Exercise 1: Cell Transport Mechanisms and Permeability Worksheet. Simple Diffusion Activity 1: Simulating Simple diffusion 1. What is the molecular weight of Na+? 22.99 2. What is the molecular weight of Cl-? 35.45 3. Which MWCO dialysis membranes allowed both of these ions through? 50‚ 100‚ 200 4. Which materials diffused from the left beaker to the right beaker? Na+/Cl-‚ Urea‚ Glucose 5. Which did not? Why? Albumin did not diffuse from the left to the right beaker. The conclusion
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from a high concentration to low concentration. Diffusion is form of passive transport as energy does not need to be generated. Diffusion is complete when the concentration of molecules is equal on either side of the membrane. Diffusion rate can be influenced by many factors such as: Concentration gradient across the the membrane. Permeability of the membrane to the diffusing substance. Temperature. Surface area of the membrane. Question 2 2.1 Acetylcholine is an organic chemical that functions in the
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Neurons are cells used to perceive the outside environment‚ the internal environment within themselves‚ to formulate behavioral response to those signals‚ and to send that information to other neurons‚ muscles‚ or glands. All information comes into a neuron through the dendrite‚ flows through the neuron and then leaves to go to the next neuron through the axon. Neuron communication does not rely on a single entity but entrusts several different processes that involve the contribution of neuron structure
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Gahan The Vertebrate Endocrine System in specific reference to their role in Human Menstruation‚ Ovarian and Uterine cycles Rio Summers April 2009 Word Count: 2693 The vertebrate endocrine system can be best explained as an internal body system collecting multiple organs and glands that produce and regulate hormone secretion into the bloodstream in order to control the many functions of the body. The endocrine system functions alongside the nervous and exocrine system to control and maintain growth
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Plan:- Independent Variable- Temperature is what I will be changing in the experiment. I want to find out what effect temperature has on the permeability of a cell membrane. Controlling other Variables- I will use measures to ensure that everything stays the same in my test to gain the best and most reliable results possible - Same volume of water that I put the beetroot into after heating. - The beetroot I use will be the same size each time‚ I will ensure this using a cork borer. - The beetroot
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Analysis 1- Mirror neurons are cells that are actively firing both during a movement and while witnessing another perform the same movement. This can give insight into why sports fans get so worked up while watching a game. They are acting out; imitating what they see because the body is priming them. Their action neurons are firing just by watching‚ Kind of a monkey see monkey do scenario. The witnessing individual is adopting the other individuals’ point of view. 2- Mirror neurons contribute to feelings
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to turn. This ability to understand and relate to another individual’s internal state has provided great motivation for research. One source of explanation arose from research on mirror neurons-which fire both during execution and observation of a behaviour (Rizzollati & Arbib‚ 1998). This particular class of neurons plays a crucial function in human social interactions. The importance of the mirror neuron system (MNS) for communication can be understood through its influence on nonverbal communication
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The Science of Transportation: Ancient World: The Wheel: • How do they work? Wheels work by rolling along a surface. The curved surface of the wheel reduces the friction between the two surfaces due to a decrease in surface area. With less friction it is much easier to move an object. This is because rolling friction is much weaker than sliding friction. • How did they come to be? The wheel was invented in prehistoric times; as the oldest example of a wheel yet found is from the region of
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Determination of Cleansing Action of Detergents (Using Capillary rise) Synopsis This project report explains about the surface tension and capillarity of liquid through a simple experiment of finding the capillarity of various detergents. Oil stains and grease on dirty clothes cannot be removed‚ using water alone‚ because water does not wet them. If detergents added ‚ surface tension is decreased‚ the area of contact is increased
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Exercise 1: Cell Transport Mechanisms and Permeability: Activity 4: Simulating Filtration Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. Filtration is a process that You correctly answered: c. is passive. 2. Filtration is dependent upon a You correctly answered: b. hydrostatic pressure gradient. 3. The filtrate You correctly answered: d. All of these answers are correct. 4. An important place that filtration takes place in the body is in You correctly
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