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Homework answers / question archive / Texas A&M University PSYC 107 Chapter 3 Quiz 1)Glia cells support neurons

Texas A&M University PSYC 107 Chapter 3 Quiz 1)Glia cells support neurons


Texas A&M University

PSYC 107

Chapter 3 Quiz

1)Glia cells support neurons.

  1. Dopamine is a neurotransmitter.
  2. Communication between neurons is by the axon.
  3. The strength of an action potential stays the same.
  4. The size and shape of neurons can vary.
  5. During an action potential, which ions cross the axon membrane, and in which direction?
  6. Which part of a neuron releases neurotransmitters into the synapse?
  7. The                                   is a single, long, thin, straight fiber with branches near its tip. Some are covered with                                  , an insulating sheath that speeds up the transmission of impulses.
  8. What was Otto Loewi’s evidence that neurons communicate by releasing chemicals?
  9. You would feel a pinch on your shoulder (very slightly) sooner than a toe pinch. Why?
  10. The part of a neuron receiving messages is the                                                     . The part sending messages is the                                                              
  11. A single neuron can have many
  12. After neurotransmitter molecules detach from their receptor, some of them diffuse away. What happens to the others?
  13. What is a neurotransmitter?


  1. What is the relationship between neurotransmitters and their receptors?
  2. A mouse, a dog, and a giraffe get toe pinches at the same time. Which responds fastest?
  3. The three parts of a neuron are the cell body, the                                                                          , and the               .
  4. If a drug prevents the inhibitory neurotransmitter GABA from attaching to its receptors, what happens to the postsynaptic cell?
  5. Parkinson's disease results from a deficiency in which neurotransmitter?
  6. Suppose your finger touches something. WHEN do you get the sensation?
  7. In what way do synaptic messages differ from the way computers store information?
  8. The all-or-none law applies to
  9. In comparison to other body cells, what is distinctive about neurons?
  10. One of the main symptoms of Parkinson's disease is
  11. How does L-DOPA affect someone with Parkinson’s disease?
  12. Which of the following is a widely used treatment for Parkinson's disease?
  13. What is the long fiber that conducts impulses from a neuron’s cell body toward another cell?


  1. Which of the following is caused by a loss of dopamine in the brain?
  2. If a drug prevents sodium from crossing an axon membrane, what happens?
  3. When an axon membrane is at rest, the inside has what kind of charge, relative to the outside?
  4. The nervous system is made up of two types of cells called

                              and                                   .

  1. What happens to the strength of an action potential as it travels along an axon?
  2. What happens at a synapse?
  3. What is the advantage of an action potential over electrical conduction in the nervous system?
  4. Which of the following is true of an action potential?
  5. The CNS is the brain and spinal cord.
  6. There is no way to measure brain activity.
  7. Axons travel throughout the brain.
  8. Gray matter refers to the cortex.
  9. The cortex is the inner structure of the brain.
  10. Which brain area is most important for hearing, the ability to recognize complex patterns (such as faces), language comprehension, and emotion?
  11. Someone who has control of speech in the left hemisphere and whose corpus callosum has been split can describe what he or she sees if and only if it is seen


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