Nervous System Review Human bio 11. Parts of the Nervous System.
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Transcript of Nervous System Review Human bio 11. Parts of the Nervous System.
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Nervous System ReviewHuman bio 11
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Parts of the Nervous System
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1. Central Nervous System (CNS)
O Includes:O Brain
O It is the control centerO Takes signals from the sense organsO Processes the infoO Sends out new signal telling the body
what to do.
O Spinal cordO A tube of neurons
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2. Peripheral Nervous System
O Nerves that extend beyond the brain and spinal cord.
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3. Autonomic Nervous System
O Controls the parts of the body that act without thinking, such as: stomach, intestines, glands…
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What is a Nerve?O Nerves are the body’s major cables
and contain hundreds of neuron fibers.
O The fibers run to every nook and cranny of the body.
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What is a Neuron?O The nervous system is made up of
cells called neurons.
O They have spindly fibers that carry electrical signals.
O Some neurons (nerve cells) are several feet long!
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ReflexesO When you touch something hot or cold
your body sends signals to the brain to tell the body how to react.
O Process:O Cells in hand detected heat. O Nerves send message to spinal cord.O Spinal cord decides what to do.O Nerves from spinal cord tell the hand
what to do.O Message is to let go of the object.
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The BrainO Color is pinkish-brownO Size of 2 fistsO Wrinkly surface (folds)O Divided into lobesO Two hemisphere with different
abilities and charateristics
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1. MedullaO The smallest part of the brainO Thick stalk at the base of the skullO Connects brain to the spinal cordO Controls involuntary movement
(Examples??)O BreathingO DigestionO HeartbeatO SneezingO Blinking
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2. CerebrumO Largest part of the brainO Surface has many folds to pack in
more cellsO Cerebrum is divided into lobes.
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Lobes of the BrainO A. Frontal lobe
O Conscious thoughtO PlanningO Free will
O B. Parietal lobeO MovementO SensationO Orientation
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…Lobes of the BrainO C. Occipital Lobe
O Main job is to process information that comes from your eyes
O D. Temporal LobeO SpeechO LanguageO Sound
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…Lobes of the BrainO E. Cerebellum
O Helps coordinate your body’s movement and keepsyou balanced.
O F. Brain StemO This is located at the base of the brainO Vital for basic life support systems, like
heart beat, breathing. O If your brain stem stops doing its job, you
are considered brain dead
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QUIZ NEXT CLASS!!O Open book (but please study!!)O Topics include:
O NervesO Neuron (label and define parts)O Brain (lobes: label and define)O Central Nervous System CNSO Peripheral Nervous System PNSO Autonomic nervous system
O Types of questions: Fill in the blanks, labelling, multiple choice, matching, short answer.
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OComplete the Nervous system web search
OThis is to be handed in before the end of class!!