Categories
LIVING THINGS

The Cell Membrane -CM- ( structure & function)


As you already know your body is made up of billion of cell-the basic units of structure and function of all living things. Each cell has a cell membrane, that surrounds the cell  thus each cell  has its own environment. The cell membrane is acting like a guard that identifies what molecules leave or enter the cell. in this way  a stable internal environment is maintained (maintaining internal cellular  homeostasis).

                           microscopic structure of the cell membrane

Check this link for the detailed structure of the cell membrane.http://upload.wikimedia.org/wikipedia/commons/thumb/d/da/Cell_membrane_detailed_diagram_en.svg/75px-Cell_membrane_detailed_diagram_en.svg.png

The cell membrane is picky,decides what molecules pass in and out of the cells. Diffusion and active transport are the two processes that control the mechanism of transporting molecules through the cell. Cells communicate through receptor molecule on the cell membrane. These receptors recognize  and respond to messages received from other cells. Examples of these signals received are hormones, neurotransmitters.

Categories
LIVING THINGS REPRODUCTION AND DEVELOPMENT

MITOSIS (Making New Cells)


Categories
LIVING THINGS

To educators


You know that our  job as teachers has been  changed to a  facilitators role .We all agree renaming our profession is  not what it matters. As a teacher  and an academic person I believe we have to modify our role and adapt instruction to any format that deliver the lesson to the learner in a constructive process.  At the same time, for  the benefit of the student teachers should introduce the lesson as an initial step ,spaced  by differentiated instructional  activities based on Garner’s theory of multiple intellegencies.