Cell diffusion is not particularly limited by molecular distribution. the rate considers the external temperature, distance to travel, time, solute’s mass, solvent’s density, and possible imperfections to the membrane. although the investigation will involve passive transport, it is important to note, within a cell, there are various forms of selectivity. the plasma membrane’s interior, exterior, protein channels, and amphiphilic nature all limit what molecules would enter the cell and how much. understanding both active and passive transport occur simultaneously enforces molecular transportation to be complex.

Which of the following statements is correct in hour our immune system responds to a potential pathogen? a. the adapted immune system will call on the innate immune system to destroy the pathogen. b. b cells will start reading the antigen code immediately and call t cells to assist in destroying the pathogen. c. the skin will be the first line of defense, and then the many phagocytes in the bloodstream will attempt to consume the possible pathogen. d. the t-cells in the adapted immune systems are the first to recognize the pathogen vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a. antigen, antibody b. antibody, antigen c. antibody, antibiotic d. antibiotic, antibody