REVIEW & REHEARSE 23 NERVOUS and MOTOR SYSTEMS

!ques1! <i>Check Your Knowledge</i>

Question 23.20

Animal nervous systems have several principal features, which include all of the following except:

  • a) they coordinate the organism’s long-term growth and development.
  • b) they receive input from the world around the organism.
  • c) they initiate responses to the information they receive from the world, when necessary.
  • d) they process the information from the world that an organism receives.
  • e) All of the above are principal features of animal nervous systems.

Question 23.21

Which of the following statements about plants and nervous systems is correct?

  • a) Plants can feel pain in their trunks and stems, where they have neurons, but not in their leaves.
  • b) Plants can feel pain in their leaves, where they have neurons, but not in their trunks or stems.
  • c) Plants can feel pain because they have a nervous system that extends throughout their tissues.
  • d) Plants can feel pain in their trunks, where they have neurons, but not in their stems or leaves.
  • e) Plants cannot feel pain, because they do not have nervous systems.

Question 23.22

What is the difference between a nerve and a neuron?

  • a) A nerve is a bundle of neurons, whereas a neuron is a single cell.
  • b) Nerves have synapses with muscle cells, whereas neurons have synapses with other neurons.
  • c) Nerves have dendrites that can be modified into sensory cells, whereas neurons do not have dendrites.
  • d) “Nerve” is the name given to nervous system cells specialized for receiving and transmitting information, whereas “neuron” describes a nerve cell in humans.
  • e) There is no difference. They are different words for the same structure.