Diffusion Across The Membrane
1
Diffusion is the movement of molecules (or ions) from a high concentration to low concentration. Diffusion is form of passive transport as energy does not need to be generated. Diffusion is complete when the concentration of molecules is equal on either side of the membrane.
Diffusion rate can be influenced by many factors such as:
Concentration gradient across the the membrane.
Permeability of the membrane to the diffusing substance.
Temperature.
Surface area of the membrane.
Question 2
2.1
Acetylcholine is an organic chemical that functions in the brain and body as a neurotransmitter it is an ester of acetic acid and choline. Acetylcholine is synthesized from acetyl coenzyme A and choline by the enzyme choline acetyltransferase, Coenzyme A is synthesized in mitochondria. Parts in the body that use or are affected by acetylcholine are referred to as cholinergic. it is the chemical that motor neurons of the nervous system release …show more content…
Energy is used in the form of ATP. Active transport is used to maintain the correct concentrations of ions to keep the cell working at an optimum level. Most of the energy produced by the cell is used to facilitate active transport. Thousands of proteins embedded in the cell's lipid bilayer. They are positioned to cross the membrane so one part is on the inside of the cell and one part is on the outside. Only when they cross the bilayer are they able to move molecules and ions in and out of the cell. If a molecule is to be transported from an area of low concentration to an area of high concentration, work must be done to overcome the influences of diffusion and osmosis. A vital active transport process that occurs in the electron transport process in the membranes of both mitochondria and chloroplasts is the transport of protons to produce a proton gradient. This proton gradient powers the phosphorylation of ATP associated with ATP
Diffusion is the movement of molecules (or ions) from a high concentration to low concentration. Diffusion is form of passive transport as energy does not need to be generated. Diffusion is complete when the concentration of molecules is equal on either side of the membrane.
Diffusion rate can be influenced by many factors such as:
Concentration gradient across the the membrane.
Permeability of the membrane to the diffusing substance.
Temperature.
Surface area of the membrane.
Question 2
2.1
Acetylcholine is an organic chemical that functions in the brain and body as a neurotransmitter it is an ester of acetic acid and choline. Acetylcholine is synthesized from acetyl coenzyme A and choline by the enzyme choline acetyltransferase, Coenzyme A is synthesized in mitochondria. Parts in the body that use or are affected by acetylcholine are referred to as cholinergic. it is the chemical that motor neurons of the nervous system release …show more content…
Energy is used in the form of ATP. Active transport is used to maintain the correct concentrations of ions to keep the cell working at an optimum level. Most of the energy produced by the cell is used to facilitate active transport. Thousands of proteins embedded in the cell's lipid bilayer. They are positioned to cross the membrane so one part is on the inside of the cell and one part is on the outside. Only when they cross the bilayer are they able to move molecules and ions in and out of the cell. If a molecule is to be transported from an area of low concentration to an area of high concentration, work must be done to overcome the influences of diffusion and osmosis. A vital active transport process that occurs in the electron transport process in the membranes of both mitochondria and chloroplasts is the transport of protons to produce a proton gradient. This proton gradient powers the phosphorylation of ATP associated with ATP