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Biophysics Quiz on Chapter 5, created by Y Y on 18/05/2019.

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Chapter 5

Chapter 5

Question 1 of 25

1

182. Which of the following definitions refers to osmotic pressure?

Select one of the following:

  • a) the pressure exerted by the solute particles on a semipermeable membrane, due to their thermal motion;

  • b) the pressure exerted on a semipermeable membrane from the solvent particles, due to their thermalmotion;

  • c) the pressure that proteins of blood plasma apply onto the walls of capillaries.

Explanation

Question 2 of 25

1

183. What is the necessary condition for ion diffusion across a semipermeable membrane?

Select one of the following:

  • a) energy supplied from ATP molecules;

  • b) concentration gradient across the membrane;

  • c) electrical gradient across the membrane.

Explanation

Question 3 of 25

1

184. When placed in the following type of solution, cells will retain water and will inflate:

Select one of the following:

  • a) isotonic solution;

  • b) hypotonic solution;

  • c) hypertonic solution.

Explanation

Question 4 of 25

1

This scientist have contributed to the laws of diffusion:

Select one of the following:

  • a) Paul Dirac;

  • b) Adolf Fick;

  • c) Fridtj of Nansen.

Explanation

Question 5 of 25

1

When placed in the following type of solution, cells will lose water and will shrink:

Select one of the following:

  • a) isotonic solution;

  • b) hypotonic solution;

  • c) hypertonic solution.

Explanation

Question 6 of 25

1

Which of the following is a necessary condition for stopping osmosis?

Select one of the following:

  • a) when the pressure of the solute molecules on the semipermeable membrane is equal to the pressure exerted by the water molecules on the other side of the membrane;

  • b) when the pressure from the protein molecules on the semipermeable membrane is equal to the pressure exerted by the water molecules on the other side of the membrane;

  • c) when the pressure on the membrane from the small solute molecules in the intracellular space is equal to the pressure from the protein molecules.

Explanation

Question 7 of 25

1

188. What type of membrane transport is the osmosis:

Select one of the following:

  • a) active;

  • b) passive;

  • c) facilitated.

Explanation

Question 8 of 25

1

189. Vasogenic cerebral edema is characterized by:

Select one of the following:

  • a) inflation of the extracellular spaces;

  • b) inflation of the intracellular spaces;

  • c) vasodilation of cerebral vessels.

Explanation

Question 9 of 25

1

190. The isotonic factor of Van’t Hoff for non-electrolytes is:

Select one of the following:

  • a) 0;

  • b) 1;

  • c) 2

Explanation

Question 10 of 25

1

191. Which of the following is a necessary condition for osmosis?

Select one of the following:

  • a) a non-permeable membrane;

  • b) a semi-permeable membrane;

  • c) ATP energy source.

Explanation

Question 11 of 25

1

192. For a given temperature, solutions with equal concentrations will have equal osmotic pressure.
These solutions are called:

Select one of the following:

  • a) isotonic;

  • b) hypertonic;

  • c) hypotonic

Explanation

Question 12 of 25

1

193. Relative to the blood, physiological solution with 0.9% of NaCl is:

Select one of the following:

  • a) hypertonic;

  • b) isotonic;

  • c) hypotonic.

Explanation

Question 13 of 25

1

194. Which of the following factors do not have an effect on osmotic pressure?

Select one of the following:

  • a) the concentration of solutes;

  • b) the type of solutes;

  • c) the temperature of solutes.

Explanation

Question 14 of 25

1

195. Cytotoxic cerebral edema is characterised by:

Select one of the following:

  • a) inflation of the extracellular spaces;

  • b) inflation of the intracellular spaces;

  • c) loss of water.

Explanation

Question 15 of 25

1

196. Passive membrane transport of uncharged particles is driven by:

Select one of the following:

  • a) electrical gradient

  • b) concentration gradient

  • c) temperature gradient

Explanation

Question 16 of 25

1

197. Osmosis is defined as:

Select one of the following:

  • a) an active transport of solvent molecules across a semipermeable membrane from area of low concentration into area of high concentration;

  • b) a passive transport of solvent molecules across a semipermeable membrane from area of higher concentration into an area of lower concentration;

  • c) an active transport of solute molecules across a semipermeable membrane from an area of low
    concentration into an area of high concentration.

Explanation

Question 17 of 25

1

198. The following equation describes:

Select one of the following:

  • a) Fick’s law of diffusion;

  • b) Van’t Hoff law of osmosis;

  • c) Nernst equation.

Explanation

Question 18 of 25

1

199. The directed motion of solute particles, leading to equalization of concentrations across a
permeable membrane, without the use of external forces is:

Select one of the following:

  • a) osmosis;

  • b) diffusion;

  • c) reabsorption

Explanation

Question 19 of 25

1

200. What cause the end of net ion diffusion across the membrane?

Select one of the following:

  • a) equalisation of ion concentrations on both sides of the membrane;

  • b) heating up of the less concentrated solution;

  • c) engaging of membrane co-transport.

Explanation

Question 20 of 25

1

201. What are the two types of membrane transport according to the energy requirements?

Select one of the following:

  • a) diffusion and osmoses;

  • b) passive transport an facilitated diffusion;

  • c) passive and active transport.

Explanation

Question 21 of 25

1

202. Which of the following membrane transports is NOT passive?

Select one of the following:

  • a) aquaporins;

  • b) ion channels;

  • c) ion pumps.

Explanation

Question 22 of 25

1

Osmosis across semipermeable membrane occurs due to:

Select one of the following:

  • a) difference in hydrostatic pressure;

  • b) different concentrations of solute;

  • c) different volume of solvent.

Explanation

Question 23 of 25

1

Transport across the cellular membrane without direct use of metabolic energy is called:

Select one of the following:

  • a) passive transport;

  • b) active transport;

  • c) secondary active transport

Explanation

Question 24 of 25

1

Higher (than normal) intracellular concentration of Na+ will lead to:

Select one of the following:

  • a) water moving into the cell;

  • b) water moving out of the cell;

  • c) potassium moving into the cell.

Explanation

Question 25 of 25

1

Which of the following equations refers to Osmotic pressure (per Van’t Hoff):
Where: C-concentration, R-gas constant, T-temperature, V-volume, M-mass.

Select one of the following:

  • a) π = CTV;

  • b) π = MTV;

  • c) π = CRT.

Explanation

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