Selectively Permeable Membrane

The Plant Cell
The Plant Cell
The Plant Cell Cell Wall Size: Around 1 Basic Function: * Hold the shape of the cell. * Strengthen the cell. Covering the cell membrane of the plant cell, there is the cell wall. The cell wall is composed of two layers of rigid, hard cellulose embedded in compounds like pectin and lignin. Pores in the cell wall allow molecules to pass through. The cell wall has two parts. The primary cell wall is formed during the growth of the cell. After the cell has stopped growing, a secondary cell wall fo
The Plant Cell
The Plant Cell
The Plant Cell Cell Wall Size: Around 1 Basic Function: * Hold the shape of the cell. * Strengthen the cell. Covering the cell membrane of the plant cell, there is the cell wall. The cell wall is composed of two layers of rigid, hard cellulose embedded in compounds like pectin and lignin. Pores in the cell wall allow molecules to pass through. The cell wall has two parts. The primary cell wall is formed during the growth of the cell. After the cell has stopped growing, a secondary cell wall for
Osmosis and Diffusion in Plant and Animal cells
Osmosis and Diffusion in Plant and Animal cells
Osmosis and Diffusion in Plant and Animal cells A) 4. The cell membrane of a plant in a hypotonic solution expands and in a hypertonic solution, the cell membrane shrinks. 5. Cells do not burst when placed in a hypotonic solution because the cell wall does not give way. The cell wall is a strong wall to keep the structure of the cell. B) 2(a). Nothing happened to the blood cell in a botanic solution (b). When water is added to the blood cells the cell membrane expands and sometimes bursts (c). W
Plant And Animal Cells
Plant And Animal Cells
Plant And Animal Cells I. Introduction All organisms in life are composed of at least one or more cells. Cells are the basic units of life. There are three main features of a cell. First, all organisms consist of one or more cells. Second, cells are the smallest units of life and third, cells arise only from preexisting cells. These three facts are referred to as the cell theory. All cells can be categorized into two basic cell types. They are prokaryotic and eukaryotic. To distinguish where cel
What Are The Major Components of Biological Membranes And How Do They
What Are The Major Components of Biological Membranes And How Do They
What Are The Major Components of Biological Membranes And How Do They Contribute To Membrane Function?. Summary. The role of the biological membrane has proved to be vital in countless mechanisms necessary to a cells survival. The phospholipid bilayer performs the simpler functions such as compartmentation, protection and osmoregulation. The proteins perform a wider range of functions such as extracellular interactions and metabolic processes. The carbohydrates are found in conjunction with both
The Effect of Concentrations of Starch and Sugar Solutions on Syntheti
The Effect of Concentrations of Starch and Sugar Solutions on Syntheti
The Effect of Concentrations of Starch and Sugar Solutions on Synthetic Semi- Permeable Membranes By: Jamie Hardy Question: Is dialysis tubing selectively permeable? Hypothesis: If one has dialysis tubing, which is dipped in water, filled with Gatorade and starch and is left for 15 minutes, the sugar in the Gatorade will exit the dialysis and into the water. So the dialysis is semi-permeable. Materials: 16 cm dialysis tubing beaker cylinder test tubes transfer pipettes Gatorade Starch solution 1
Tuber Cells
Tuber Cells
Tuber Cells DETERMINATION OF THE WATER POTENTIAL OF POTATO TUBER CELLS. Method. Five sucrose solutions with varying molarity and one control containing distilled water were prepared and poured into test tubes. The potato discs were dried, weighed and added to the test tubes. The discs were then weighed again after a period of 24 hours. The percentage change in mass was then calculated. Apparatus. #61623; Specimen tubes with stoppers x6 #61623; 1cm3 diameter cork borer #61623; razor blade #61623;
Phencyclidine The Dawn of a New Age
Phencyclidine The Dawn of a New Age
Phencyclidine: The Dawn of a New Age April, 1956 : The pharmaceutical company Parke & Davis first synthesize what they believe to be the perfect anesthetic (Souza, 1995). When administered to patients, it causes a completely dissociative state, with no significant respiratory or cardiovascular depression. Patients appear to be awake, eyes open, breathing normally.but are unaware of their surroundings or the procedures being performed upon them (Souza, 1995). Indeed, this is the perfect drug. Unf