There are four types of plate boundaries:
Divergent boundaries -- where new crust is generated as the plates pull away from each other.
Convergent boundaries -- where crust is destroyed as one plate dives under another.
Transform boundaries -- where crust is neither produced nor destroyed as the plates slide horizontally past each other.
Plate boundary zones -- broad belts in which boundaries are not well defined and the effects of plate interaction are unclear.
<span>Fats make up the largest category of lipids and also go by the terms triacylglycerols, triglycerides, and glycerolipids. There are several types of fats. Saturated fat is a lipid that exists as a solid substance when it is at room temperature. Milk, cheese, meat, and other animal foods contain saturated fat.</span>
Answer:
This is because the receptor is in the interior of the cell
Explanation:
When a specific signaling molecule is added to a cell whose cell surface has been stripped off by proteins the cell still responds because the receptor is in the interior of the cell.
Receptors are divided into two categories which are;
- Intracellular receptors or internal receptors which are found in the cytoplasm or nucleus of the cell. They respond to hydrophobic ligand molecules which are able to travel across the plasma membrane
- Cell surface receptors which are found in the plasma membrane
Signalling molecules are necessary for the coordination of cellular responses by serving as ligands and binding to cell receptors.
A type of signaling molecule are the small hydrophobic ligands which can directly diffuse through the plasma membrane and interact with internal receptors unlike the water soluble ligands. This is why the cell still responds after you strip off all proteins on the cell surface.
NOTE: Nitric oxide (NO) is a gas that also acts as a ligand, therefore it can pass through the plasma membrane of the cell and interact with receptors.
Answer: The framework of connective tissue between the skin and underlying muscles is called the superficial fascia.
