Select all that applyAccording to Fick's law, what variables are important in the diffusion of a gas across cellular membranes?Multiple select question.The partial pressure of all the other gases on both sides of the membraneThe difference in the concentration of the gas on both sides of the membraneThe thickness of the membraneThe amount of oxygen binding proteins on both sides of the membrane

Fick's law of diffusion states that the rate of diffusion is directly proportional to theMultiple choice question.size of the molecules.distance across which diffusion occurs.pressure difference.

Select all that applyWhich of the following are ways in which the rate of diffusion of a gas across a membrane can be increased?Multiple select question.By decreasing the distance across which diffusion is occurring.By increasing the surface area of the membrane.By increasing the volume of gas on each side of the membrane.By decreasing the pressure difference between the two sides of the membrane.

How do gases move across the plasma membrane and other cellular membranes?Multiple choice question.By facilitated diffusionBy passive diffusionThrough specialized gas channelsBy active transport

What is diffusion?The passive movement of particles from a high concentration to a low concentrationThe passive movement of particles from a low concentration to a high concentrationThe active movement of particles using energy from respirationThe passive movement of water though a semi-permeable membrane from an area of high concentration to an area of low concentration2Which of the following factors do not speed up diffusion?Small surface area to volume ratioIncrease in temperatureIncrease in concentration gradientLarge surface area to volume ratio3During ventilation, in which order does air enter the following structures to reach the lungs?Bronchi, bronchiole, trachea, alveoliTrachea, alveoli, bronchi, bronchioleTrachea, bronchi, bronchiole, alveoliBronchi, trachea, bronchiole, alveoli4Which one of the following characteristics would you expect to find in alveoli to make them efficient at gas exchange?Small surface areaRich supply of blood capillariesLong diffusion distanceThick walls5Which two mechanisms are important for maintaining the steep concentration gradients of oxygen and carbon dioxide that are necessary for gas exchange?Respiration and ventilationVentilation and circulationVentilation and excretionRespiration and circulation6During gas exchange:Oxygen moves down a concentration gradient from the air in the alveoli to the bloodOxygen moves down a concentration gradient from the blood to the air in the alveoliOxygen moves up a concentration gradient from the blood to the air in the alveoliOxygen moves up a concentration gradient from the air in the alveoli to the blood

Which of the following gases has the lowerst rate of diffusion under the same conditions of temperature and pressure? [H = 1, O = 16, Ne = 20, CI = 35]A. ChlorineB. HydrogenC. NeonD. Oxygen