The arrector pili muscle's predominate, useful function in humans is to ________
A) stimulating faster hair growth
B) assisting in the release sebum from nearby sebaceous glands
C) preventing germs from entering the hair shaft
D) provide warmth by making the hair stand on end
B
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Many birds eat plant material, but the hoatzin (Opisthocomus hoazin), a South American bird, is the only avian species known to employ foregut fermentation. Hoatzins are herbivorous; green leaves make up more than 80 percent of their diet
More than a century ago, naturalists observed that hoatzins smell like fresh cow manure, and a study of the crop and lower esophagus of hoatzins revealed that bacteria and protozoa like those found in the rumen of a cow break down plant cell walls, releasing volatile fatty acids that are absorbed in the gut. Considering the abundance of plant material that is available to birds and the widespread use of fermentative digestion by mammals, why do you think the hoatzin is the only foregut fermenter among birds?
The ischium is the anterior part of the hip bone.
Answer the following statement true (T) or false (F)
The grips on the heels and outsides of the front shoes of horses are known as:
A) aids B) calks C) cradles D) pinchers
Addition of phosphate groups to a particular molecule is catalyzed by ________.
transaminases phosphatases isomerases kinases