8 In vertebrates, axons are insulaled by myelin sheaths, causing action potentia
ID: 134286 • Letter: 8
Question
8 In vertebrates, axons are insulaled by myelin sheaths, causing action potentials to a. jump from neuron to neuron b.slow down for regulation e. increase in speed by salutatory conduction c. d.interact with glial cells The simplest animal nervous sysiem is clled a neuronal pool b.nerve net e. medulla Record your d. nerve net 10 Your brain and spinal cord are part of which nervous system? a. somatic nervous system b.peripheral nervous system c. central nervous system d.autonomic nervous system 1. Name t I1 Which autonomic nervous system would likely be activated if the student learned that an exam she had forgotten about would start in 5 minutes? a. the central nervous division b. the parasympathetic division c. the enteric division d. the sympathetic division 2. D 12 Which brain region is incorrectly paired with one of its functions? a. thalamus- motor activities b. hypothalamus homeostasis c. medulla oblongata - blood pressure d. frontal lobe reasoning 13 Which type of cell transmits signals to the central nervous system? a. interneurons b.efferent neurons c. afferent neurons d.motor neurons 14 Which of the following sensory receptors is incorrectly paired with its category? a. taste buds - chemoreceptor b. nociceptor - pain receptor c. muscle spindle - mechanoreceptor d. olfactory receptor-mechanoreceptorExplanation / Answer
Answer
8]In vertebrates ,axons are insulated by myelin sheaths,carrying action potentials to
c]Increase in speed by saltatory conduction
Explaination -The myelination enables an especially rapid mode of electrical impulse propagation called saltatory conduction.
The main purpose of myelin sheath is to increase the speed at which impulses propagate along the myelinated fiber.
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9] The simplest animal nervous system is called
b]nerve net
Explaination- nerve net is the simplest form of nervous system found in multicellular organism.
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10] Your brain and spinal cord are part of which nervous system
c]Central nervous system
Explaination-central nervous system is a type of nervous system consists of brain and spinal cord.
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