Stretching of the bladder reflexively causes all of the following EXCEPT
A) micturition.
B) excitation of parasympathetic neurons, causing the detrusor muscles to contract.
C) inhibition of somatic neurons to the external urethral sphincter, causing the sphincter to open.
D) excitation of sympathetic neurons, causing the internal urethral sphincter to relax.
E) opening of the urethral sphincters.
Answer: D) excitation of sympathetic neurons, causing the internal urethral sphincter to relax.
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Also known as Lou Gehrig's disease, ____ is a progressive, degenerative disease of the motor neurons
a. myasthenia gravis b. muscular dystrophy c. amyotrophic lateral sclerosis d. tetanus
The most active phagocytic cells in circulating blood are
A. neutrophils and macrophages. B. neutrophils and monocytes. C. lymphocytes and monocytes. D. monocytes and macrophages.
Conscious awareness of incoming sensory information is called
A. sensation. B. receptor. C. a stimulus. D. adaptation. E. transducer.
The area of the brain that locates the pain is the.
A) hypothalamus. B) thalamus. C) limbic system. D) somatosensory cortex.