Introduction to Nervous Tissue quiz #1 Flashcards
Introduction to Nervous Tissue quiz #1
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What is the function of the myelin sheath?
The myelin sheath insulates axons to increase the speed of electrical impulse conduction. Which types of glial cells are found in the central nervous system?
The types of glial cells found in the central nervous system include astrocytes, oligodendrocytes, microglia, and ependymal cells. The neuron cell is part of what body system?
The neuron cell is part of the nervous system. What type of conduction takes place in unmyelinated axons?
In unmyelinated axons, continuous conduction takes place. Which of the following is not a type of neuron? A) Sensory neuron B) Motor neuron C) Interneuron D) Astrocyte
D) Astrocyte Where are unmyelinated axons found?
Unmyelinated axons are found in both the central and peripheral nervous systems. What is the purpose of the myelin sheath?
The purpose of the myelin sheath is to insulate axons and increase the speed of nerve impulse transmission. Which type of glial cell produces the myelin sheath in the PNS?
Schwann cells produce the myelin sheath in the peripheral nervous system (PNS). Which is the correct description for motor neurons?
Motor neurons carry signals from the central nervous system to muscles and glands. Afferent neurons are what type of neurons?
Afferent neurons are sensory neurons that carry information towards the central nervous system. What type of neuron carries impulses from all parts of the body to the central nervous system?
Sensory neurons carry impulses from all parts of the body to the central nervous system. Which of the neuroglial cell types shown form myelin sheaths within the CNS?
Oligodendrocytes form myelin sheaths within the central nervous system (CNS). What is the function of nervous tissue?
The function of nervous tissue is to generate and carry electrical impulses throughout the body. Which neuroglial cells insulate axons in the central nervous system?
Oligodendrocytes insulate axons in the central nervous system. How do the DNA and genes in a muscle cell compare to the DNA and genes in a nerve cell?
The DNA and genes in a muscle cell are the same as those in a nerve cell, but they express different genes to perform their specific functions. What occurs at the nodes of an axon?
At the nodes of an axon, action potentials are regenerated, allowing for rapid signal transmission along myelinated axons. Which term describes all neurons that carry signals towards the CNS?
Afferent neurons describe all neurons that carry signals towards the central nervous system. Which type of neuron carries information from the CNS to the body?
Efferent neurons, or motor neurons, carry information from the central nervous system to the body. Which of the following are made of gray matter? A) Myelinated axons B) Neuron cell bodies C) Dendrites D) Glial cells
B) Neuron cell bodies and C) Dendrites Which type of nerve are motor neurons?
Motor neurons are efferent nerves. Which of the following is not a function of the nervous system? A) Sensory input B) Integration C) Motor output D) Hormone secretion
D) Hormone secretion Which of the following is not a characteristic of nervous tissue? A) Conducts electrical impulses B) Supports and protects neurons C) Stores energy D) Insulates axons
C) Stores energy Which receive information from the axon terminals of the neuron? Select three options. A) Dendrites B) Axon hillock C) Synaptic cleft D) Postsynaptic membrane
A) Dendrites, C) Synaptic cleft, D) Postsynaptic membrane Which of the following is a type of glial cell found in the peripheral nervous system? A) Astrocytes B) Schwann cells C) Oligodendrocytes D) Microglia
B) Schwann cells What is the structure within a nerve that surrounds individual axons?
The endoneurium is the structure within a nerve that surrounds individual axons. In what way is the DNA of a nerve cell different from the DNA of a muscle cell?
The DNA of a nerve cell is not different from the DNA of a muscle cell; they have the same DNA but express different genes. Which of the following is not a function of dendrites? A) Receive signals B) Transmit signals to the cell body C) Generate action potentials D) Increase surface area for synaptic connections
C) Generate action potentials Which of the following is true of axons? A) They receive signals B) They transmit signals away from the cell body C) They contain the nucleus D) They are always myelinated
B) They transmit signals away from the cell body Which of the following neurons is classified as a unipolar neuron? A) Sensory neuron B) Motor neuron C) Interneuron D) Astrocyte
A) Sensory neuron Which cells protect the neurons and help them function?
Neuroglia, or glial cells, protect the neurons and help them function. What part of the nervous system sends signals to the muscles that are voluntarily controlled?
The somatic nervous system sends signals to the muscles that are voluntarily controlled. Where are the neuron cell bodies located?
Neuron cell bodies are located in the gray matter of the brain and spinal cord, and in ganglia of the peripheral nervous system. Which types of cells are supporting cells of the peripheral nervous system?
Schwann cells and satellite cells are supporting cells of the peripheral nervous system. Most nerves are what type of nerve?
Most nerves are mixed nerves, containing both sensory and motor fibers. What cells form the myelin sheaths around nerve fibers in the PNS?
Schwann cells form the myelin sheaths around nerve fibers in the peripheral nervous system (PNS). Which cell type is not found in the peripheral nervous system? A) Schwann cells B) Satellite cells C) Oligodendrocytes D) Neurons
C) Oligodendrocytes Which of the following are the three basic types of neurons? A) Sensory, motor, interneurons B) Astrocytes, oligodendrocytes, microglia C) Afferent, efferent, interneurons D) Unipolar, bipolar, multipolar
A) Sensory, motor, interneurons Which of the following is a characteristic of an axon? A) Contains the nucleus B) Transmits signals away from the cell body C) Receives signals D) Is always myelinated
B) Transmits signals away from the cell body What wraps around and insulates the axons of neurons?
The myelin sheath wraps around and insulates the axons of neurons. Which kind of tissue transmits signals across a synapse?
Nervous tissue transmits signals across a synapse.
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