HELP! The protein, lipid, and carbohydrate compositions of the cytoplasmic and extracellular sides of membranes are different from one another. Why is this the case. 1. Some membrane components are synthesized outside of the cell, while others are synthesized in the cytosol.

2. The two sides of a cell membrane face different environments and carry out different functions.

3. The molecular composition of the inner and outer layers of the cell membrane is determined by genes.

4. Proteins only function on the cytoplasmic side of the cell membrane, which results in a asymmetry across the membrane.

what statement best describes the difference between the sympathetic and parasympathetic nervous systems?

the sympathetic nervous system prepares the body for intense physical activity and is often referred to as the fight-or-flight response. the parasympathetic nervous system has almost the exact opposite effect and relaxes the body and inhibits or slows many high energy functions.

the correct answer is 4) heat and pressure

metamorphic rocks arise from transformation of existing rocks types, in a process called metamorphism. during metamorphism the original rock(prolith) change into metamorphic rock by heating (150-200c) and pressure of more than 1000 bar. the original rock can be sedimentary, igneous, or existing metamorphic rock.