{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

brendan's study guide - Chapter 3 Study Guide Review...

Info icon This 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?
Image of page 1

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

View Full Document Right 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.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern