Test your knowledge of ion diffusion across the plasma membrane by placing the correct word(s) in each sentence. Then, click and drag the sentences to arrange them in a logical paragraph order. attract ion channels negative membrane potential positive integral membrane repel electrochemical gradient concentration channel gating Ion diffusion depends on the , which is the separation ion channels of electrical charge across the plasma membrane. To begin, ions diffuse across plasma membranes by passing through formed by proteins. Thus, in determining ion flux, both the concentration difference and the membrane potential, collectively known as the , must be considered. For example, most cells have a net charge inside with respect to the outside, so there is an electrical force attracting ions into the cell. Ion diffusion also depends on the gradient that exists for that ion across the plasma membrane. Finally, ion flux across the plasma membrane can be altered by opening or closing ion channels, which is a process known as . Electrical charges of the same sign, both positive or both negative, each other, while opposite charges .

membrane potential; ion channels; integral membrane; electrochemical gradient; negative; positive; concentration; channel gating; repel; attract

Explanation:

Ion diffusion depends on the membrane potential which is the separation of electrical charge across the plasma membrane. To begin, ions diffuse across plasma membranes by passing through ion channels formed by integral membrane proteins. Thus, in determining ion flux, both the concentration difference and the membrane potential, collectively known as the electrochemical gradient, must be considered. For example, most cells have a net negative charge inside with respect to the outside, so there is an electrical force attracting positive ions into the cell. Ion diffusion also depends on the concentration gradient that exists for that ion across the plasma membrane. Finally, ion flux across the plasma membrane can be altered by opening or closing ion channels, which is a process known as channel gating. Electrical charges of the same sign, both positive or both negative, repel each other, while opposite charges attract.

the  frequency of a wave represents  the number of wavelengths that pass a specific point per second. the unit for  frequency  is hertz (hz).

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