Answer:
<u>d. Transport proteins within the membrane serve as a tunnel for molecules to enter the cell.
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Explanation:
Solutes are typically moved across the cell through either passive or active transport. The cells, surrounded by a bilipid layer or plasma membrane is amphiphlic- its polar, hydrophilic lipid heads face outwards, while their non-polar hydrophobic lipid tails face inwards towards each other.
While lipid-soluble molecules move across the layer easily, it is also difficult for charged and also large molecules to move across its surface, into the cell. Transmembrane channels, <u>embedded within the membrane</u>, help to maintain selective permeability as transport proteins, pores and gated channels. Simple diffusion happens as a method of passive transport in cells through plasma membranes.
The solutes travel through the plasma membrane in the process of diffusion from regions of high concentration to regions of low concentration; this occurs without the use of energy. <u>Molecules moving against their concentration require active transport mechanism to cross the membrane</u>.
Answer:
Phrases that are only used in one area of the country.
Explanation:
Forensic Linguists specialize in cadence of speech, grammatical lapses, or terms associated with a specific region.
So that should be your answer!
Answer:
the answer would be the first one which is sexual reproduction
Answer:
If any of the pictures represent the picture I attached or have any similar properties to it, that is most likely the answer.
Explanation:
Hope this helped :)
Answer:
Can please add some detail to your question...
Explanation:
