1. Which of the following pairings does NOT fit? A. Afferent neurons: sensory ne
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Question
1. Which of the following pairings does NOT fit?
A. Afferent neurons: sensory neurons
B. Multipolar neurons: peripheral nervous system sensory neurons
C. Motor neurons: efferent neurons
D. Association neuron: functional classification
2. On average, the resting membrane potential is -70mV. What does the sign and magnitude of this value tell you?
A. The outside surface of the plasma membrane is much more negatively charged than the inside surface.
B. The inside surface of the plasma membrane is much more positively charged than the outside surface.
C. There is no electrical potential difference between the inside and the outside surfaces of the plasma membrane.
D. The inside surface of the plasma membrane is much more negatively charged than the outside surface.
3. Which description of synapses is NOT correct?
A. Second messengers can activate gene activities in the postsynaptic neuron.
B. Excitatory synapses cause depolarization.
C. Lonotropic receptors are ion channels that open and influence the polarization of the mebrane.
D. Direct signalizing involves the activation of G Proteins.
Explanation / Answer
1. Answer B
Multipolar neuron is a type of neuron with single axon and multiple dendrites. Multipolar neuron constitute the majority of neuron in the central nervous system. Multipolar neuron include motor neuron and interneuron.
Afferent neuron or sensory neuron carry impulses from sensory organ to central nervous system.
Efferent neuron or motor neuron carry information from central nervous system to effector organ.
Functional classification of neuron: Motor neuron, sensory neuron and interneuron (association neuron)
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