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10 Cards in this Set
- Front
- Back
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The brain is one of the largest organs in the body. It weighs __ lbs in an adult.
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3
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The adult brain is made up of about __ neurons.
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one hundred billion
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(T or F) The brain functions in sensations, memory, emotions, decision making, and behavior.
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True
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The __ is protected by bone, meninges, and cerebrospinal fluid.
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brain
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The brain is supplied with blood from the __ which is located at the base of the brain.
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circle of Willis
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The brain represents only __ of the weight of the body, but the brain uses about __ of the oxygen and glucose that our bodies need.
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2% ; 20%
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Oxygen deprivation for __ minutes results in permanent injury.
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4
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The __ protects the brain cells from harmful substances and pathogens by preventing passage of many substances from the blood into brain tissue.
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blood-brain barrier (BBB)
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__ junctions seal together the endothelial cells of the brain capillaries, which are also surrounded by a continuous basement membrane.
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Tight
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The BBB is also surrounded by __ which allow some substances to pass through but not others. Proteins and antibiotics cannot pass, but alcohol and anesthetics do pass.
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astrocytes
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