The vitamin that is part of coenzymes in glycolysis and the citric acid cycle is
A) thiamine.
B) riboflavin.
C) niacin.
D) folic acid (folate).
E) cobalamin.
Answer: B
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What bony arrangement would most effectively resist forces associated with weight bearing?
A. Trabeculae arranged in a random fashion permeated with large marrow spaces B. Lamellae of compact bone with collagen fibers arranged in tightly coiled helices C. Lamellae of compact bone with collagen fibers arranged in bundles parallel to the long axis of the diaphysis D. A diaphysis consisting of compact bone surrounded by a layer of trabecular bone E. Epiphyses with numerous spicules of bone that are randomly arranged
Saltatory conduction occurs in
A. myelinated axons, where action potentials occur only at neurofibril nodes. B. myelinated axons, where action potentials occur only under the myelin sheath. C. myelinated axons, where action potentials occur continuously down the entire axon. D. unmyelinated axons, where action potentials occur continuously down the entire axon. E. the axon terminal, where full-size action potentials occur at the hillock.
The first multicellular animals to develop neurons were
A) flatworms and sea urchins. B) mollusks and sea stars. C) fish and sea monkeys. D) jellyfish and sea anemones. E) segmented worms and sea horses.
Tactile and lamellated corpuscles are types of
A. nociceptors. B. photoreceptors. C. mechanoreceptors. D. thermoreceptors. E. chemoreceptors.