A new drug is developed that prevents the demyelination occurring in the progress of multiple sclerosis. The drug protects the cells responsible for the synthesis and maintenance of myelin in the central nervous system. These cells are most likely which of the following? (A) Astrocyte (B) Ependymal cell (C) Microglial cell Oligodendrocyte (E) Schwann cell

5) cranial nerve II, the optic nerve sends nerve impulses to the brain carrying information about the things we see. These nerve fibers most likely belong to which division of the nervous system? a) sympathetic division b) sensory(afterent) division  c) parasympathetic division d)somatic nervous system

20) which of the following is not a part of the central nervous system, exclusively? a) cerebellum b) medulla oblongata c) cranial nerves d) spinal cord

fill in the blank.......... is a reflection of the unequal distribution of positive and negative ions across the plasma membrane of the axons (axolemma)

1. If you block calcium channels on an axon, which will not occur? A) exocytosis of neurotransmitter B) repolarization phase of the action potential C) depolarization phase of the action potential D) hyperpolarization phase of the action potential E) graded potential

What division of the nervous system drives increased contraction of the muscle of the urinary bladder? A) somatic motor B) special sensory C) parasympathetic D) somatic sensory

a) what letter represents dorsal white column b) what letter represents structure that carrys motor impulses from CNS to skeletal muscles? c) What letter represents structure that houses cell bodies of general somatic afferent neurons?

Chronic neuroinflammation may lead to cognitive impairment as a result of:  a.) synaptic destabilization  b.) reduced adult neurogenisis  c.) nerve fiber demyelination  d.) neuronal cell death e.) all the above

Fill in the descriptions for the following terms as they relate to the PNS or CNS neural tissue: Tract: Bundles of                             [ Select ]                          ["axons", "cell bodies"]            in the                             [ Select ]                          ["CNS", "PNS"]            Nerve: Bundles of                             [ Select ]                          ["axons", "cell bodies"]            in the                             [ Select ]                          ["CNS", "PNS"]            Ganglion: Bundles of                             [ Select ]                          ["axons", "cell bodies"]            in the                             [ Select ]                          ["CNS", "PNS"]            Nucleus: Bundles of                             [ Select ]                          ["axons", "cell bodies"]            in the                             [ Select ]                          ["CNS", "PNS"]

6) which of the following types of nerve cells would be structurally classified as bipolar? a) purkinge cell b) retinal cell c) dorsal root ganglion cells d) pyramidal cell