Neurophysiology of Nerve Impulses ACTIVITY 1 The Resting Membrane Potential 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. If the extracellular K+ increases then the concentration of intracellular K+ will decrease causing a decrease in the steepness of the concentration gradient and fewer K+ ions would be drawn out. 2. Explain why increasing extracellular K+ causes the membrane potential to change to a less negative
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Defn. of Digestion: the process whereby a biological entity processes a substance‚ in order to chemically convert the substance into nutrients. It usually involves mechanical manipulation and chemical action. Mechanical Digestion What is it? This type of digestion involves the mixing‚ grinding or crushing of large pieces of food into smaller places. Why does it take place? So that the food we consume is broken down into smaller pieces before we swallow it which in turn makes process of
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EXPERIMENT 13 DIGESTION IN THE SMALL INTESTINES ------------------------------------------------- ABSTRACT The small intestine serves as the site of major digestive and absorptive processes. In this experiment‚ the action of pancreatic enzymes on representative samples of each food group under different conditions‚ such as increased/decreased pH and presence of other substances‚ were observed. A pancreatin solution was first prepared from a hog pancreas and was completely neutralized using
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plunger before removing the needle. 6. (Optional) If required by the company‚ place the cure adapter over the connector ferrule. 7. Feed the optical fiber through the connector while ensuring the strength member fans back as the fiber is pushed forward. 8. Crimp the connector using crimpers (follow manufacturer’s data sheet). 9. Place the connector in the curing over and follow the manufacturers’ cure schedule for curing the epoxy. 10. Once epoxy has cured‚ remove the connector and allow it to cool. Proceed
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Question 7 of 9 10.0/ 10.0 Points Where is the major trough over the US in the image below? A.over the Great Plains of the US B.There is no trough in the image. C.over the west coast of the US D.over the southeast US. Answer Key: A Question 8 of 9 10.0/ 10.0 Points In the image of dewpoint temperatures below‚ what region will have enough moisture to sustain severe weather? A.Southeast US northward to Iowa. B.Central Texas C.All of Kansas and Colorado. D.New
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ACTIVITY 1: THE RESTING MEMBRANE POTENTIAL 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out the neuron through the K+ leak channels? When the diffusion is greater on one side‚ the other side will slow down. 2. Explain why increasing extracellular K+ causes the membrane potential to change to a less negative value. How well did the results compare with your predictions? There are two potassium’s for every sodium so the increase of potassium will make it more
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Digestion/ Absorption and Homeostasis In order to survive‚ our bodies must bring in energy and nutrients for the cells of the body through eating and digestion of food. To be carried to the cells of the body by the blood stream‚ food must be broken down to molecules. This breaking down of food into molecules‚ small enough to be absorbed into and carried through the blood stream‚ is carried out by the digestive system through the process of digestion and absorption. Digestion is the process of
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DIGESTION IN THE MOUTH: Food is mechanically cut by incisors and canines‚ chewed by molars and premolars‚ and mixed with saliva by the tongue. The saliva has been produced by salivary glands‚ which pour it into the mouth through salivary ducts. This process of introducing food into the mouth is called ingestion. Chewing breaks food into smaller particles so that chemical digestion can occur faster. This cutting and mixing is called mastication. Moreover‚ food is chemically digested by salivary
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11 Digestion 1 Which one of the following structures is not part of the alimentary canal? (a) duodenum (c) liver (b) mouth (d) stomach: 2 Name two digestive glands. 3 What name is given to the muscular contraction which moves food along the alimentary canal? 4 What do digestive enzymes do to food? 5 What are the final digestion products of (a) protein‚ (b) fat‚ (c) starch? 6 How does chewing food help to speed up digestion? 7 Name the enzyme
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Session 1- PhysioEx Exercise 11—Kyle 1. List the following values from Chart 1: Hematocrit value for healthy male living at sea level in Boston 48 Hematocrit value for healthy female living at sea level in Boston 44 2. Were the values listed in question 1 within normal range? Yes 3. Describe the difference between the male and the female hematocrit for an individual living in Boston. The secretion of erythropoetin from the kidneys stimulates testosterone in males. Erythropoetin makes
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