Lateral inhibition via amacrine cells in the mammalian retina _____
A) underlies habituation of vision
B) enhances visual contrast
C) prevents bleaching in bright light
D) is required for color vision to occur
E) recycles neurotransmitter molecules
Answer: B
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Which structure is normally on the 5' end of a DNA strand?
A. nitrogenous base B. hydroxyl group C. sulfur group D. phosphate group
Dr. Webber joined the Gelder Medical Group, which was a medical partnership. Part of the agreement was that if for any reason his association with the group ended, he would not practice medicine for five years within 30 miles of the Village of Sidney, where the partnership was located. The agreement also provided that any member could be required to withdraw from the partnership upon a majority vote of the other members. Dr. Webber’s work with the group turned out to be unsatisfactory to his partners, who felt he was an embarrassment to the group. Dr. Webber refused to withdraw from the association after he was terminated by the other physicians. Two months later, despite his earlier agreement, Dr. Webber opened a medical office in Sidney. The partnership brought suit to prevent him
from carrying on his practice. Could they do this successfully?
Parenchyma, collenchyma, and sclerenchyma are all types of cells derived from
A. epidermal tissue. B. ground tissue. C. cork cambium tissue. D. procambium tissue. E. vascular cambium tissue.
Honeybees have an incredible ability to distinguish thousands of different odorant molecules, using their large repertoire of olfactory receptors. A wide variety of different types of chemicals can be detected as odorants; they simply require olfactory neurons with a receptor that can bind the chemical and transduce that stimulus into a receptor potential.If genetically engineered bees could express a receptor for TNT in their olfactory neurons, what type of receptor would the TNT receptor be?
A. Chemoreceptor B. A novel type of receptor C. Mechanoreceptor D. Electromagnetic receptor