Exam 1 answers

Exam 1 answers - NAME: _ PSYC 372 005 Fall 2009: EXAM I (A)...

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NAME: ________________________________________ PSYC 372 – 005 Fall 2009: EXAM I (A) MULTIPLE CHOICE (1 pt each): PLEASE WRITE THE LETTER OF THE BEST ANSWER IN THE SPACE PROVIDED. Correct answers highlighted in yellow _____ 1. In order for ions to cross from the extracellular fluid to the intracellular fluid across a membrane, they must: a. be of an opposite electrical charge relative to the internal environment of the cell. b. pass through protein channels embedded in the membrane. c. first have a neurotransmitter bind to a receptor to allow their entry d. Majority of class got this question wrong! Everyone received +1 for this question _____ 2. The “powerhouse” of the cell, which provides energy for various cellular functions, is the _______________. a. Nucleus b. Endoplasmic Reticulum c. Mitochondria d. Ribosome _____ 3. Contained within this cellular structure are the genetic instructions for the cell: a. Nucleus b. Endoplasmic Reticulum c. Mitochondria d. Ribosome _____ 4. Neurons are different from glial cells because they: a. are able to respond to chemical messengers located in the extracellular fluid. b. have specialized components for integrating and distributing information over long distances in the body. c. are located throughout the central nervous system AND the peripheral nervous system. d. are able to release chemicals onto other cells. _____ 5. The main sites of neurotransmitter release are the: a. Presynaptic terminals b. Dendritic spines c. Postsynaptic terminals d. Receptors 1
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_____ 6. On a neuron, the ____________________ is/are the main information receiver(s) of the neuron, while the ____________________ is/are the main information sender(s) of the neuron. a. axon ; dendrites b. neurotransmitter receptors ; dendrites c. dendrites ; axon d. golgi apparatus ; axon _____ 7. In the peripheral nervous system (axons outside of the brain and spinal cord), the _______________ create the myelin sheath wrapped around most axons. a. Microglia b. Radial glia c. Oligodendrocytes d. Schwann cells _____ 8. Which of the following is NOT a function of astrocytes? . a. Synchronize neural activity b. Form the myelin sheath in the central nervous system c. Remove certain waste material, such as used up neurotransmitters, from the extra-cellular space d. Helps in maintaining the blood-brain barrier. _____ 9. At resting potential, the inside of the cell is relatively negatively charged compared to its external environment mainly because: a. there is a significantly larger proportion of negatively charged ions inside of the cell compared to the outside of the cell. b. there is a significantly larger proportion of positively charged ions outside of the cell compared to the inside of the cell. c.
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This note was uploaded on 01/19/2010 for the course PSYC 372 taught by Professor Ehlinger during the Fall '09 term at George Mason.

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Exam 1 answers - NAME: _ PSYC 372 005 Fall 2009: EXAM I (A)...

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