Answer:
Hydrophilic heads facing exterior
Hydrophobic tails facing interior
Explanation:
In 1972, the fluid mosaic model was proposed to describe the structure of the plasma membrane. This model describes the plasma membrane to possess components including phospholipids, cholesterol and proteins. The phospholipid component is composed of glycerol, two fatty acids and a phosphate-containing head, which are arranged in two adjacent layers forming the phospholipid bilayer in the membrane of biological organisms.
Phospholipids have both the hydrophilic and hydrophobic region. Hence they are said to be AMPHIPATHIC.
The head of the phospholipid is negatively charged due to its phosphate content, making it polar and hydrophilic i.e. water-loving. This hydrophilic head faces the exterior of the cell in order to interact with fluids.
The tails of the phospholipid are long fatty acids that keep away from water i.e. hydrophobic. Due to their water-fearing nature, they avoid water and face the interior of the cell, where each tail face each other.
Answer:Acids and bases In the human body, both blood and the cytosol (watery goo) inside of cells have pH values close to neutral. ... A base, in contrast, raises pH by providing hydroxide (OH −start superscript, minus, end superscript) or another ion or molecule that scoops up hydrogen ions and removes them from solution.
Explanation:
The texture will be rough
Answer:
The correct answer is: none of these mineral groups contain silicon.
Explanation:
The only minerals that contain silicon are the Silicates, for example, SiO2 (silica).
Halides are minerals that consist of a combination of elements from the seventh group that can form salts (like fluorine or chlorine), with other elements such as calcium and sodium. For example: NaCl (sodium chloride).
Carbonates are compounds that contain carbon and oxygen, for example, CaMg(CO3)2 (dolomite).
Sulfides consist of sulfur with another element. For example: ZnS (zinc sulfide).
