Ms.Sastry, AP Biology 1

Chapter 48-Nervous System –in class follow along lecture notes 1) What is a reflex arc? Describe its components. b) What is the difference between CNS and PNS? 2) Label and describe the structure of a neuron. How is its structure related to its function?

Central Questions: check to see if you can answer these! 1) How is an action potential geerted and maintained across a neuron? 2) What are the divisions of the nervous system – describe its part. 3) Describe the structure and function of different parts of the brain.

Ms.Sastry, AP Biology 2

4) Explain the structure and function of a chemical synapse. 5) What is the resting membrane potential – how is it generated and where is it?

Ms.Sastry, AP Biology 3

6) Explain how Na and K ions can regulate the potential of a cell by their movements?

7) Describe how the nerve impulse or action potential is generated and conducted across the neuron to generate the nerve signal. (IMPORTANT)

Ms.Sastry, AP Biology 4

Label these pictures: important! What are they showing?

8) How are nerve impulses conducted along the axon so that it travels to the synapse? How can the speed of transmission be increased?

Ms.Sastry, AP Biology 5

9) How are the different inhibitory and excitatory inputs that arrive at the receiving end of a neuron summated to produce/stop production of action potentials? 10) What is an important evolutionary trend in the development of the nervous system.

Ms.Sastry, AP Biology 6

11) Explain how ions move during the nerve impulse in the axon – use this picture:

11) What is the difference between the somatic nervous system and autonomic nervous system? Also give the divisions of each and state the function of each. 12) State the parts and functions of each of the 3 components- forebrain, midbrain, and hindbrain.

Ms.Sastry, AP Biology 7

13) What is this picture showing: describe why these systems oppose each other; Also which division of the nervous system do they belong to. Finally compare the two divisions. 14) Label the brain and give the important functions of each part:

Ms.Sastry, AP Biology 8

Label the above picture and describe the 5 stages in generating an action potential.

Label the parts and give one function for each part of the brain.