Cell Membrane And Its Effect On Our Body - 858 Words

Part One Neurons are throughout our entire body and are what allow our central nervous system and brain communicate with your whole body. Nerve impulses among motor neurons are what allow our bodies to move when we want to. A nerve impulse is an electrical signal that travels down the axon to transmit information to other neurons to allow movement. In order for a nerve impulse to be generated, a stimulus must be strong enough to cause an â€Å"all-or-nothing† response. If the signal is strong enough the reach the neuron’s threshold, then the neuron will â€Å"fire†, or send the impulse down the axon. Before this happens, the resting neuron must be polarized by having different charges on either side of the cell membrane. This is because the outside of the cell membrane is more positive due to the presence of sodium ions while the inside is more negative due to the presence of potassium ions. Normally the resting neuron has an electrochemical value of -70 mV. In order for the electrical balance to remain stable and for the cell the maintain homeostasis, the sodium/potassium moves sodium ions out of the cell and potassium ions into the cell using ATP. When the nerve impulse is generated the balance that was created by the cell membrane is reversed, causing sodium ions to go into the cell and potassium ions to leave the cell. The cell is now in a depolarized state due to a more positive charge inside the cell and a more negative charge outside the cell. This depolarization causes theShow MoreRelatedstructure and function of plasma membrane in cells1094 Words   |  5 Pagesof the plasma membrane found within and around all cells’ The plasma membrane surrounds all eukaryotic and prokaryotic cells. Eukaryotic cells have membrane bounded organelles whereas prokaryotic cells do not. The plasma membrane forms the boundary between the cell cytoplasm and the environment. Its function are to allow different environments to be established inside and outside the cell. It also controls the movement of substances into and out of the cell. The cell surface membrane which surroundsRead MoreCells, They Are The Building Block Of All Life, They Are1034 Words   |  5 PagesCells, they are the building block of all life, they are what make up the entirety of living things on Earth and without them living things would cease to exist. It is because of this that cells are considered to be the most important known unit of life and are studied so often. Cells were first observed in the mid 17th century by English physicist and microscopist Robert Hooke using on of the earliest versions of the microscope. (Biologyreference.com, 2017) Hooke’s observations led to further investigationsRead MoreEssay about writing assignment 2980 Words   |  4 Pagesï » ¿Title: Effect of Polarity In Diffusion Of Molecules Across Cellular Membrane Abstract: Cell membranes play an important role in regulating what goes in and out of the cell. Diffusion, the process of movement of substances across the cell membrane from higher concentrations to areas of lower concentration, plays an active role in the transport and the regulation through cellular membrane. Sometimes, there are cases when cells are placed in hypotonic solutions and substances will diffuse throughRead MoreAntibiotics Are Antibiotics Used For?1198 Words   |  5 Pagesproduce the desired effect of the drug – in the case of antibiotics it is a dose high enough to provide the treatment for the infection. A toxic dose is a dose which will produce toxic effects to the host. The therapeutic index is a ratio of the therapeutic dose to the toxic dose. 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There are 17 known types of H spikes and 9 types of N spikes that scientist uses to name different flu viruses suchRead MoreInformation Can Control Behavior Without Creating A Conscious Sensation1231 Words   |  5 Pagessuggest that the belief that â€Å"perception must e nter consciousness to affect our behavior is not correct.† There are many mechanisms associated with vision one being the mammalian system that has direct connections with sections of the brain accountable for consciousness. The mammalian system is the one that gives us the ability to recognize the world surrounding us. The primitive system controls eye movements focusing our attention to movements that are abrupt that happen outside of the field of visionRead MoreEnergy Is Defined As The Capacity Of Energy946 Words   |  4 Pagesplasma membrane is made up of four components. The first component is the phospholipid bilayer that consist of a hydrophilic head and a hydrophobic tail. Its function is to â€Å"help give the membrane its fluid nature† (). Also it helps the membrane to control what enters and exits cells. Cholesterol is another component whose function is to â€Å"act as a kind of patching substance on the bilayer, keeping some small molecules from getting through† (). Furthermore, cholesterol help to keep the membrane at an