a network of electrical activities‚ they somehow have to be interconnected. When a nerve indicator‚ or impulse‚ reaches the ends of its axon‚ it has traveled as an action potential‚ or a pulse of electricity. However‚ there is no cellular continuity between one neuron and the next; there is a breach called synapse. The membranes of the sending and receiving cells are separated from each other by the fluid-filled synaptic gap. The signal cannot leap across the gap electrically‚ so special chemicals
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The first lab will investigate the movement of glucose and starch across a selectively permeable membrane through a process of diffusion. The movement of a solute through this membrane is called dialysis . Diffusion is a form of passive transport. It is the movement of molecules from areas of higher concentration to those of lower concentration‚ until there is an even concentration. This movement is random because it is a result of kinetic energy. Diffusion is a slow process‚ but there are many factors
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its plasma membrane is affected and may change in structure resulting in the leaking of betacyanin. If the temperature changes‚ then I would expect to observe that there would be a change in the concentration of betacyanin that has leaked from a beetroot cell. In specific‚ at high temperatures‚ the phospholipids that make up the plasma membrane of the beet root cell become progressively more destabilized causing them to transform into a liquid state. As this occurs‚ the plasma membrane ruptures allowing
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NEURONAL DIVERSITY - Categories of neurons of CNS: 1. Afferent/ sensory neurons – convey information from periphery to CNS 2. Motor- sends commands to muscles and glands 3. Interneurons – most abundant signalling elements in the CNS ( process information locally or convey information from one region of CNS to another • Types: a. Local interneurons/ internuncial neurons/ local circuit neurons – short axon Golgi type II (greatly outnumber type I in CNS)
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Each main component has its own‚ individual function which helps a cell to function and maintains the cell membrane. The components that I will be describing include the cell membrane‚ nucleus‚ cytoplasm‚ mitochondria‚ lysosomes‚ Golgi bodies‚ centrioles‚ endoplasmic reticulum (both smooth and rough) and ribosomes. The cell membrane - The cell membrane is also known as the plasma membrane and is located on the surface of all typical animal cells‚ it is covered by a double layer of phospholipid
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transmit motor responses as a result of changes in membrane permeability of certain ions due to the sensory stimulus. The sciatic nerve is the most important nerve that located in spinal cord through the thigh. The sciatic nerve has many nerve fibers or axons allowing the examination of the action potentials through the movements of the nerve. The sciatic nerve axons are different in structure and function. Axons with large diameter perform action potentials faster than axons with small diameter. The sciatic
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unwanted vegetation like weeds‚ grasses‚ and broad leaf plants (http://onlinelibrary.wiley.com/doi/10.1111/j.1399-3054.1982.tb04545.x/full). The purpose of this lab is to look at different effects of paraquat toxicity which causes changes in the lipid membrane bilayer of chlorosplasts (makes it leaky) and the formation of malondialdhyde in the bean Phaseolus vulgaris‚ by isolating the choloroplast‚ determining the chlorophyll concentration‚ determinating the protein amount by making a standard curve
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has stopped‚ what cellular processes and membrane functions are going to be affected by the loss of oxygen‚ blood glucose‚ and waste removal? Without the heart pumping‚ oxygen and blood glucose won’t reach the vital organs of the body that need them for sustenance. Eventually without the ability to produce ATP the body’s cells will die. C. Which intracellular organelles have membranes as part of their structure? How would the breakdown of the membranes of these structures affect the function
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concentration as a result of random thermal motion __D___ the movement of molecules across a membrane that requires the expenditure of cellular energy (ATP) __C___ the transport of water across a semipermeable membrane ___F__ term used to describe two solutions that have the same concentration of solutes relative to one another ___B__ the movement of molecules across a selectively permeable membrane with the aid of specialized transport proteins a. diffusion b. facilitated diffusion c. osmosis
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connective tissue covering called endomysium is a muscle fiber. The plasma membrane of a skeletal muscle fiber is called the Sarcolemma In a skeletal muscle fiber‚ Ca2+ is stored within the sarcoplasmic reticulum The bundle of dense regular connective tissue that attaches a skeletal muscle to bone is called a(n) tendon. In excitation-contraction coupling‚ the transverse tubules function to conduct an action potential into the sarcoplasmic reticulum. During muscle contraction‚ the I band
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