Sebum is a secretion that:

Question

BlackTom AI · Accepted Answer

Question restatement: Sebum is a secretion that:
Option 1: maintains water balance through waterproofing the skin. This describes a function more closely associated with the skin’s lipid barrier and certain waterproofing properties, but sebum’s primary roles are not framed as waterproofing for maintaining water balance, making this choice not the best fit.
Option 2: lubricates skin and helps defend against bacteria. This option aligns with the known function of sebum, which provides lubrication to the skin and contributes to the acid mantle that helps inhibit bacterial growth, making it the most accurate choice.
Option 3: cools the skin and eliminates certain drugs. Cooling the skin is mainly a function of sweat (sudoriferous glands), not sebum, and sebum is not involved in eliminating drugs; this makes the statement mistaken on both cooling and excretion aspects.
Option 4: acts as a pheromone once reproductive maturity is reached. While some secretions can have pheromonal roles, sebum is not typically described as a pheromone-producing secretion in standard physiology, so this is an incorrect characterization of sebum.

Putting the options together, the most accurate description among them is that sebum lubricates the skin and helps defend against bacteria, reflecting its protective and lubricating roles in the integumentary system. The other choices either describe functions of other secretions (like sweat) or attribute roles to sebum that are not supported by typical physiology texts, leading to misinterpretation of its primary purpose.

Sebum is a secretion that:单项选择题

类似问题

In the image below, the glands indicated with an asterisks secrete sebum into the hair follicle. What is the name of these glands?

Glands that discharge an oily secretion into hair follicles are Answer Question 13[input] glands.

Is the following statement true or false? In the products of methylation-hydrolysis, every -OH group corresponds to the position of a glycosidic bond in the starting polysaccharide.

Which of the follwoing structures represents amylopectin?

Which of the following is true about an aldopentose?I. It is a monosaccharide.II. It contains a CHO groupIII. It is a disaccharide.IV. It is an oligosaccharide.

For stock A, we have 𝛽 𝑖 = 0.70. Suppose the expected market risk premium next year is 9% and the risk-free rate is 3%. What is the expected return of this stock based on the CAPM? (Please answer in % and round to 2 decimal places. If the answer is 8.057%, then in the box, write 8.06)

更多留学生实用工具

智能学习助手

风格化写作助手

论文查重助手

文献引用助手

课堂转译助手

课堂笔记助手

Quiz搜索助手

学校历年真题

智能刷题助手

智能匹配练习

希望你的学习变得更简单