An adult patient shows Babinski's sign during a test of plantar reflex. How is Babinski's sign different than the normal response and what does the altered response indicate?
What will be an ideal response
The plantar reflex tests the integrity of the spinal cord from L4 to S2 and also determines if corticospinal tracts are functioning and properly myelinated. The normal plantar response is downward flexion of the toes. If there is damage, the great toe dorsiflexes and smaller toes fan laterally (Babinski's sign). Infants, who normally lack complete myelination, exhibit this sign.
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The larger the receptive field, the
A) larger the area of the somatosensory cortex in the brain that perceives the sensation. B) fewer primary sensory neurons are involved. C) more primary sensory neurons synapse on a secondary sensory neuron. D) stronger the stimulus intensity required to activate a sensory receptor.
Which of the following statements concerning myopia is correct?
a. the curvature of the lens is uneven. b. a near source of light is focused on the retina without accommodation. c. a convex lens is used to correct the condition. d. the images from the two eyes are not fused within the cortex. e. there is increased intraocular pressure.
Which of the following is not a layer of the kidney?
A. Renal medulla B. Renal capsule C. Renal cortex D. Renal pelvis
In a 24-hour period, how much urine is typically produced?
A) 0.5 L B) 0.9 L C) 1.4 L D) 2.0 L E) 3.4 L