Thyroids

KEY TERMS Key Terms and Concepts The Control of Movement 1.

Muscles and their doings Categories of muscle Smooth Skeletal or striated Cardiac Precise movements: few muscle fibers innervated by each axon Neuromuscular junction Acetylcholine Muscle contractiveness Antagonistic muscles Flexor Extensor Myasthenia gravis Autoimmune attack on acetylcholine receptors at neuromuscular junctions Progressive betray and fast fatigue Depletion of acetylcholine after several(prenominal) action potentials in rapid succession Treatment Drugs that bottle up immune system Drugs that inhibit acetylcholinesterase (enzyme that breaks implement acetylcholine) Prolongs action of acetylcholine Fast and softened muscles Fish Red, slow, patient of to fatigue Pink, intermediate speed, moderately resistant to fatigue White, fast, forceful, fatigue quickly Birds: discolour and mordant muscles Humans and other mammals: mixed fibers in each muscle Fast-twitch fibers Slow-twitch fibers Muscle escort by proprioceptors Stretch reflex Muscle spindle Stretch receptor parallel to muscle Causes muscle to contract: decreases stretch Golgi heftiness organ In tendons at opposite ends of muscle Inhibits muscle: bracken against too prompt contraction Location of eubstance parts Units of movement Voluntary and in unpaid movements Reflexes: agreeable automatic responses to stimuli In uncoerced Many behaviors: mixture of voluntary and involuntary influences Movements with dissimilar esthesia to feedback Ballistic movement: executed as a whole; cannot be adapted after initiated High sensitivity to feedback Threading needle Singing Delayed auditive feedback Infant reflexes Grasp reflex Babinski reflex Rooting reflex Cerebral cortex damage in adults à infant reflexes released from inhibition Allied reflexes: several reflexes enkindle to exacther Sequences of behaviors Central pattern generators Rhythmic movements Frequency of repetition: governed by spinal cord Motor plan: resolute sequence of movements Learned or make in Birds: wing cite when dropped Humans: yawning Categories of movement Spinal repel neuron: final crude path Many brain areas make different patterns Brain Mechanisms of Movement 1. The role of the cerebral cortex Primary labour cortex:... If you hope to get a full essay, rove it on our website: Ordercustompaper.com

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