Atoms or molecules with unpaired electrons that can react with normal cells and cause damage are called ______
A. free radicals
B. teratogens
C. mutagens
D. antioxidants
E. vitamins
A
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All plasma constituents filtered, secreted and reabsorbed remain in the tubules and pass into the renal pelvis to be excreted as urine
a. True b. False Indicate whether the statement is true or false
Which of the following statements concerning cerebrospinal fluid is incorrect? Cerebrospinal fluid
a. is formed by the choroid plexuses and is reabsorbed across the arachnoid villi into the blood within the dural sinuses. b. serves as a shock-absorbing fluid to cushion the brain against jarring movements. c. comes into direct contact with the neuronal and glial cells. d. fills the subarachnoid space. e. influences the composition of the brain interstitial fluid more than the blood does.
Where does each half of the visual field get segregated so that it reaches the opposite hemisphere of the brain?
A) optic chiasma B) lateral geniculate nucleus C) hypothalamus D) occipital lobe
Parkinson's disease is the result of
A) inadequate production of GABA by neurons in the basal nuclei. B) decreased levels of acetylcholine from neurons in the substantia nigra. C) inadequate production of dopamine by substantia nigra neurons. D) hyperactivity of the limbic system. E) weak response of the red nuclei of the midbrain.