Amoeba sisters inside the cell membrane worksheet answers

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Amoeba sisters inside the cell membrane worksheet answers

Look at the large windows and glass doors in this house. Imagine all the light they have to enter a sunny day. Now imagine living in a house that has the walls without any windows or doors. Nothing could enter or exit. Or imagine living in a house with holes in the walls instead of doors and windows. Things could enter or exit, but you could get control what has come upon or leaving. Only if a house has the walls with windows and doors that can be opened or closed you can check what comes into or comes out. For example, windows and doors allow you to leave in dog light and family and hold rain and insects. Figure (PageIndex {1}): a house with windows if a cell were a house, the plasma membrane would be walls with windows and doors. Moving things inside and out the cell is an important role in the plasma membrane. It controls everything that comes into and comes out of the cell. There are two basic ways that substances can cross the plasma membrane: passive transport, which does not require energy; and active transport, which requires energy. Passive transport is explained in this section and active transport is explained in the next section, active transport and homeostasis. Various types of cell transportation are summarized in the conceptual map of the figure (PageIndex {2}). Passive transport occurs when the substances cross the plasma membrane, without any supply of energy from the cell. No energy is necessary because the substances are moving from an area where they have a greater concentration to an area where they have a lower concentration. Aqueous solutions are very important in biology. When water is mixed with other molecules this mixture is called a solution. Water is the solvent and the dissolved substance is solute. A solution is characterized by solute. For example, water and sugar would be characterized by a sugar solution. Other particles of a soluto in a given volume, the greater concentration. The soluto particles always move from an area where it is more concentrated in an area where it is less concentrated. It is a bit like a ball that rolls down from a hill. It goes from S? ?, without any additional energy intake. The different cell transport categories are shown in the figure (pageIndex {2}). The transport of cells can be classified as follows: passive transport that includes simple diffusion of osmosis facilitated displacement active transport can lead to both a pump or a pump transport vesicle can be vesicle transport can involve introcytous exocytosis that includes phagocytosis pistocytosis mediated by endocytous receptors figure PageIndex {2}: The Cell Transport Concept Map illustrates various types of cell transport that will happen to the plasma membrane spread even if you can't know what the spread is, you have experienced the process. Can you remember walking in the front door of your home and smelling a nice scent from the kitchen? It was the spread of particles from the kitchen to the entrance door of the house that allowed you to detect odors. Diffusion is defined as the net movement of particles from a greater concentration area to a minor concentration area. Figure (pageIndex {3}). Simple spreading shows as a timeline with the outside of the cell (extracellular space) separated from inside the cell (intracellular space) from the cell membrane. At the beginning of the timeline there are many molecules outside the inside of the cells and none. Over time, they spread in the cell until it is an external amount and the same internal. The molecules of a gas, a liquid or a solid are constantly moving due to their kinetic energy. Molecules are constantly movement and collide with the other. These collisions cause molecules to move in random directions. Over time, though, more molecules will be driven in the least concentrated area. So, the net movement of molecules is always from the more dense areas to less thick areas. Many things can spread. Odors spread through the air, salt salt Through water and nutrients spread from blood to body tissues. This diffusion of particles through the random movement from a high concentration area to a lower concentration area is known as a diffusion. This uneven distribution of molecules is called a concentration gradient. Once the molecules become evenly distributed, there is a dynamic balance. The balance is said to be dynamic because the molecules continue to move, but despite this change, there is no clear change in concentration over time. Both living and non-living systems experience the dissemination process. In living systems, diffusion is responsible for the movement of a large number of substances, such as gas and small molecules not charged, inside and out of the cells. Osmosis is a specific type of diffusion; It is the passage of water from a region to a high concentration of water through a semi-permeable membrane to a region of concentration of low water. Water moves inside or out of a cell up to its concentration is the same on both sides of the plasma membrane. Semipermeabeable membranes are very thin layers of material that allow some things to go through them but prevent the other to go through. The cell membranes are an example of semipermeable membranes. Mobile membranes allow small molecules such as oxygen, water and oxygen carbon dioxide to go through but do not allow larger molecules such as glucose, sucrose, protein, and starch to directly access the cell. The classic example used to demonstrate osmosis and osmotic pressure is to the cells immerse yourself in sugar solutions of various concentrations. There are three possible relationships that cells can meet when they are placed in a sugar solution. Figure (PageIndex {4}) Show what happens in osmosis through the semi-permeable cell membrane. The concentration of soluto in the solution can be greater than the concentration of solute in cells. This cell is described as being in a hypertonic solution (hyper = greater than normal). The net or water flow will be out of the cell. The solutile concentration in the solution can be equal to the concentration of soluto in cells. In this situation, the cell is in an isotonic solution (ISO = equal to or equal normal). The quantity of water that enters the cell is equal to the amount of leaving the cell. The solutile concentration in the solution can be lower than the concentration of soluto in cells. This cell is in hypotonic solution (IPO = lower than normal). The net water flow will be in the cell. Figure ({pageIndex 4.a}): hypertonic solution. A solution that has a higher solute concentration another solution. Water particles move out of the cell, causing chenation. Figure (PageIndex {4.B}): Isotonic solution. A solution that has the same concentration of the solute as another solution. There is no net movement of water particles, and the overall concentration on both sides of the cell membrane remains constant. Figure (PageIndex 4.c}): hypotonic solution. A solution that has a lower solute concentration another solution. Water particles will move into the cell, causing the cell to expand and finally lisare. Figure (PageIndex {5}) demonstrates the specific results of osmosis in red blood cells. Hyperton solution. The red blood cell will appear to shrink like water flows out of the cell and the surrounding environment. Isotonic solution. The red blood cell will keep its normal form in this environment as the amount of water that enters the cell is equal to the amount of leaving the cell. Hypotonic solution. The red blood cell in this environment will become Swollen and potentially rupture as the water falls into the cell. Figure (PageIndex {5}): Osmosis demonstration with Red Blood Cells placed in a hypertonic, isotonic, hypotonic solution. Water and many other substances cannot simply spread through a membrane. Hydrophilic molecules, loaded ions, and relatively large molecules such as glucose all need need With diffusion. The help comes from protein ?

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