Give a brief synopsis of CNS control of movement.
What will be an ideal response?
Motor output consists of somatic control of skeletal muscle. Simple somatic reflexes are controlled by centers in the brain and spinal cord. Voluntary control of skeletal muscle involves primary motor cortex and motor association areas, sensory areas, basal nuclei, and cerebellum.
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Given that impulses from parasympathetic nerves decrease heart rate, and that the neurotransmitter for parasympathetic postganglionic fibers is acetylcholine (ACh), predict how the following chemicals might affect heart rate
A) Pilocarpine, a drug that simulates the action of ACh, will increase heart rate; and atropine, a drug that blocks the action of ACh, will decrease heart rate. B) Pilocarpine, a drug that simulates the action of ACh, will decrease heart rate. C) Atropine, a drug that blocks the action of ACh, will decrease heart rate. D) Pilocarpine, a drug that simulates the action of ACh, will increase heart rate.
Receptors of the ________ senses receive the signal of nausea
A) Labyrinthitis B) Cutaneous C) Accommodation D) Visceral
Which of the following symptoms is common following damage to the cerebellum?
A. flaccid paralysis B. violent, uncontrolled body movements called chorea C. intention tremors D. resting tremors E. spastic paralysis
Epinephrine and norepinephrine exert identical effects in all tissues
Indicate whether the statement is true or false