Under normal conditions a nerve impulse is initiated by an appropriate stimulus called:

Related Mcqs:

1. The neuron conducts the impulse in the form of nerve impulse during:

   A. Threshold potential
   B. Active membrane potential
   C. Resting membrane potential
   D. All of the above

2. Which THREE of the following are true regarding habituation and dishabituation?
   1:Habituation involves a gradual reduction in the magnitude of the response to repeated presentation of the response of a stimulus
   2:In dishabituation, the response returns when a salient extraneous stimulus is presented just before a trial with the habituated stimulus
   3:Habituation is caused by sensory-motor fatigue
   4:Habituation occurs as a consequence of the repeated presentation of a single event

   A. 1,2 & 3
   B. 2,3 & 4
   C. 1,2 & 4
   D. 4

3. A neural impulse is initiated when neuron’s charge momentarily becomes less negative or even positive. This event is called:

   A. an action potential
   B. a resting potential
   C. impulse facilitation
   D. inhibitory

4. The conduction of a nerve impulse down the axon is called a (n):

   A. ion potential
   B. action potential
   C. resting discharge
   D. synapse

5. A membrane potential of_________volts exits when a neuron is not conducting a nerve impulse:

   A. 0.05
   B. 0.07
   C. 0.05 to 0.07
   D. 1

6. The passage of nerve impulse is associated with increase in permeability of which of the following ion:

   A. Sodium
   B. Potassium
   C. Organic ions
   D. Inorganic ions

7. A physical stimulus is converted into a neural impulse by a process ____________?

   A. transposition
   B. transduction
   C. transition
   D. transference

8. The ability to distinguish between a conditioned stimulus and similar stimuli that do not signal an unconditioned stimulus is called __________________?

   A. shaping
   B. acquisition
   C. discrimination
   D. generalization

9. The idea that the amount of change in a stimulus necessary to produce a JND is a constant proportion of the stimulus intensity is called:

   A. James law
   B. The all-or-none principle
   C. The law of diminishing returns
   D. Weber’s law

10. The nature of a nerve impulse is primarily a/an _____________ event; communication between neurons is primarily a/an_____________

    A. chemical; electrical
    B. acetylcholine, catecholamine
    C. dendrite; axon
    D. electrical; chemical