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【单选题】
在居住建筑中,使用最广泛的木门是( )。A.
推拉门
B.
平开门
C.
弹簧门
D.
转门
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反馈参考答案：
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】当皮下组织的阻抗 (R1) 很小时,电流所通过阻抗最小的通路是 prefix="o" ns="urn:schemas-microsoft-com:office:office" ?xml:namespace>
A.
．神经系统
B.
．汗腺
C.
．皮肤
D.
．皮下组织
E.
．肌肉
【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
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