Living organisms are made up of ______ levels of organization

The cell membrane is a

It called “the lipid bilayer”

The cell membrane is a semipermeable and allows only the _____ substances to pass through

is responsible for the structural integrity of lipid layer of the cell membrane

the proteins that pass through entire thickness of
plasma membrane

_______ molecules are negatively charged and do not permit the negatively charged substances to move in and out of the cell

Some _______ molecules function as the receptors for some hormones

It is involved on the synthesis of non-protein substances such as cholesterol and steroid

skeletal muscle cells are

pass through protein channels that extend from the extracellular to the intracellular ends of the cell membrane

acetylcholine channels which is very important in transmission of nerve signals are