The abnormality that develops when a lens loses its transparency is known as
A) glaucoma.
B) myopia.
C) macular degeneration.
D) a cataract.
E) Fuch's dystrophy.
D
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The vertical osmotic gradient in the kidney
a. is established and maintained by the countercurrent system. b. makes it possible to put out urine of variable concentration depending on the needs of the body by varying the degree of water permeability of the distal portions of the nephron. c. is found in the renal cortex. d. both (a) and (b) above. e. all of these answers.
A patient is with back pain and a severe headache is diagnosed with pyuria. Explain this diagnosis and provide a possible explanation for it
What will be an ideal response?
A person is exposed to a drug that prevents vesicles from forming in neurons. Predict the effect this will have on nerve function.
A. Neurons will be hyper-excitable. B. Voltage-gated potassium channels will be blocked, slowing depolarization and slowing nerve impulses. C. Neurotransmitters won't be released into the synapse via exocytosis. D. Action potentials will not be carried through the axon.
Which of the following helps to keep blood nutrients at normal levels six to eight hours after a meal?
A. parasympathetic stimulation of the pancreas B. breakdown of glycogen in the liver releasing glucose C. increased production of insulin by the pancreas D. increased glucose uptake by cells E. glycogen synthesis