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BIO 117
Chapter 10
Question | Answer |
---|---|
what are the main divisions of the nervous systems | 1) The central nervous system 2) The Peripheral nervous system |
What do the divisions of the nervous system consist of | 1) (CNS) Brain and spinal cord 2) (PNS) the nerves that connect to the rest of the body |
What are the two cell types that build up the nervous tissue | 1) Neuroglia 2) Neurons |
Which cell type is capable of processing and conducting the electrical signals | Neurons |
Which cell type have supportive, protective, nourishing and insulating functions | Neuroglia |
What are the three major parts of a neuron | 1)Dendrites 2)Cell Body 3)Axons |
What is the function of the myelin sheet | It protects and insulate the axon |
Are dendrites covered with myelin sheath | No |
Are axons covered in myelin sheath | Yes |
What are axon terminals | Storage for chemical neurotransmitters |
What are the three main types of neurons | 1) Sensory neurons 2) motor neurons 3) interneurons |
Sensory Neuron or Afferent neurons | carries information from the periphery toward the CNS |
Motor neurons or efferent neurons | carries information from the CNS to the periphery |
Interneurons | found only in the CNS: form connections between sensory and motor neurons |
What are the structures called in the CNS and PNS that consists of grey matter | unmyelinated axons, cell bodies, interneurons, and synapses |