Ions‚ atoms and molecules are constantly in random motion; this is mainly marked in liquids and gases as they are further apart. When there is a small amount of molecules of a substance in an area and a large number is another area and they have no barrier between them the random motion causes numbers to even up; this is called diffusion. Diffusion is when molecules move from a high concentration to a low concentration. The concentration gradient is when the concentration is different for each
Premium Protein Diffusion Cell
Discuss the movement (of substances) inside cells Substances can travel from inside the cell out and from outside of the cell inwards across a membrane. Movement of substances also occurs inside the cell and is part of many of the processes that occur inside cells in both eukaryotic and prokaryotic cells as well as animal and plant cells. The movement of substances may occur across a semi-permeable membrane such as the phospholipid bilayer membrane on the outside of a cell in the digestive
Premium Cell Cell membrane Bacteria
Excretory System Review Main Concepts: Describe the major gross anatomical structures of the excretory system. Kidneys: receive about 25% of the cardiac output; produce urine (a fluid containing water‚ ions‚ and small soluble compounds) Ureters: receive urine from the kidneys and conduct it to the urinary bladder. Urine movement involves a combo of gravity and the peristaltic contractions of smooth muscle in the walls of the ureters Urinary Bladder: receives and stores urine prior to elimination
Premium Nephron Kidney
Urinary System The main structures that make up the urinary system are two kidneys (contains nephrons)‚ two ureters‚ one bladder‚ one urethra‚ arteries and veins. The Ureter connects the kidney to the bladder. The bladder is storage for urine. Urine is excreted to the outside of the body through the urethra. Kidney The kidneys are two bean-shaped organs located outside the peritoneum at the posterior of the upper abdomen. The kidneys are located one on each side of the vertebral columns and are protected
Free Kidney Nephron
OUR WATER WISE BIO CERAMIC SYSTEM: BIO CERAMIC UNIT WITH BUILT-IN ELECTRONIC BOOSTER PUMP Your water pressure must be between 2‚5 and 6 BAR for reverse osmosis systems to function. Usually municipal pressure is more than adequate and this system is only required where water pressure is below 2‚5 BAR for example where water tanks are used. BACKGROUND Why do you need pure water? Water is so basic that it is often taken for granted! Pure water is not a just a basic need‚ but also a necessity
Premium Water Osmosis Chemistry
filtered by the kidneys each minute‚ only I ml (that’s less than I%) turns into urine that will eventually leave the body (after approximately 300 - 400 mis of it accumulates to fill the bladder!) That leaves 119 ml of fluid called filtrate to be returned back to the blood stream. Good thing‚ otherwise you would have to micturate (pee‚ urinate) once every 3 minutes and drink 1 L of fluid every 10 minutes in order to maintain Homeostasis!!! The one million nephrons in each human kidney are amazingly
Premium Nephron Kidney
system consists of two kidneys that filter the blood‚ two ureters‚ a urinary bladder‚ and a urethra to convey waste substances to the outside. 17.2 Kidneys (Fig. 17.2) A. The kidney is a reddish brown‚ bean-shaped organ 12 centimeters long; it is enclosed in a tough‚ fibrous capsule. B. Location of the Kidneys 1. The kidneys are positioned retroperitoneally on either side of the vertebral column between the twelfth thoracic and third lumbar vertebrae‚ with the left kidney slightly higher than
Free Kidney Nephron
Diffusion and Osmosis Diffusion The exchange of substances between cells and the environment occur in ways that require metabolic energy (active transport) and in ways that do not (passive transport-Energy from natural‚ inbuilt motion of particles). Diffusion is an example of passive transport. Diffusion is the net movement of molecules or ions from a region where they are more highly concentrated to one where their concentration is lower. Figure 1 Figure 2 Diffusion is only
Premium Cell membrane Cell Osmosis
The walls of duct in the kidney respond to ADH and the cells in the walls have membrane-bound receptors for ADH‚ to which the ADH binds to these receptors and causes a chain of enzyme-controlled reactions in the cell. The completion of these reactions is inserting vesicles containing
Premium Osmosis Hypothalamus Oxytocin
9.2 - Maintaining a Balance: 1. Most organisms are active within a limited temperature range: * Identify the role of enzymes in metabolism‚ describe their chemical composition and use a simple model to describe their specificity in substrates: * Role of enzymes in metabolism: * Metabolism refers to all the chemical reactions occurring in organisms * Enzymes are biological catalysts which increase the rate of chemical reactions * Without enzymes‚ metabolism
Premium Blood Carbon dioxide