B.The hair on human heads helps keep heat in cold weather.C.If you lose 50 to 100 hairs every day,you must ask a doctor for help.D.Mammals have thick fur covering their whole bodies because they have no sweat glands. 相关知识点: 试题来源: 解析 (1)细节理解题。根据第2段"Thereare...
根 Scientists say the answers come down to evolution.及下 Humans probably evolved without fur because they have more sweat glands than other mammals.可知,人类随着进化没有了毛皮, 是因为人类比其他哺乳动物有更多的汗腺, evolution意为“进化,” ,选A 65.B 解析:细节理解题。 根据最后一段中的 The ...
Lee's death has long been the subject of speculation by fans, including the far-fetched theory proposed by biographer Matthew Polly that Lee's surgery to have his sweat glands removed caused his body to become overrun with a lethal amount of water. The autopsy ruled out any foul play or i...
Where are sweat glands located? Where is the parotid salivary gland located? Where is glandular epithelial tissue found? Are the lymph nodes part of the endocrine system? Where is cuboidal epithelial tissue found? Fill in the blank: Bacteria and debris are removed from lymph by ___ in the ...
Differences in distribution of hair, sebaceous glands, and apocrine (odorif- erous) and eccrine (true) sweat glands are readily apparent. Equally impor- tant, though much less obvious, are the striking differences in thickness of con- stituent skin layers in different regi...
根据文中“Humans probably evolved without fur because they have more sweat glands (汗腺) than other mammals. Humans walk upright on two legs. Therefore, the top of their heads needs protection from the sun.” ,从人类有更多汗腺,直立行走,头顶需防晒等描述可推测,人类没有毛发覆盖全身是随着时间逐渐...
At the cellular level, women's tear glands are anatomically different from men's, says Frey (some studies say they're bigger), and that's one of the reasons we cry so easily. He adds that the hormone prolactin, well known for its role in lactation, also regulates the development of ...
B. The hair on human heads helps keep heat in cold weather. C. If you lose 50 to 100 hairs every day. you must ask a doctor for help. D. All the mammals have thick fur covering their whole bodies because they have no sweat glands. ...
What area of your body has the greatest density of sweat glands? What area had the lowest? Why do you think that is? Which glands and areas of the body are a part of the endocrine system? Name the structure that separates the oral cavity from the nasal cavity. Which bones...
B. The hair on people's heads helps keep heat in cold weather. C. All the mammals have thick fur covering their whole bodies because they have no sweat glands.( B) 45. Which is the main ide a of this passage? A. It tells about the number of human hair. B. It tells about ...