HUMAN ANATOMY &PHYSIOLOGY >BI<
15th Edition
ISBN: 9781260664379
Author: SHIER
Publisher: MCG CUSTOM
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Chapter 10, Problem 3IA
How would you explain the following observations?
a. When motor nerve fibers in the leg are severed, the muscles they innervate become paralyzed; however, in time, control over the muscles often returns.
b. When motor nerve fibers in the spinal cord are severed, the muscles they control become permanently paralyzed.
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Explain why a spinal cord injury in the neck completely paralyzes the skeletal muscles of the limbs, whereas the cardiac muscle of the heart still beats rhythmically
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All of the following are true concerning reflex arcs EXCEPT
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B.they are used to prevent harm
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D.they only use the PNS and not the CNS
Chapter 10 Solutions
HUMAN ANATOMY &PHYSIOLOGY >BI<
Ch. 10 - Prob. 1PCh. 10 - Name two groups of nervous system organs.Ch. 10 - Prob. 3PCh. 10 - Prob. 4PCh. 10 - Prob. 5PCh. 10 - 6 Describe the types of neurons based on...Ch. 10 - Prob. 7PCh. 10 - 8 Name and describe four types of neuroglia.
Ch. 10 - What are some functions of neuroglia?Ch. 10 - Prob. 10P
Ch. 10 - Prob. 11PCh. 10 - Prob. 12PCh. 10 - Prob. 13PCh. 10 - Prob. 14PCh. 10 - Prob. 15PCh. 10 - 16 Explain how impulse conduction differs in...Ch. 10 - Prob. 17PCh. 10 - Prob. 18PCh. 10 - Prob. 19PCh. 10 - Prob. 20PCh. 10 - What is a neuronal pool?Ch. 10 - Define facilitation.Ch. 10 - Prob. 23PCh. 10 - What is divergence?Ch. 10 - Prob. 1CACh. 10 - Prob. 2CACh. 10 - Prob. 3CACh. 10 - Prob. 4CACh. 10 - Prob. 5CACh. 10 - Prob. 6CACh. 10 - Prob. 7CACh. 10 - Prob. 8CACh. 10 - Prob. 9CACh. 10 - Prob. 10CACh. 10 - Prob. 11CACh. 10 - Prob. 12CACh. 10 - Prob. 13CACh. 10 - Prob. 14CACh. 10 - Prob. 15CACh. 10 - 16 Explain how malfunctioning neuroglia can harm...Ch. 10 - Prob. 17CACh. 10 - Prob. 18CACh. 10 - Prob. 19CACh. 10 - Explain how information is passed from a...Ch. 10 - Prob. 21CACh. 10 - Prob. 22CACh. 10 - Distinguish among polarized, hyperpolarized, and...Ch. 10 - Prob. 24CACh. 10 - Prob. 25CACh. 10 - Prob. 26CACh. 10 - Prob. 27CACh. 10 - Prob. 28CACh. 10 - Prob. 29CACh. 10 - Explain how enzymes within synaptic clefts and...Ch. 10 - Prob. 31CACh. 10 - Prob. 32CACh. 10 - Prob. 33CACh. 10 - Why are rapidly growing cancers that originate in...Ch. 10 - In Tay-Sachs disease, an infant rapidly loses...Ch. 10 - How would you explain the following observations?...Ch. 10 - Prob. 4IACh. 10 - Prob. 5IA
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, biology and related others by exploring similar questions and additional content below.Similar questions
- A friend who works in a research lab is conducting an experiment to study motor movement. First the animal undergoes spinal transection at T5. Then, the animal is trained to walk on a treadmill while supported. Finally, GABA antagonists are injected into the lumbar enlargement of the spinal cord. After treatment of the drug, what motor response would you expect? Question 5 options: A) The animal no longer has proper functioning of back or front legs while on the treadmill B) The animal no longer has coordinated movement of the front legs while on the treadmill C) The animal no longer has coordinated movement of the back legs while on the treadmill D) The animal can walk normally on the treadmill (with support)arrow_forwardFill in the blankes The somatic motor neurons innervating the __________________ of the lower limbs are located in the _________________ of the spinal cord. A. smooth muscles; lumbar region B. skeletal muscles; cervical region C. skeletal muscles; lumbar region D. skin; cervical regionarrow_forwardWhere is the anterior (ventral) root located in the sequence of structures through which motor impulses pass as they descent from the brain and leve the spinal cord? A. Between anterior (ventral) gray horn and spinal nerve B. Between spinal nerve and posterior (dorsal) root ganglion C. Between anterior (ventral) gray horn and posterior (dorsal) gray horn D. Between white column and posterior (dorsal) gray hornarrow_forward
- 2(2)Answer these questions well detailed in paragraphs and explained please. A) What are the different ways to mesure brain activity? B) What is the purpose of measuring brain activity?arrow_forwardWhich of these events occurs when a person steps on a tack with theright foot?a. The right foot is pulled away from the tack because of the Golgitendon reflex.b. The left leg is extended to support the body because of the stretchreflex.c. The flexor muscles of the right thigh contract, and the extensormuscles of the right thigh relax because of reciprocal innervation.d. Extensor muscles contract in both thighs because of the crossedextensor reflexarrow_forwardWhat do multiple sclerosis and ALS (amyotropic lateral sclerosis) have in common?a. They both are more common in young men than in young women.b. They both impair the initiation of action potentials.c. They both damage the myelin sheath, disrupting action potential transmission.d. They both impair nerve function in the peripheral nervous systemarrow_forward
- List and describe what is happening in each of the 5 steps of a spinal reflex arc. Assume that the reflex arc is polysynaptic.arrow_forwardA patient with heart disease experiences pain at the base of the neck and in the left shoulder and upper limb during exercise. How would you explain the likely origin of this pain to the patient? HINT How does referred pain happen?arrow_forwardAll of the following are functions of the spinal cord except A) mediates quick and involuntary response to a stimuli B) helps maintain posture and equilibrium during locomotion C) receives sensory input and sends motor signals through spinal nerves D) the only control center for parasympathetic nervous systemarrow_forward
- Which of these tracts carries motor signals destined for the postural muscles? a. the gracile fasciculus b. the cuneate fasciculus c. the spinothalamic tract d. the vestibulospinal tract e. the tectospinal tractarrow_forwarda. Describe the characteristics of a spinal cordtract, using an example.b. Differentiate an upper motor neuron from alower motor neuron by location and function.c. Describe a nerve plexus and how it affectsnerve distribution.d. Describe an acquired reflex and include anexample.arrow_forwardThe image below shows a cross section through the spinal cord. Use the diagram to answer the following questions. a. What makes up the grey matter of the spinal cord? Why is this material grey? b. What makes up the white matter of the spinal cord? Why is this material white? c. Describe the functions of the following:i. Dorsal Horn. Ventral Horn. On the diagram, draw the pathway of information travel into and out of the spinal cord during a spinal reflex arc.arrow_forward
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