leakage channel d) ligand-gated channel 4. An impulse from one nerve cell is communicated to another nerve cell via the __________. a) cell body b) synapse c) receptor d) effector e) 5. The substance released at axon terminals to propagate a nervous impulse is called a(n) ___________. a) ion b) cholinesterase c) neurotransmitter d) biogenic amine 6. What area of a nerve cell carries impulses towards the nerve cell body? a) dendrite b) neurolemma c) axon d) nucleus 7
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characterized by gradual degeneration of nerves‚ which starts in the hands and feet and results in numbness‚ muscle weakness and loss of function. Charcot-Marie-Tooth (CMT) disease typically occurs in 1 person per 2‚500. The disease is not fatal ‚ however ‚ the effects that it causes on the body is very detrimental ‚ especially to the individual ’s self-confidence. The disease involves damage to the covering myelin sheath around nerve fibers. In some‚ the disease causes destruction
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The other complex compartmentalized nervous system is found in arthropods (see the diagram). The arthropodan brain consists of three main regions: the protocerebrum‚deutocerebrum‚ and tritocerebrum. The anterior protocerebrum‚ which receives the nerves of the eyes and other organs‚ contains centres‚ or neuropils‚ such as the optic centres and bodies known as corpora pedunculata. The neuropils function as integrative systems for the anterior sense organs‚ especially the eyes‚ and in control of movement;
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outskirts material system is incorporated nerves along these lines. The substantial structure with everything taken into account is responsible for all parts of an individual’s orderly life‚ going from breathing and blazing to helping one to hold certifications in a test. Nerves interface the cerebrum with the face‚ eyes‚ ears‚ nose‚ and spinal rope‚ from where they relationship with whatever is left of the body. Considerable nerves is the party of nerves in charge of get-together
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illness of varying duration of several months to years. Half of patients may have different cranial nerves involvement. In Europe‚ about a third of patients with GBS are mildly affected and they keep on walking with mild difficulty.3 Combination of rapidly progressive weakness in legs and arms‚ areflexia/hyporeflexia and protein cell
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The Structure of Inner Ear The inner ear is the essential part of the organ of hearing‚ receiving the ultimate distribution of the auditory nerve. It also called the labyrinth. Inner ear consists of two parts: the osseous labyrinth‚ a series of cavities within the petrous part of the temporal bone‚ and the membranous labyrinth‚ a series of communicating membranous sacs and ducts‚ contained within the bony cavities. The osseous (or bony) labyrinth: Bony labyrinth is the rigid outer wall of
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The nervous system consists of the brain‚ spinal cord‚ and a complex network of neurons. This system is responsible for sending‚ receiving‚ and interpreting information from all parts of the body. The nervous system monitors and coordinates internal organ function and responds to changes in the external environment. This system can be divided into two parts: the central nervous system and the peripheral nervous system. Let ’s take a look at the central nervous system. Central Nervous System The
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| Deficiency | In Abundance | Vitamin A | Liver ‚cod liver oil‚ carrots‚ spinach‚ sweet potatoes‚ peaches and cantaloupe. | * Growth and maintenance of epithelial tissue including the cornea‚ membranes of gastrointestinal tract and skin. * Nerve formation and function | Fat Soluble | In children‚ growth retardation‚ and impaired bone formation. Fetal malformations. | Fetal malformations | Vitamin B2 | Beef‚ liver‚ lean meat‚ kidney‚ non-fat milk‚ oysters‚ dark green leafy vegetables‚ |
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consists of the brain‚ spinal cord‚ nerves‚ ganglia‚ and parts of the receptor and effector organs. Your nervous system is composed of the central nervous system‚ the cranial nerves‚ and the peripheral nerves. The brain and spinal cord together form the central nervous system. The cranial nerves connect the brain to the head. The four groups of nerves that branch from the cervical‚ thoracic‚ lumbar‚ and sacral regions of the spinal cord are called the peripheral nerves. The peripheral nervous system
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mechanoreceptors found in the ears. Oooh‚ that smell: Olfaction Olfactory cells line the top of your nasal cavity. On one end‚ olfactory cells have cilia — hair-like attachments — that project into the nasal cavity. On the other end of the cell‚ are olfactory nerve fibers‚ which pass through the ethmoid bone and into the olfactory bulb. The olfactory bulb is directly attached to the cerebral cortex of your brain. As you breathe‚ anything that is in the air that you take in enters your nasal cavity: hydrogen
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