Chat with AIExam 18: Nervous System Cells
Oligodendrocytes are found only around dendrites of neurons of the CNS.
(31) 
VerifiedFalse
What type of neuron is always a sensory receptor?
(34) 
Answered by Examlex AI CopilotA type of neuron that is always a sensory receptor is known as a sensory or afferent neuron. These neurons are specialized to detect changes in the environment, such as light, sound, touch, temperature, and chemical signals, and to transmit information about these changes to the central nervous system (CNS). Sensory neurons convert external stimuli into electrical impulses through a process called transduction, and these impulses are then conveyed to the brain or spinal cord where they are processed and interpreted.
Sensory neurons have unique structures that are adapted to their specific function of receiving sensory input. For example, photoreceptor cells in the retina of the eye are sensitive to light, while mechanoreceptors in the skin respond to mechanical pressure or distortion. Each sensory neuron is designed to respond to a particular type of sensory input, and they are an essential component of the sensory systems that allow organisms to perceive and interact with their environment.
Match each term with its definition or description.
-Bundles of intermediate filaments in the neuron
(37) VerifiedF
Which of the following is the deepest connective tissue layer of a nerve?
(34) Bipolar and multipolar are examples of the structural classification of neurons.
(30) Regeneration of nerve fibers will take place only if the cell body is intact and the fibers have:
(29) Most injuries to the brain and spinal cord cause permanent damage.
(27) The efferent pathways of the autonomic nervous system consist of the ________ nervous systems.
(28) A lack of which neurotransmitter is associated with Parkinson's disease?
(35) Match each part of the nervous system with its corresponding description.
-PNS subdivision that transmits incoming information from the sensory organs to the CNS
(29) If a motor neuron is damaged, it can cause the muscle it innervates to atrophy because of lack of stimulation.
(32) The nervous system is designed to detect stimuli from both the internal and external environment.
(32) Match each of the following cell types with its corresponding description.
-Has the capability of phagocytosis
(39) In a contralateral reflex arc, the receptors and effectors are located on opposite sides of the body.
(39) Small, distinct regions of gray matter within the CNS are called nuclei.
(44) 
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