intregal membrane protein
Answer:
CO2 and N2 movement in and out of cells is unaffected when membrane protein activity is blocked.
Explanation:
The selective permeability of the biological membranes, like a cell membrane, to small molecules, allows the cell to control and maintain its internal composition.Free diffusion across the lipid bilayer can happen only for small uncharged or nonpolar molecules, such as CO2 and N2. Thus, they can easily cross cell membranes, without the assistance of the transmembrane proteins. Small uncharged polar molecules, such as H2O, also can diffuse through membranes without any help from channel proteins or carrier proteins, which are the two types of transmembrane proteins.
In the case of molecules like glucose, passage across the membrane occurs via the action of specific transmembrane proteins, which act as transporters. These transmembrane proteins allow polar or charged molecules to cross the membrane through a protein pore without interacting with the hydrophobic fatty acid chains of membrane phospholipids.
Answer:When the energy from the Sun hits a chloroplast and the chlorophyll molecules, light energy is converted into the chemical energy. Plants use water, carbon dioxide, and sunlight to make sugar and oxygen.
Explanation:
Answer:
The lower back pain and bilateral leg pain is due to over and intense physical activity which causes stretching of ligaments and muscles resulting in back and leg pain. Such pain can be managed by limited or by reducing physical activity. The dark color of urine is due to the presence of bile (bilirubin) in the urine. Here the patient has a past medical history of alcohol abuse. Excessive alcohol intake enhances gut permeability resulting in enhanced absorption of bacterial endotoxins. Excessive endotoxins in the liver cause damage of the kupffer cells in the liver, resulting in the release of bilirubin in the blood which ultimately passes through kidneys into the urine.
Explanation:
In a simple synapse, neurotransmitter chemicals are received by the postsynaptic membrane, also known as the dendritic membrane.