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WorksheetsThe Nervous System Part I
Total questions: 10
Worksheet time: 5mins
Which of these is not a function of the nervous system?
sensory input
motor innervation to muscles or glands
integration of motor information
secreting hormones into the bloodstream to affect far-away organs
integration of sensory information
Which of the following is not a characteristic of neurons?
Longevity
Inability to divide
High metabolic rate
Ability to divide and proliferate
Connects and communicates
This region of a neuron is characterized by numerous, short cytoplasmic extensions and is often referred to as receiving regions.
synapse
axon terminal
axon
cell body
dendrite
This is the site of communication between neurons.
synapse
axon terminal
axon
cell body
dendrite
Most synapses transmit communicating signals using
chemical signaling molecules-neurotransmitters.
electrical impulses traveling through gap junctions.
physical contact between adjacent neurons.
chemical signaling molecules released from neuroglia.
Astrocytes perform all of the following functions except
regulating levels of neurotransmitters around the neurons
controlling ion levels in the environment around neurons
help with synapse formation in the developing nervous system
produce cerebrospinal fluid
Most tumors in the brain originate from glial cells, but not neurons. What characteristic of glial cells make them the most likely source of tumors in the brain?
Glial cells are able to divide, while neurons are not.
Glial cells while not able to divide will naturally release a tumor-promoting factor.
Glial cells carry a neuronal signal, making them unable to proliferate and divide.
Glial cells are easily damaged by the electrical signal carried on the neurons.
Glial cells are more prone to be cancerous because they’re by far outnumbered when compared to neurons.
Which cells provide the myelin sheath for neurons in the CNS?
Schwann cells
astrocytes
microglial cells
oligodendrocytes
cardiac cells
Myelin on axons functions to
make the axons live longer.
store nutrients (fat) for use by the neurons.
cover nodes of Ranvier.
speed the rate of impulse conduction and insulate neighboring axons from one another.
provide protection against pathogens
White matter represents
aggregations of neuron cell bodies in the brain.
aggregations of neuron cell bodies in the spinal cord.
myelinated axons traveling together in the CNS.
dendrites traveling together in the ANS.
proteins sticking together with carbohydrates
