The Nervous System

Lab 8 The Nervous System BIO201L

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Access Code (located on the lid of your lab kit): Click here to enter text.

Pre-Lab Questions:

”1. What is the primary function of the nervous system?”

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”2. Why does the cerebral cortex contain so many folds? ”

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”3. What is a nerve impulse? ”

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”4. What are Schwann cells and what do they form? ”

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”5. What is an all-or-none response? ”

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”6. What two effects might neurotransmitters have? ”

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Experiment 1: Microscopic Anatomy of the Nervous System

Post-Lab Questions

”1. Label the arrows in the slide images below based on your observations from the experiment. ”

 

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B- Click here to enter text.

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”2. What is the major function of the neuron? ”

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”3. Are the nodes of Ranvier spaced equally along the axon? Why is this significant? ”

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”4. Define depolarization. ”

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”5. Describe how Schwann cells form the myelin sheath and the neurilemma. ”

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”6. What determines whether a neuron is unipolar, bipolar, or multipolar? ”

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Experiment 2: Virtual Model – The Nervous System

Post-Lab Questions

”1. Which feature is more superior, the sciatic nerve or the tibial nerve? ”

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”2. What appendages is the radial nerve located in? ”

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”3. Where is the subcostal nerve located? ”

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4. What is the role of the cerebellum?

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5. Which part of the brain regulates taste, touch, pain, and language comprehension?

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6. You are a neurologist and are seeing a patient who was in a car accident and may have sustained brain damage. The patient is having trouble decoding visual information. What part of the brain may have sustained injury?

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Insert your screenshots from the virtual model of your:

6. a) Intercostal Nerve

 

6. b) Sciatic Nerve

 

 

11. a) Corpus Callosum

 

 

11. b) Cerebral Peduncle:

 

Experiment 3: Cow Eye Dissection

Post-Lab Questions

”1. How does the eye work? ”

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”2. What is the hole in the center of the iris? What is its function? ”

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”3. What are the material properties of the lens? ”

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”4. What is the blind spot of the retina? ”

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”5. What is the purpose of the reflective material in the choroid coat? What is it called? ”

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”6. How did the image appear when you looked through the lens? ”

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”Image of dissected eye with the lens removed with your name and access code handwritten clearly in the background: ”

 

 

 

Experiment 4: Brain Mapping

 

Post-Lab Questions

”1. Describe the function of three areas of the brain (you choose which areas you wish to discuss. ”

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”Insert your swim cap photos here:

 

 

 

 

 

Experiment 5: Sheep Brain Dissection

Post-Lab Questions

”1. How does the sheep brain compare to the human brain? Name at least two differences. ”

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”2. What two lobes does the central sulcus separate? ”

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”3. How does the size of the olfactory bulb in sheep relate to the size in humans? What might this tell you about the sense of smell in the sheep’s survival, in particular about how it acquires food? ”

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”4. What circulates through the ventricles? What is the function? ”

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”5. Describe the function of each region of the cerebral cortex. ”

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”Insert photo of the dissected sheep brain with your name and access code handwritten clearly in the background: ”

 

Experiment 6: Reflexes

Post-Lab Questions

”1. What is the papillary response of the right eye when a light was shone into the pupil? ”

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”2. What is the consensual response (The response of the left eye)? ”

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”3. What branch of the nervous system controls this response? ”

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”4. Can this response be inhibited? ”

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Experiment 7: Reflexes (Part II)

Table 2: Reflex Data

Reflex Trial 1: Distance Caught (cm) Trial 2: Distance Caught (cm) Trial 3: Distance Caught (cm)
Visual Click here to enter text. Click here to enter text. Click here to enter text.
Verbal Click here to enter text. Click here to enter text. Click here to enter text.
Tactile Click here to enter text. Click here to enter text. Click here to enter text.

 

 

Post-Lab Questions

”1. Define what a reflex is. ”

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”2. Name five essential components of a reflex arc. ”

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”3. What does your data tell you about visual, verbal, and tactile responses? ”

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Experiment 8: Fetal Pig Dissection- Nervous System

Post-Lab Questions

”1. Did you notice a covering on the spinal cord? What is it? ”

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”2. Describe the properties of the vertebral column. Why are these important? ”

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”3. What is the difference between white and gray matter? ”

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”4. Research multiple sclerosis. What is the effect of this disease on the nervous system? ”

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”Image of dissected fetal pig with spine exposed with your name and access code handwritten clearly in the background: ”

 

 

 

 

 

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