Download Nerve Cells and Nerve Impulses Quiz Answers

Nerve Cells and Nerve Impulses Quiz Answers
1. True or False: A dendrite is the long, threadlike part of a neuron that
transmits nerve impulses to other cells.
false 2. True or False: Neurotransmitters are the electrical signals carried by
nerve cells.
false 3. A nerve cell that carries messages is called a __________.
neuron 4. What is a nerve impulse?
A nerve impulse is the electrical signal transmitted by the nervous system. 5. What is the myelin sheath and what is its role?
The myelin sheath is a fatty layer that insulates the axon and allows the electrical signal to travel much more quickly. 6. Which part of the nerve cell passes the signal onto other cells?
a) the cell body
b) the dendrite
c) the axon
d) the node of Ranvier
7. Which neurons carry nerve impulses from the central nervous system
to organs, glands, and muscles?
a) sensory neurons
b) muscle neurons
c) action neurons
d) motor neurons
8. Which best describes a neuron?
a) one dendrite and many axons covered with a myelin sheath interrupted by
nodes of Ranvier
b) many dendrites and one axon covered with a myelin sheath interrupted by
nodes of Ranvier
c) many dendrites and one axon covered with a myelin sheath interrupted by
the synapse
d) one dendrite and many axons covered with a myelin sheath interrupted by
the synapse
9. What is unique about the synaptic space?
a) The two cells are attached by a gap junction.
b) There is actually a gap between the two cells.
c) The two cells are held together very tightly.
d) The two cells have fused cell membranes.
10. Depression is caused by low levels of
a) neurons in the brain.
b) synapses in the brain.
c) neurotransmitters in the brain.
d) all of the above