Diffusion and Osmosis Experiment Materials
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Questions and Answers

The % of glucose solution used is ______

40

Diffusion and Osmosis occur through ______ membranes

Nonliving

The Benedict's solution is stored in a ______ bottle

dropper

The vials of mammalian blood are obtained from a biological supply house or ______

<p>veterinarian</p> Signup and view all the answers

Molasses is added to approximately 5 cm above the thistle tube ______

<p>bulb</p> Signup and view all the answers

The level of the molasses in the tube is marked with a wax ______

<p>pencil</p> Signup and view all the answers

Transport through the plasma membrane occurs in two basic ______

<p>ways</p> Signup and view all the answers

There are many examples of diffusion in ______ systems

<p>nonliving</p> Signup and view all the answers

Potassium per manganate crystals are placed in a 1000 - ml graduated cylinder, and distilled water is added slowly and with as little turbulence as possible to fill to the 1000 - ml mark. Because of its molecular composition, the plasma membrane is selective about what passes through it. It allows nutrients to enter the cell but keeps out undesirable substances. By the same token, valuable cell proteins and other substances are kept within the cell, and excreta or wastes pass _________

<p>passively</p> Signup and view all the answers

The two important passive processes of membrane transport are ________ and filtration. Diffusion is an important transport process for every cell in the body. By contrast, filtration usually occurs only across capillary walls.

<p>diffusion</p> Signup and view all the answers

Molecules possess kinetic energy and are in constant motion. As molecules move about randomly at high speeds, they collide and ricochet off one another, changing direction with each collision. A concentration gradient is present when molecules are unevenly distributed, resulting in an area of higher concentration and an area of lower concentration. Diffusion is the movement of molecules from a region of their higher concentration to a region of their lower concentration. Because the driving force for diffusion is the kinetic energy of the molecules, the speed of diffusion depends on ________

<p>molecular</p> Signup and view all the answers

Because of its molecular composition, the plasma membrane is selective about what passes through it. It allows nutrients to enter the cell but keeps out undesirable substances. By the same token, valuable cell proteins and other substances are kept within the cell, and excreta or wastes pass _________

<p>through</p> Signup and view all the answers

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