Neurons and Glia PDF

Preview

Summary

For Maria Castaneda's class...

Description

Week 1 CSHR Activity

Neurons and Glial Cells

Problem #1- Neuroglia a. Color the following structures as follows: Body of neuron (blue) Oligodendrocyte (green) Capillary (red) Nodes of Ranvier (orange)

Astrocyte (purple) Myelin Sheath (pink)

A b. Identify the neuroglia that each statement is describing:  Line the ventricles of the brain o Ependryrmal  Form myelin of neurons in the CNS o Oligodendrocytes  Engulf any bacteria and debris o Microglia  Form myelin of neurons in the PNS o Schwan cells_

Ependymal cells (yellow) Microglial cells (brown)



Bind neurons with blood vessels o Astrocytes (most abundant)

Problem #2- Neuron Structure and Function a. Color and label the different structures of a neuron. Label the direction of signal transduction through a neuron.

Soma Nucleus Axon hillock Dendrites

Axon Myelin Neurilemma Axon terminals

Node of Ranvier Schwann cell

b. Identify the structures of a neuron that each statement is describing:  Process conducting impulses toward the cell body i. Dendrites  Process conducting impulses from the cell body i. Axon  Fatty insulation on some neuron processes i. Myelin Sheath  Small spaces between myelin sheath i. Nodes of Ranvier

  

Lines the axon (and myelin if present) i. Neurilemma Cell that provides fatty insulation for neuron i. Oligodendrocytes CNS and Schwann cells PNS Forms a junction with post-synaptic cell i. Axon terminal

Problem #3- Nervous System Breakdown a. In the diagram below label the following structures: Central nervous system neuron (direction)

Peripheral nervous system Association neuron Proprioceptors

b. Answer the following questions regarding the nervous system: 1) The central nervous system consists of these two structures: - Brain, spinal cord 2) What does the peripheral nervous system consist of? - Everything else 3) Afferent means Arriving while efferent means Exciting.

Afferent neuron (direction) Efferent Interoceptors Exteroceptors

4) Why are interneurons considered association neurons? -

Control sensory and motor neurons

5) Anatomical directions: exteroceptors can be found External compared to the interoceptors which are more Internal.

Problem #4- Functional Divisions of Nervous System a. Fill in the spaces below regarding the division of the nervous system.

b. Answer the following questions about the nervous system: 1) Define somatic and autonomic. o Somatic; voluntary movement o Autonomic; involuntary movement

-

2) Define sympathetic and parasympathetic. Sympathetic; excites the flight or fight response Parasympathetic; the Rest and Digest

3) What are effectors? - An organ response to stimulus o Glands and muscles

4) What division of the PNS do you have voluntary control over? Which types of muscle tissue are made for this? - Somatic Division o Skeletal o 3 main cardiac smooth

5) Which division of the PNS do you not have voluntary control over? Which types of muscle tissue are made for this? - Autonomic o Cardiac- smooth...