What happens to the myelin in Multiple Sclerosis? (1 point) --Multiple Sclerosis is causes the demyelination of axons in the spinal cord and brain. This is a result of loss of oligodendrocytes and scarring of white matter in the nervous system. Also‚ demyelination in MS is inflammation caused by an autoimmune response. The inflammation prevents proper recovery and
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disease) d. Basal Ganglia - group of brain structures; for movement (posture) [Parkinson’s disease if involuntary] e. Cerebral Hemispheres - 2 Large structures (Left & Right Hemisphere) [Right: creativity‚ Left: Logic) corpus callosum - bundle of axons whch connects 2 hemispheres Lobes of Cerebral Cortex a. Frontal Lobe - reasoning‚ planning‚ parts of speech‚ movement‚ emotions‚ problem solving b. Parietal Lobe - movement‚ orientation‚ recognition‚ perception to stimuli c. Occipital Lobe
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bulbs (#1) Axons of olfactory neurons project through the cribriform plate (#1) to these structures Where the olfactory nerves synapse with mitral & tufted cells 3. Olfactory vesicles bulbous enlargements of the dendrites of olfactory neurons 4. Olfactory hairs Have chemoreceptors (#5) that bind to odorants‚ resulting in action potential production 5. Basal cells olfactory neurons lost from the olfactory epithelium are replaced by these cells B. 1. Olfactory nerves Formed by axons from the
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Chapter 9: Muscles and Muscle Tissue‚ Lecture Outline: I. Overview of Muscle Tissues (pp. 276–278; Table 9.1) A. Types of Muscle Tissue (p. 277; Table 9.1) 1. Skeletal muscle is associated with the bony skeleton and consists of large cells that bear striations and are under voluntary control. 2. Cardiac muscle occurs only in the heart and consists of small cells that are striated and under involuntary control. 3. Smooth muscle is found in the walls of hollow organs and
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The Secret to Michael Jordan ~B. Harjo~ Freshman Composition 1101 Section 28 "I can accept failure. Everyone fails at something. But I can’t accept not trying." ~Michael Jordan~ (Hook) For many years‚ Michael Jordan was an NBA star‚ averaging 30.4 points per game and winning six NBA championships. Although Michael Jordan became one of the biggest names in basketball history‚ it wasn’t always that way. For many years‚ Michael Jordan couldn’t even play the sport‚ and it seemed like he never
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Human Physiology/Senses ← The Nervous System — Human Physiology — The Muscular System → Senses Are the physiological methods of perception. The senses and their operation‚ classification‚ and theory are overlapping topics studied by a variety of fields. Sense is a faculty by which outside stimuli are perceived. What are Senses? We experience reality through our senses. A sense is a faculty by which outside stimuli are perceived. Many neurologists disagree about how many senses
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potential is generated and propagated throughout the cell * Describe the relative and absolute refractory periods * Explain how myelin increases the action potential conduction velocity * Explain how axon diameter affects the action potential conduction velocity * Explain why axons can regenerate in the peripheral nervous system by not the central nervous system * Explain how local anesthetics work * Explain how myelin contributes to the symptoms of multiple sclerosis * Describe
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shortens or contracts muscle fiber so that it pulls on its attachment. Muscle are stimulated by a chemical reaction called acetylcholine‚ it synthesizes in the cytoplasm of a motor neuron and stored in vesicles at the distal end of the motor neuron axons. Each muscle fiber is packed with myofibrils‚ which is bundles of contractile filaments made up of actin and myosin. A longitudinal view of a myofibril reveals the reason for the striated appearance of skeletal muscle and cardiac muscle. The myofibril
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December 18th‚ 2013 Block 8 Body Tissues Essay There are four major categories of tissues in the human body. Each of them separate into even smaller groups with specific structures and functions. The four major types are epithelial tissue‚ connective tissue‚ muscle tissue and cardiac tissue. They are all necessities of the human body and contribute to many functions our bodies and cells carry out in order to survive. Tissues interact and group together to make up organs which then compose systems
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Anatomy and Physiology Unit Notes Unit 1: Organization of the Human Body Key Terms: Ana - prefix that means up or back again. Physio - a prefix that means natural or physical. Ology - a suffix that means the study of something. Homeo - a prefix that means like or similar. Thoraci -a prefix that means chest. Stasis - a suffix that means the slowing of a bodily fluid. Abdomino - a prefix that means abdomen. Anatomy-the study of structure. Physiology - the study of how a structure functions
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