Chemicals in a solution can move down a concentration gradient. This means the chemical will move from the area of __________ concentration to the area of _________blank concentration.

equal; equal
lower; lower
higher; lower
higher; higher
lower; higher

Question

Chemicals in a solution can move down a concentration gradient. This means the chemical will move from the area of __________ concentration to the area of _________blank concentration.

equal; equal
lower; lower
higher; lower
higher; higher
lower; higher

BlackTom AI · Accepted Answer

Question restatement: Chemicals in a solution can move down a concentration gradient. This means the chemical will move from the area of ________ concentration to the area of ________ blank concentration.

Answer options:
1) equal; equal
2) lower; lower
3) higher; lower
4) higher; higher
5) lower; higher

Analysis of each option:
Option 1: equal; equal. This would imply movement from equal concentration to equal concentration, which describes no net movement along a gradient. Therefore this option does not describe diffusion down a gradient and is incorrect.
Option 2: lower; lower. This suggests movement from a lower concentration to another lower concentration. Since there is no gradient (or a gradient in the opposite direction), this does not align with movement down a concentration gradient. This option is incorrect.
Option 3: higher; lower. This matches the definition of diffusion down a concentration gradient: substances move from regions of higher concentration to regions of lower concentration. This option correctly captures the direction of net movement expected in passive diffusion. This is the correct interpretation of moving down a gradient.
Option 4: higher; higher. Moving from a higher concentration to an even higher concentration would imply movement up a gradient, not down. This contradicts the concept of diffusion down a gradient and is incorrect.
Option 5: lower; higher. This describes movement from a lower concentration to a higher concentration, which is movement up a gradient, not down. This option is therefore incorrect.

Summary: The only option that accurately represents motion down a concentration gradient is option 3, which states the substance moves from higher concentration to lower concentration. The other options mischaracterize the direction of diffusion, suggesting either no movement, movement up the gradient, or movement within equal concentrations rather than down the gradient.

Chemicals in a solution can move down a concentration gradient. This means the chemical will move from the area of __ concentration to the area of _blank concentration. equal; equal lower; lower higher; lower higher; higher lower; higher单项选择题

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Chemicals in a solution can move down a concentration gradient. This means the chemical will move from the area of __________ concentration to the area of _________blank concentration. equal; equal lower; lower higher; lower higher; higher lower; higher单项选择题