Which of the following statements correctly describes the function of the cell membrane? prevents harmful materials from entering the cell
synthesizes proteins for the cell
creates energy used by the cell
removes waste materials from the cell
regulates uptake of materials needed by the cell
select all correct answers

option a is correct i.e.

explanation:

in context to the membrane of nerve impulse, the outer membrane of neuron is semi permeable that is only sodium ions can pass through the membrane i.e. smaller ions can pass through the membrane while larger ions cannot pass through it.

i think it would be b. tissue because an organ system is a group of organs that work together to perform one or more functions. each does a particular job in the body, and is made up of certain tissues.