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38 Cards in this Set

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  • Back
Central Nervous System
consists of the brain and the spinal cord
Peripheral Nervous System
consists of all the parts of the nervous system except for the brain and the spinal column
neuron
is a nerve cell that is specialized to receive and conduct electrical impulses
nerve
is a collection of axons bundled together with blood vessels and connective tissue
somatic nervous system
consists of neurons under conscious control
autonomic nervous system
are nerves that do not need your conscious control such as digestion or heart rate
sympathetic nervous system
part of the autonomic nervous system whereby pupils dilate, heart rate increases, digestion slows, etc.
parasympathetic nervous system
part of the autonomic nervous system whereby pupils constrict, heart rate slows, digestion returns to normal..
brain
a mass of nerve tissue that is the main control center of the nervous system
cerebrum
a dome-shaped area where you think and memories are stored. It contains voluntary movements and allows senses
hemispheres of brain
leftside controls speaking, reading, solving problems, right side controls emotions,
music, and spatial thinking
cerebellum
processses sesory info from your body such as skeletal muscles and joints
medulla
connects to your spinal column and controls involuntary processes
spinal cord
is made up of neurons and bundles of axons that pass impulses to and from the brain
reflex
an involuntary and almost immpediate movement in response to a stimulus
feedback mechanism
is a cycle of events in which info from one step controls or affects a previous step
retina
the light sensitive inner layer of the eye that receives imatges and sends them to the brain
cones
are sensitive to bright light that also allows you to see fine details and color
rods
are sensitive to dim light and allow you to see at night in black and white
cornea
is at the front of the eye that is a clear membrane
pupil
is an opeing that allows light to enter the eye
iris
is the color part of the eye
cochlea
is a coiled tube that is found in the inner ear and is essential to hearing
eardrum
is a thin membrane separating the outer ear from the middle ear
papillae
are tiny bumps that contain taste buds
olfactory cell
is a nerve cell that responds to chemical molecuses in the air
endocrine system
is a collections of glands that regulate growth, development and homeostats
gland
is a group of cells that make special chemicals for the body
hormone
is a chemical messenger made in one cell or tissue that causes a change in another cell somewhere else in body
adrenal gland
release epinephrine or adreneline that increases your heartrate and breathing called "fight or flight"
pituitary gland
stimulates skeletal growth and helps the thyroid gland. It regulates water in blood and stimulates birth process
thyroid gland
a gland important during infancy and childhood that controls growth hormones and body metabolism
thymus gland
a gland important to your immune system that makes killer T cells to help destroy viruses or bacteria
pancreas
regulates blood flucose levels
ovaries
produces hormones needed for reproduction in females
testes
produces hormones needed for reproduction in males
parathyroid
regulates calcium levels in the blood
insulin and glucagon
are two hormones produced by the pancreas