brendan's study guide

Brendan's study - Chapter 3 Study Guide Review Questions 1 Name and describe the functions of the three main parts of the neuron Cell Body contains

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 3 Study Guide Review Questions 1. Name and describe the functions of the three main parts of the neuron. Cell Body- contains the nucleus, which directs the manufacture of substances that the neuron needs for growth and maintenance. Dendrites- receive info towards the cell body Axon- the tail looking thing that carries info away from the cell body towards other cells 2. How do glial cells differ from neurons? What functions do they have in the nervous system? Gliall cells are not specialized to process information like the neurons are. Their job is to provide support and nutritional benefits functions in the nervous system. They help or nutritive role for neurons 3. What causes the resting potential of neurons? Under what condition is a neuron said to be in a state of polarization? When the Ion channels are closed and its negatively charged on the inside and positivity charged on the outside. This is when it is at a state of polarization, when it is resting and not sending any info. 4. What chemical changes cause the process of depolarization that creates action potentials? The ion channels open when a impulse comes and that allows the positive sodium to enter the axon making it more positive. Then there is depolarization because the charge difference from the inside and outside is small. 5. What is the nature and importance of the myelin sheath? Which disorder results from inadequate myelinization?
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Myelin sheath- layer of fat cells, encases and insulates most axons. It speeds up transmission of nerve impulses. Multiple Slerosis(MS) and Adrenoleukodystrophy (ALD) are disorders involving myelin sheath. 6. How do neurotransmitters achieve the processes of excitation and inhibition of postsynaptic neurons? The neurotransmitters when released in the synaptic gap will chemically bind to the membrane and either excite the neuron, bringing it closer to the threshold at which it will fire or inhibit the neuron from firinig. 7. Describe two methods by which neurotransmitter molecules are deactivated at the synapse. 8. Describe the roles of acetylcholine, dopamine, serotonin, and endorphins in psychological functions. Acetylocholine- stimulates the firing of neurons and is inovolved in the action of
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/14/2012 for the course PSYCHOLOGY 101 taught by Professor Smith during the Spring '11 term at DePauw.

Page1 / 7

Brendan's study - Chapter 3 Study Guide Review Questions 1 Name and describe the functions of the three main parts of the neuron Cell Body contains

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online