Organizational part - 5 minutes. Rollcall of the students and elucidation the reasons of the absence of students, checking of the
Rollcall of the students and elucidation the reasons of the absence of students, checking of the conspectus. Number of forming competencies:knowledge, practical skills. Main questions of the theme: 15 minutes 1. Passive transport. 2. Types of passive transport. 3. Diffusion. Types of diffusion. 4. Lateral diffusion. 5. Fick’s equation. Learning and teaching methods: - analysis and discussing of main and control questions; - solving of standard and situational problems; - testing. Methods of the control of formed at classes competencies: - solving of standard and situational problems; - opinions exchanging at the studying of educational material; - testing on a computer (a student has to give the answers for test questions that contain minimal knowledge and skills – main definitions, theoretical questions of the theme). Students’ independent work - 15 minutes · Explain the context and find the ways of solving the problems. · Transform the formula and convert the unit of physical quantities. Problems: 1. Calculate the distribution coefficient K for a substance if at thickness of membrane 2. Calculate the permeability coefficient P for a substance which flow through the membrane is 3. Difference of concetrations of molecules on a cell is 45 mmol/L, distribution coefficient between membrane and environment is K=30, diffusion coefficient is
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diffusion coefficient is 0,2 сm2/sec and permeability coefficient is Р=210 сm/sec.
m2sec. Concentration of the substance inside the cell is 
and outside the cell is 
.
, flow density is 
. Calculate the thickness of the membrane.
