their functions. Cells are different in size‚ shape‚ & function COMPOSITE CELL A cell has a cell membrane‚ cytoplasm‚ & nucleus ORGANELLS- perform specific functions The nucleus controls over all cell activities because it contains DNA the genetic material CELL MEMBRANE is a selectively permeable passage way. CELL MEMBRANE is made up of protein‚ lipid‚ & carbohydrate molecules Cell membrane is BILAYER of phospholipid molecules CYTOPLASM –contains organelles‚ cytoskeleton‚ suspended in CYTOSOL
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What is osmosis? Osmosis is the diffusion of water molecules through a semi permeable membrane. Why is it important? It is important to know what Osmosis is‚ and to understand it so that we understand what we are measuring‚ and so that we can use this understanding to apply to other situations so that we can gain further knowledge. We can also use this understanding to analyse our results. What we will do: We will put potato pieces of similar sizes in to test tubes of different concentrations
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the nucleus. These signals can be in the form of light‚ peptides‚ lipids‚ and sugars. Once activated by a ligand at the outer cell surface‚ GPCRs activate their cognate G-proteins that reside on the inner cell membrane. The activated G-proteins then slide along the inside of the cell membrane to activate a cascade of proteins and enzymes that in turn amplify the original message received by the GPCR. Protein scaffolds are members of the signaling cascade downstream of GPCRs. Scaffold proteins help
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Cells | Cells that do not have a nucleus or other membrane-bound organelles. | | Eukaryotic Cells | Cells that have a nucleus and other membrane-bound organelles. | | Cytoskeleton | A network of proteins that is constantly changing to meet the needs of a cell. | | Nucleus | The storehouse for most of the genetic information‚ or DNA‚ in your cells. | | Endoplasmic Reticulum | (Or the ER) is an interconnected network of thin folded membranes. | | Ribosomes | Are tiny organelles that link
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maintains the cell membrane. The main components of the cell include the cell membrane‚ cytoplasm‚ the nucleus‚ nucleolus‚ nuclear membrane‚ endoplasmic reticulum (smooth ER and rough ER)‚ mitochondria‚ Golgi apparatus‚ lysosomes‚ ribosomes and vacuoles. a) The cell membrane – The cell membrane otherwise known as the plasma membrane is located on the surface of a typical animal cell. The cell membrane is made up of a phospholipid bilayer and is a selectively permeable membrane that allows substances
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Dissolution[edit] In the most common situation‚ a tablet is ingested and passes through the esophagus to the stomach. The rate of dissolution is a key target for controlling the duration of a drug’s effect‚ and as such‚ several dosage forms that contain the same active ingredient may be available‚ differing only in the rate of dissolution. If a drug is supplied in a form that is not readily dissolved‚ the drug may be released more gradually over time with a longer duration of action. Having a
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Osmosis is a type of diffusion. It involves movement of water through a differentially permeable membrane from a region of high concentration (of water molecules) to a region of lower concentration (of water molecules). We define 3 types of solutions based upon osmotic activity. In an isotonic solution‚ the solute concentration is the same on both sides of the membrane so there is no net movement of water. ( See Figure 1) In a hypotonic solution‚ solute concentration
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MDIS Foundation Certificate in Biomedical Sciences Name : Student ID/NRIC/FIN: Batch : Lab Group : Date : 27th July 2012 |Total Marks Scored | | ‘Father of Chemotherapy’ Chemotherapy is the use of chemical matters to cure diseases (1). The origins of chemotherapy is attributed to Paul Erhlich‚ a Nobel Laureate in Medicine (1814-1915)‚ who is recognized as the ‘Father
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(A) Hydrophilic Head- This head is attracted to water‚ so it faces outward to protect the cell from water. We used red “puff balls” because they resemble the hydrophilic head through the shape. (B) Hydrophobic Tail- These tails are like to stay away from water‚ so they face inward. We used green pipe cleaners because they resemble hydrophobic tail by the way they can bend and be easily shaped. (C) Ion Channel- Ions channels transport polar atoms like‚ Na+‚ K+‚ Ca++‚ and Cl-‚ in and out of the cell
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egg is placed in a container with vinegar solution 2. A bubble from the water is beginning to emerge. ( but not a lot) | 15.24cm | 24 | 1. The hard egg shell is being dissolved 2. The egg is still inside the inner part of the membrane | 16.51cm | 48 | 1. The egg shell is really soft 2. After some hours I saw the shell it has completely dissolved | 17.78cm | 72 | 1. I have recorded growth on the egg its self 2. The egg is no were near
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