Describe the location of the basal ganglia and their three primary functions
What will be an ideal response?
The basal nuclei consist of masses of gray matter deep within the cerebral hemispheres. Their functions include: (1) inhibiting muscle tone throughout the body; (2) selecting and maintaining purposeful motor activity, but also suppressing unwanted patterns of movement; and (3) helping monitor and coordinate slow, sustained contractions needed to maintain posture and support.
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Immunotherapy using antibodies blocking the action of VEGF helps treat cancer by
A. providing a target for radiation therapy. B. stimulating natural killer cells to attack cancer cells. C. preventing cancer cells from stimulating growth of new capillaries. D. preventing skin cells from undergoing rapid mitosis.
An increase in which of these would produce an increase in mean arterial pressure?
A. heart rate B. stroke volume C. peripheral resistance D. Any of these would increase mean arterial blood pressure. E. Only heart rate or stroke volume would increase mean arterial blood pressure.
The withdrawal reflex
A) includes the Golgi tendon organs. B) includes the synapse of sensory neurons directly with alpha motor neurons. C) helps to protect the body from painful stimuli. D) is a response to increased tension at a tendon. E) all of the above
Channel protein gates respond to all these stimuli except ________
A) chemical messengers B) physical deformation of the plasma membrane C) changes in electrical potential (voltage) across the plasma membrane D) ligands E) water in the extracellular fluid