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【单选题】
患者男,40 岁。既往有肝硬化史。因 3 小时前呕鲜红色血 800ml 而急诊入院,查体:血压110/80mmHg,心率 100 次/分,下列对患者护理措施不正确的是A.
去枕平卧,头偏向一侧
B.
给予流质饮食
C.
备好三腔二囊管备用
D.
立即建立静脉通道
E.
输液补充血容量
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举一反三
【单选题】H2O pass through the cell membran by .
A.
Simple Diffusion
B.
Facilitated Diffusion
C.
Active Transport
D.
Cotransport
【单选题】Most molecules and all ions require a process to across cellular membranes. The process is mediated by selective ( ).
A.
membrane transport proteins
B.
membran carbohydrate
C.
peripheral membrane proteins
D.
lipid-anchored membrane proteins
【单选题】Crossing a membrane by simple diffusion can be distinguished from facilitated diffusion because:
A.
Simple diffusion does not require energy: facilitated diffusion requires a source of ATP.
B.
Simple diffusion can only move material in the direction of a concentration gradient; facilitated diffusion moves materials with and against a concentration gradient.
C.
Simple diffusion is not saturable; facilitated diffusion rates are limited by the number of functional membrane proteins and can be saturated
D.
Simple diffusion is found only in prokaryotes while facilitated diffusion is found only in eukaryotes.
【单选题】According to the passage, which of the following is important in explaining a muscle movement（）
A.
The flow of blood to the muscles.
B.
Classical conditioning.
C.
Protein interactions.
D.
The entry of unpleasant stimuli through the cell membran
【单选题】Solutions A and B are separated by a semipermeable membrane that is permeable to K + , but not to Cl - . Solution A is 100 mM KCl, and solution B is 1 mM KCl. Which of the following statements about s...
A.
K + ions will diffuse from solution A to solution B until the [K + ] of both solutions is 50.5 mM
B.
K + ions will diffuse from solution B to solution A until the [K + ] of both solutions is 50.5 mM
C.
KCl will diffuse from solution A to solution B until the [KCl] of both solutions is 50.5 mM
D.
K + will diffuse from solution A to solution B until a membrane potential develops with solution A negative with respect to solution B
E.
K + will diffuse from solution A to solution B until a membrane potential develops with solution A positive with respect to solution B
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