# Forum:Seminar papers/Biophysics/2. LF/2017-2018/Group 3B (Capucine): MCQ - Thermodynamics, Biophysics of Cells and Tissues

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THERMODYNAMICS

1. what are the different thermodynamic parameters:

A. pressure, volume, temperature and entropy

B. internal energy, entropy, pressure and Gibbs free energy

C. Gibbs free energy, enthalpy, volume and temperature

D. enthalpy, entropy, volume and temperature

A. closed system: only exchanges energy; adiabatic system: can exchange heat and energy but not matter

B. closed system: exchange heat, energy and matter; adiabatic system: can exchange energy but not heat and matter

C. closed system: exchange heat and matter but not energy; adiabatic system: can exchange only heat

D. closed system: exchange heat and energy but not matter; adiabatic system : can exchange energy but not heat and matter

3. what are some sources of direct energy loss of an organism?

B. convection, evaporation from body surface, radiation

C. convection, conduction, evaporation from lungs

D. evaporation from lungs, evaporation from body surface and radiation

4. Cryotherapy is used in medicine for

A. along side chemotherapy or radiotherapy against tumours

B. in cryosurgery to destroy damaged tissues by a frozen probe (usually liquid nitrogen)

C. for « ice pack therapy » to provide vasoconstriction with reflexive vasodilatation, increase oxygen demand locally and increase nerve conduction to reduce the pain small injuries

D. DNA repair because it will increase the number of unpaired DNA breaks induced by radiation

5.Which of the following statement is FALSE about thermoregulation of the body

A. fever is an important mechanism to cool a body down

B. metabolism increase is used by the body to lower the temperature

C. vasodilation is a mechanism important to decrease an organism’s temperature

D. vasoconstriction is important to increase an organism’s temperature

BIOPHYSICS OF THE CELL AND TISSUE

6. what is the energetic equation of ATP production by a mitochondrion

A. NADH + O2 + H+ + ADP + Pi -> NAD+ + 2 H2O + ATP

B. NAD+ + 1/2 O2 + H+ + ADP + Pi -> NADH + H2O + ATP

C. NADH + 1/2 O2 + H+ + ADP + Pi -> NAD+ + H2O + ATP

D. NAD+ + O2 + H+ + ADP + Pi -> NADH + 2 H2O + ATP

7. What is osmosis?

A. Diffusion of water through a semi-permeable membrane

B. When you take water out of a cell

C. When you put water into the cell

D. none of the above

8. when a cell is placed in hypotonic medium:

A. Concentration of solutes outside a cell is higher than that inside, resulting in swelling of cells.

B. Concentration of solutes inside a cell is lower than that outside, resulting in shrinking of cells.

C. Concentration of solutes inside a cell is higher than that outside, resulting in swelling of cells.

D. Concentration of solutes outside a cell is lower than that inside, resulting in shrinking of cells.

9. a substance can only be accumulated against its electrochemical gradient by:

A. facilitated diffusion

B. Passage through ion channels

C. Diffusion through a uniport

D. Active transport

10. for diffusion to occur which condition is mandatory

A. an hypotonic external medium is required

B. a concentration gradient must exist

C. an hypertonic external environment is required

D. dynamic equilibrium must exist

1 A

2 D

3 A

4 B

5 B

BIOPHYSICS OF THE CELL AND TISSUE ANSWERS

6 C

7 A

8 C

9 D

10 B