Skin has a unique multi-layer structure, which helps to complete a series of physiological functions
举一反三
- Which of the following are the basic functions of the physical layer?()
- Which of the following refers to the outermost layer of the skin? A: sebaceous B: epidermic C: epidemic D: epidural
- Flow control is one of the basic functions of the data link layer. Regarding flow control, which one is correct among following statements? A: Only the data link layer has flow control B: Not only the data link layer has flow control, but the flow control objects of each layer are the same C: Not only does the data link layer have flow control, but the flow control objects of each layer are different D: None of the above is right
- Every living thing has its skin which is an invisible physical boundary.
- Which is not the major functions of fats?（ ） A: It can maintain body temperature. B: It can protect the viscera from colliding injury. C: It can maintain the structure and function of biomembranes, convert to some physiological important substances. D: It is the most concentrated source or food energy. It provides 37.6kJ of energy per gram.