Answer:
Answered below
Explanation:
Cell membranes are barriers which protect and regulate the movement of substances in and out of the cells. It is a semi-permeable and selective structure.
In the passive transport system, substances move along a concentration gradient and it doesn't require energy. The examples of passive transports include; simple diffusion which transports carbon dioxide and oxygen, osmosis and facilitated diffusion which transports charged molecules like ions, sucrose etc.
In active transport, substances move against the concentration gradient. This requires energy. The two main types are: primary active transport, which uses direct metabolic energy e.g Na+/K+ pump, and the secondary active transport system which couples the transported molecules with another molecule moving along the gradient, example the Na+/glucose transporter.
Answer: So safety officials can ensure that all guidelines are being followed. so workers' families can be given correct compensation for accidents. so employers can know which employees are more accident-prone
Explanation:
Hey there,
The answer is - <span>Most effective- 30 minutes prior so they can penetrate skin. Reapply after sweating or swimming.
Hope this helps :))
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Answer:
206 in a fully grown adult and more than that in a child (300 at birth)
Explanation:
kids have more and as they grow bones fuse together
