Review Sheet Results 1. Explain why increasing extracellular K+ reduces the net diffusion of K+ out of the neuron through the K+ leak channels. Your answer: 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 value. How well did the results compare
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a false truth to the word nerve. The courage it takes to have nerve is powerful‚ but having nerves is a weakness. A soldier in a battle needs confidence‚ and not worry or otherwise every action will be filled with doubt. The commander says‚ “No nerves‚ just have nerve out there.” The difference between the same word emphasizes the actual meaning of each word‚ creating it to be more heroic than a hero and braver than just the brave. One of the many definitions for nerve is “a person’s steadiness
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Handout Lab 5 - Cranial Nerves: Assessment of Functions INTRODUCTION The central nervous system (CNS) consists of the brain and the spinal cord. The CNS receives sensory information from other parts of the body or the body’s external environment and transmits motor information to other parts of the body by way of the peripheral nervous system (PNS). The PNS of the human includes 31 pairs of spinal nerves and 12 pairs of cranial nerves. Some nerves contain only motor nerve fibers (efferent fibers);
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1 The Effect of Molecular Weight on the Rate of Diffusion of Substances1 Alexander Ken Libranza Group 1 Sec. A – 1L March 6‚ 2012 A scientific paper submitted in partial fulfillment of the requirements in General Biology I laboratory under Prof. Cheryl M. Talde‚ 2nd sem.‚ 2011-2012. 1 2 ABSTRACT The effect of molecular weight on the rate of diffusion was assessed using two tests: the glass tube test and the agar-water gel test. In the glass tube set-up‚ two cotton plugs soaked
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The Potential Relationship Between Human Activity and Climate Change The idea of global warming has been around for over one hundred years‚ but in recent decades climate change has become a serious threat to national security. To better understand‚ global warming is defined as the gradual increase in the overall temperature of the earth’s atmosphere‚ generally recognized as the greenhouse effect‚ and is caused by increased levels of carbon dioxide‚ CFCs‚ and other pollutants‚ also known as greenhouse
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neurobiological disorder that effects about 1 and 1000 children that are born. There cause of Autism is still unknown. As of right now‚ there is no cure for autism‚ only some of its symptoms. Nevertheless‚ with proper care and medication children and adults that suffer from autism can live a full productive life. What is Autism? Autism is a developmental disability‚ also known as a Neurobiological disorder‚ that effect 1 in 1000 children. Neurobiological
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Experiment 1: Labeling (consult the Lab 3 Introduction for more details) Bacteria: Nucleoid region‚ cell wall‚ plasma membrane‚ ribosomes‚ flagella Protist: Macronucleus‚ micronucleus‚ plasma membrane‚ cytoplasm‚ contractile vacuole Plant Cell: Nucleus‚ cell wall‚ plasma membrane‚ cytoplasm‚ chloroplast‚ mitochondria‚ vacuoles Animal Cell: Nucleus‚ nucleolus‚ plasma membrane‚ cytoplasm‚ mitochondria
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occlusion) mandibular movement pattern determined by: Anterior guidance & TMJ guidance Groove rules: 1. Working grooves are at right angles to the central groove 2. Non-working grooves are usually oblique to the central groove 3. During protrusive mvmt‚ centric cusp usually moves parallel to central groove Three axis of reference for mandibular mvmt: 1. Horizonal axis: occurs in sagittal plane open/close first 20-25 mm = pure rotation 2
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Practical 2.1- The Effect of Temperature on Membranes Objective To investigate the effect of temperature on membrane structure Introduction Beetroot Pigments Beetroots contain Betalains which are the red pigments present in the cell vacuole. Betalains are soluble in water and they contain nitrogen. Betalains extracted from beetroot is commonly used as food dye because it is not known to cause any allergic reactions. Beetroot Picture taken from http://tipdeck/how-to-cook-beet-root Structure
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Cell Membranes and Transport Hands-On Labs‚ Inc. Version 42-0033-00-01 Exercise 1: Diffusion Observations Data Table 1: Rate of diffusion in different temperatures | | ºC | Minutes | Temperature | InitialTemp. | InitialColor | 5 | 10 | 15 | 20 | 25 | 30 | 60 | Cold | 10°celsius | clear | clear | clear | clear | clear | clear | light purple | light purple | Ambient | 25°celsius
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