Download NAME: AP Biology/ Ms. Gaynor (Unit #10: Animal Physiology

NAME: _______________________________________________
AP Biology/ Ms. Gaynor (Unit #10: Animal Physiology)
CHAPTER 48: Nervous System
PART 6
1. Draw and label the parts of a neuron including: cell body, dendrites, nucleus, axon,
myelin sheath, Schwann cells, and Nodes of Ranvier. Then add arrows to your drawing to show the
direction of impulse.
2. Fill in the table below:
Type of Neuron
Description
Sensory Neuron
Motor Neuron
Interneuron
3. What is polarization?
4. When a cell is POLARIZED, how are ions (cations and anions) distributed in a nerve cell?
5. When a cell is DEPOLARIZED, how are ions (cations and anions) distributed in a nerve cell?
6. What does membrane potential mean?
7. What does resting potential mean?
8. Is an unstimulated nerve cell polarized or depolarized? __________________________________
9. How is polarization maintained across a neuron’s membrane?
10. Fill in the table below:
Steps in How a Nerve Impulse Travels
Description
#1:
#2:
#3:
11. Why does a nerve impulse only travel in one direction?
12. How does a nerve reset itself after an impulse?
13. Label the diagram below demonstrating the conduction of the action potential.
14. Label the graph below:
15. What is the refractory period?
16. Why is the myelin sheath important in conducting nerve impulses?
17. What is a synapse?
18. What is the function of neurotransmitters?
19. Give 3 examples of neurotransmitters,
a.
b.
c.
20. Fill in the table below:
Type of Nervous System
Central Nervous System (CNS)
Peripheral Nervous System (PNS)
Description
21. Fill in the table below:
Part of Motor Nervous System
Description
Somatic Nervous System
Automatic Nervous System
22. Draw a outline of a brain and label the following parts: forebrain, midbrain, hindbrain, cerecellum, cerebum,
pons, and Medulla oblongata.
23. Fill in the table below:
Part of Brain
Pons/Medulla Oblongata
Midbrain
24. What is a reflex arc?
Function