When two or more graded potentials arrive at the trigger zone within a short period of time, their effects are additive and ________ occurs.
Fill in the blank(s) with the appropriate word(s).
summation
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The directional term that means "closest to the point of attachment to the trunk" is
A. distal. B. dorsal. C. proximal. D. medial. E. cephalic.
Neurotransmitters that are modified amino acids are
A. dopamine, serotonin, epinephrine, and norepinephrine. B. aspartic acid, glutamic acid, glycine, and GABA. C. potassium, sodium, and calcium ions. D. enkephalins, endorphins, and substance P.
Which type of cone responds to short wavelengths of 420 nm?
A. Green cones B. Blue cones C. Red cones
Compare pernicious anemia with iron deficiency anemia
A) Pernicious anemia is insufficient red blood cell production caused by a deficiency in vitamin B12, whereas iron deficiency anemia is insufficient red blood cell production caused by a deficiency in vitamin K. B) Pernicious anemia is insufficient red blood cell production caused by a deficiency in vitamin K, whereas iron deficiency anemia is insufficient red blood cell production caused by a deficiency in vitamin B12. C) Pernicious anemia is insufficient red blood cell production caused by a deficiency in vitamin B12, whereas iron deficiency anemia is an inherited disorder of malformed hemoglobin due to an amino acid chain mutation. D) Pernicious anemia is insufficient red blood cell production caused by a deficiency in vitamin B12, whereas iron deficiency anemia is impaired hemoglobin synthesis caused by a deficiency in dietary intake or absorption of iron. E) Pernicious anemia is an inherited bleeding disorder caused by the reduced production of a single clotting factor, whereas iron deficiency anemia is impaired hemoglobin synthesis caused by a deficiency in dietary intake or absorption of iron.