REFLECTIONS

I have learned this about the function of membrane.  The plasma membrane is the thin outer boundary of a cell that regulates the traffic of chemicals between the cell and its surroundings.  It has control of what substances can enter the cell and which can not.  The function of plasma membrane is to keep all of the contents of the eukaryotic cell inside of the cell. This function is made possible by proteins.  phospholipids make up the plasma membrane.  

What i have found difficult is all of the vocabulary needed to understand the concepts in this chapter.  when i read about how certain organelles and different parts of a cell interact in order to relate them together and fully comprehend any of these concepts i have to go back to my vocabulary list and refresh my memory.  memorization of all of the vocabulary is a major challenge for me.  

There are many ways in which energy is utilized with in an organism to do work.  Some actions in a cell require no energy to be expended, such as passive transport diffusion across a membrane requiring only the random motion of molecules.  Then theres active transport movement of molecules across a membrane requiring energy to be expended by the cell.