones
gland body structure that secretes a chemical substance
endocrine glands any gland of the endocrine system
pituitary gland endocrine gland, located at the base of the brain, whose hormones control the action of other endocrine glands
thyroid gland bow-tie-shaped gland that is located below the larynx and produces thyroxine
parathyroid gland several small endocrine glands that work with the thyroid gland to control the amount of calcium in the blood
adrenal gland endocrine gland that produces the hormone epinephrine
islets of Langerhans clusters of endocrine glands within the pancreas that secrete insulin and glucagon
diabetes mellitus disease caused either when not enough insulin is produced or when the body does not respond properly to the insulin that is produced
pineal gland endocrine gland that serves as a clock to control waking and sleeping
reproductive system body system responsible for producing new human beings
gonads organ that produces reproductive cells and sex hormones
egg cell female reproductive cell
sperm cell male reproductive cell
Created by: mbrennan262