Latrotoxin, produced by the poisonous black widow spider, increases the release of acetylcholine. How do muscle cells respond?
A) Muscle cells will experience a longer latent period when excess acetylcholine exists.
B) Muscle cells will become paralyzed when excess acetylcholine exists.
C) Muscle cells will experience fused or complete tetanus when excess acetylcholine exists.
D) Muscle cells will twitch irregularly when excess acetylcholine exists.
Answer: C
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The trachea divides into ________ bronchi that lead to the lungs
A) 2 B) 3 C) 4 D) 5
Which is true regarding the absorption of nutrients during digestion?
A. Fat-soluble vitamins (A, D, E, and K) are absorbed along with the products of protein digestion. B. Lipids are chemically digested to fatty acids and glycerides, and were absorbed into the lacteals in the large intestinal villi. C. Proteins are chemically digested to amino acids and absorbed into the blood of capillaries in the small intestine. D. Carbohydrates are chemically digested to monosaccharides and were also absorbed into the blood of capillaries in the stomach.
The amino acids that must be consumed in the diet are called essential. Nonessential amino acids
Water striders are insects that literally walk on water. These insects are frequently found living on ponds. If hydrogen bonds did not exist, how would this affect the life of water striders?
What will be an ideal response?