What is the difference between fatty acids on the cell membranes of animals and plants

One is saturated fatty acids, the other is unsaturated fatty acids, people can't eat too much saturated fatty acid food, they will get cardiovascular diseases and other diseases, and they are prone to obesity, so they should eat more vegetable oil.

There are three main types of membrane lipid bands: phospholipids, glycolipids, and cholesterol. Mainly phospholipids. Lipids form the backbone of the membrane in the form of a bilayer. Lipids make up 50% of the chemical composition of cell membranes.

Under the electron microscope, it can be divided into three layers, that is, there is a thick dense band of electrons on the inner and outer sides of the membrane, and a thick zona pellucida band is sandwiched in the middle, and the total thickness is about about This structure is not only seen in various cell membranes, but also has similar structures in various organelle membranes such as mitochondria and endoplasmic reticulum.

The cell membrane is located on the cell surface and is usually 7 to 8 nm thick and is composed of lipids and proteins. Its most important property is semi-permeability, or selective permeability, which has a strong selective permeability to substances entering and exiting the cell. The cell membrane and the intracellular membrane system are collectively referred to as biomembranes and share the same basic structural characteristics.

The lipids that make up the cell membrane of plants are collapsed or filial: phospholipids, proteins, and sugars. Phospholipids, also known as phospholipids and phospholipids, refer to lipids containing phosphoric acid and belong to complex lipids.

Phospholipids are the main components of biofilms, which are divided into two categories: glycerophospholipids and sphingomyelins, which are composed of glycerol and sphingosine groups, respectively.

The cell membrane is mainly a semi-permeable membrane composed of phospholipids, with a thickness of 7 8 nm, and for animal cells, the outer side of the membrane is in contact with the external environment. Its main function is to selectively exchange substances, absorb nutrients, excrete metabolic wastes, secrete and transport proteins.

There are two main types of lipids that make up biofilms:

1. Simple lipids: mainly composed of fatty acids and alcohols, one is a compound lipid, in addition to the above fatty acids and alcohols, it also contains some non-lipid molecules.

2. Derived lipids: It is derived from simple lipids and complex fats together, and also has the general jujube burning substance of lipid stool deficiency.

1. Differences.

1) Molecules such as sensitive structures.

Most of the fatty acids contained in animals are saturated fatty acids, while most of the fatty acids contained in plants are unsaturated fatty acids.

2) Grease state.

Animal fats are in a solid state at room temperature, and vegetable fats mostly become liquid at room temperature.

3) Fatty acid composition.

The main fatty acid components of animal fats are palmitic acid, triglycerides of stearic acid, etc.

The main fatty acid components of vegetable fats are: linoleic acid, oleic acid, palmitic acid, linolenic acid, etc.

2. Similarities.

1) Most of the fatty acids contained contain 12-24 even carbon atoms, and the largest content is 16-18 carbon fatty acids.

2) The position of the double bond of the monounsaturated fatty acids contained in it is generally between the 9-10 carbon atoms, and the remaining double bonds are between C10 and the terminal methyl group, and there is often a CH between the two double bonds.

3) The unsaturated fatty acids contained in them almost all have the same geometric configuration, and they all belong to the cis configuration, and only a few trans ones.

The lipids on the cell membrane include phospholipids, cholesterol, glycolipids, and there are about 109 lipid molecules on the plasma membrane of each animal cell, that is, about 5x106 lipid molecules on the plasma membrane per square micron.

The cell membrane is composed of membrane lipids, membrane proteins, and membrane sugars.

The lipids of cell membranes are made up of phospholipids, fats, and sterols, which include cholesterol, sex hormones, and vitamin D.

All belong to fats, and the low temperature of animals is easy to solid, and the plants are generally not solid.

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