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Name: ______________________________________________ Hour: ________ Teacher: ROZEMA

Bad Fish Unit

-Part 3-

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What Do We Know So Far??

What Are We Still Trying To Figure Out? What does Tetrodotoxin do to the Nervous System?

How does blocking the Sodium Channels impact the Nervous System?

and

How does tetrodotoxin cause….?

Bradycardia

Hypoventilating

Diaphoresis

Paresthesias

Cyanosis

Motor Dysfunction & Ascending Paralysis

Headache

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Neuron & Nerve Impulse Modeling Things to Know About a Neuron:

Structures called DENDRITES ___________________________________________________________________

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A Structure called the CELL BODY _______________________________________________________________

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A Structure called the AXON ___________________________________________________________________

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The AXON has channels/openings along it called SODIUM and POTASSIUM channels.

These channels ______________________________________________________________________________

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Structures called AXON TERMINALS _____________________________________________________________

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Below DRAW out a flow chart / picture to

represent all of the structures on a neuron:

Now combine them into a group model!

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Things to Know About Nerve Impulses:

When a neuron is not doing anything it is said to be in its _____________________________________________

During Resting Potential _______________________________________________________________________

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A neuron will send a message when _____________________________________________________________

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A neuron “message” is called a ___________________________________________________

Nerve Impulses happen in 2 steps: ______________________________________________________________

During Depolarization _________________________________________________________________________

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Directly after each Depolarization act is ________________________________

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During Repolarization _________________________________________________________________________

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The neuron goes through ____________________________________ and ______________________________

over and over until ____________________________________________________________________________

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Once the Nerve Impulse reaches the _____________________________________________________________

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At the end of EVERY Nerve Impulse a neuron needs to _______________________________________________

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Below DRAW out a picture that shows what is

happening in a neuron, during a Nerve Impulse:

Now combine them into a group model!

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Brain Anatomy Lobe / Structure

Name Orientation Function

Frontal Lobe The front of the brain, behind where your

forehead and eyes are.

Parietal Lobe The top of the brain, directly behind the frontal

lobe.

Occipital Lobe The very back of the brain, on top of the cerebellum.

Cerebellum A squiggly, almost cauliflower like structure

near the back of the brain, sitting on top of the brain

stem.

Brain Stem A tail like structure that comes off the

bottom/back of the brain.

\

Pons On the very front of the Brain Stem, Closest to the

Brain.

Midbrain Near the top of the Brain Stem, directly behind the

Pons.

Medulla Oblongata

Near the top of the Brain Stem, directly behind the

Midbrain.

Temporal Lobe The very center side of the brain.

Thalamus & Hypothalamus

Within the Temporal Lobe

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Produces speech using Broca’s Area.

Allows for problem solving, concentration,

and planning.

Initiates voluntary muscle contractions

Interprets speech, sounds, and

surroundings.

Picks up on skin sensations.

Controls Vision.

Allows for interpretation of Sensations.

Controls memory.

Controls hearing.

Helps with learning and connecting

concepts.

Hypothalamus controls body temperature,

fluid ion levels, metabolism and sleep.

Thalamus controls sensory neurons.

Controls the fluidity and

coordination of muscles.

Controls respiratory reflexes.

Controls fight or flight

response.

Maintains several

homeostatic functions

including heart rate, blood

pressure, digestive reflexes.

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Nervous System Organization

Response Path for a Voluntary body response:

Response for an Involuntary, Emotional body response:

Response for an Involuntary, Non-Emotional body response:

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