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Free_Kalibri [48]
3 years ago
10

Which three types of hazardous conditions make food unsafe for consumption

Biology
1 answer:
denis23 [38]3 years ago
4 0

Answer:

The 3 Types of Hazards

Biological hazards include bacteria, parasites, fungi and viruses. They can develop in poorly handled food or through contamination from an outside source. ... Chemical hazards are harmful substances such as pesticides or machine oils. These hazards are present at every stage of food handling.(brought to you by online)

  • Bacteria
  • Parasites
  • Fungi
  • Viruses
  • Salmonella  (meat poisoning)

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Explanation:

These are type of membrane proteins that transcend the entire length of  phosphoslipid  bi- layer  in the plasma membrane.They facilitate the movement of ions  and molecules across  the walls of the plasma membranes.

Generally, substances like glucose, amino acids, are too large to pass through the phopholipid bilayers. Likewise ions of  potassium, sodium calcium, because of their polarities can not pass through either. They are ferried across the phospholipid by  group of protein structures called channel proteins. Some are also transported across by carrier  proteins.  The process by which these protein structures  aided the  diffusion of substances across the phospholipid bilayer is called Facilitated diffusion.

Channel proteins are pores, that are filled with water molecules with the entrance  well gated.  That is the entrance  is controlled by part in the inner structure  of the protein  which can open or close the pores  like a gate to control the movement of ions across it. e.g Sodium channels are gated for  movement  of sodium ions by voltage or ligands(chemicals) during  nervous  transmission to elicits action potential. Like wise Potassium channels allow  diffusion of potassium ions across the phospholipid bilayers. it gates are shut when sodium channels are open; this  regulate ion exchange.

Their structures are well fixed in shape , specific  to the substance or ions being  transported;and the rate of diffusion  depends on  the like hood of opening of the gate or closure.

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Therefore these two membrane integral  proteins  facilitate movements of substances across the phospholipild bilayers

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