molecules spread faster and faster. The opposite would be true of colder temperatures. 3. Considering the osmosis lab‚ explain the relationship between fluid volume and osmotic pressure. Answer: Osmotic pressure is the measure of the tendency for osmotic flow to occur. Osmotic flow is from a solvent to a solution. This is the amount of pressure that needs to be applied from the outside to prevent osmosis. Fluid volume might be connected to osmotic pressure as the amount of pressure required to contain
Premium Osmosis Diffusion Molecular diffusion
concentration. It’s also the main method by which small molecules move across the cell membrane. Since molecules are always moving and bumping into each other‚ the more molecules are in an area‚ the more collisions there will be. These collisions cause molecules to push away from each other. So‚ over time‚ the molecules of a substance will continue to spread out. Eventually‚ they will be spread evenly throughout the area. Osmosis is the diffusion of water. (when “the substance” that is diffusing is water)
Premium
Osmosis in potato cells Aim: To view and examine the effect different concentrations of sucrose solution has on the movement of water across the cell membrane. Hypothesis: That the potatoes will either increase or decrease in mass‚ due to the effect of the different concentrations. Osmosis will occur. Apparatus: * Fresh potatoes * Apple corer * Scalpel * Petri dishes X 10 * 50ml measuring cylinder * Distilled water * Paper towelling * Sucrose solutions:
Premium Concentration Osmosis Solution
Introduction: The purpose of this lab was to observe passive transport of molecules through diffusion and osmosis. We had to keep close observation on two dialysis bags and explain how we measured the change in weight as diffusion and osmosis occurred throughout the experiment. Cells produce an energy called Kinetic Energy. This causes molecules of the cell to move around and bump into each other. Diffusion is one result of this molecular movement. Diffusion is the passive movement of molecules
Premium Osmosis Chemistry Diffusion
Cell Specialisation All cells are designed to perform a particular job within an organism‚ that is‚ to sustain life. Cells can become specialized to perform a particular function within an organism‚ usually as part of a larger tissue consisting of many of the same cells working together for example muscle cells. The cells combine together for a common purpose. All organisms will contain specialised cells. There are hundreds of types of specialised cells. Below is listed some of the major ones
Premium Cell Cell nucleus Gamete
Social System Course Guide‚ 1993). Homeostasis refers to the body ’s ability to keep the internal chemical and physical environments constant. As your body begins to react to stress several changes occur. These changes include increased heart rate‚ blood pressure and secretion of stimulatory hormones. Ones body prepares itself in stressful situations to either stand ground and fight or to flee from the situation. Walter Cannon called this stressful reaction the fight-or-flight response (Greenberg‚
Premium Blood Heart Immune system
Red Cross - It is an international organization concerned with the alleviation of human suffering and the promotion of public health; the world-recognized symbols of mercy and absolute neutrality are the Red Cross‚ the Red Crescent‚ and the Red Crystal flags and emblems. - It is an international humanitarian organization (Red Cross Society) formally established by the Geneva Convention of 1864. It was originally limited to providing medical care for war casualties‚ but its services now include
Premium Blood type Blood
Hormones can react to increase blood pressure when it becomes low‚ the sympathetic division of the autonomic nervous system uses several ways to temporarily increase blood pressure when it has dropped for example during the fight or flight response. During the response‚ the sympathetic division is needed to stimulate the adrenal glands to release the hormones epinephrine and norepineprine which stimulate the heart to beat faster and for blood to flow more forcefully‚ this effect makes most of the
Premium Blood pressure Blood Cardiovascular system
The Misunderstood Option of Cord Blood Banking Despite the benefits of using umbilical cord blood stem cells for transplant‚ the process also has some disadvantages. Today‚ more than 20 years after the first successful umbilical cord blood stem cell transplant‚ more families are seeking information about whether or not to invest in saving their newborn’s umbilical cord blood. Cord blood banking is not a routine procedure you have to choose and plan ahead of time‚ usually in second trimester of
Premium
Evolution of Sickle Cell Sickle Cell was discovered in the United states although it originated in Africa . The sickle cell disease (SCD) describes traits of an inherited red blood cell disorder‚ having SCD means you have abnormal hemoglobin‚ called hemoglobin S or sickle hemoglobin‚ in your red blood cells. What is hemoglobin u might ask?! Well Hemoglobin is a protein in red blood cells that is suppose to carry oxygen throughout the body. But when a sickle cell trait is “Inherited” it could
Premium Malaria Red blood cell Sickle-cell disease