Name the waste product which is produced by the stem of conifers. What is the advantage of presence of two kidneys in man? When the water content is balanced, the of the body fluids is balanced. Amino acid to Glycogen 9. Which one of the following animal can survive without drinking water? It will help you prepare better for your test. Give the technical term for the process of expelling of urine. Excretion: O Level Biology Multiple Choice Questions and Answers 1 , learn online 1 for certificate programs online courses.
It is commonly known as vasopressin Question 4 4. When you have completed the practice exam, a green submit button will appear. Summary — Excretion vs Osmoregulation Excretion is the removal process of harmful and unnecessary substances from the body. However, when the water balance is achieved, these fluids will not become too diluted or too concentrated. What is the main aim of excretion? Loop of Henle is the hairpin shaped section of a kidney tubule situated between the proximal and distal tubules in the nephron. Excretion is the process of removing toxic substances, metabolic waste products, excess water, non-useful products, etc from the body. A tuft of capillaries present in the cavity of Bowman's capsule.
Write about the various waste products produced by the plants. The body has a very small store of glycogen that can provide glucose for about 36 hours, then the body must make its glucose. During total starvation with no food being eaten, the body must rely on its own tissues to provide the essential mixture of fuels to sustain life. Exam Instructions: Choose your answers to the questions and click 'Next' to see the next set of questions. Animal cells do not have a wall; therefore high turgor pressure causes their bursting. The liver cells continuously release urea into the blood and kidneys withdraw it from the blood to excrete it in urine. Name the phenomenon of removing of waste product from the body.
Differentiate between excretion and osmoregulation. They allow water and small molecules in the blood to pass through them. When dietary proteins increase significantly, enzyme concentrations rise. It is the process of maintaining the water balance of the body. It is a vital process occurs in all living organisms to maintain a healthy life. Click it to see your results.
Reabsorption of Na 1 brings about the uptake of an osmotically equivalent amount of water. Name the excretory matter in : a Fishes d Birds b Tadpole e Human c Frog f Earthworm 3. Practice kidneys as osmoregulators, what is excretion, structure of nephron career test prep for online biology courses distance learning. Animal cells do not have a wall; therefore high turgor pressure causes their bursting. Where is the urine carried through ureters? Citrulline combines with another molecule of ammonia and forms arginine essential amino acid and water.
However, when the water balance is achieved, these fluids will not become too diluted or too concentrated. Glucose is taken back from glomerular filtrate through a active transport b passive transport c osmosis d diffusion. Fresh water protozoans pumped out excess water by a special structure called; a. There is no reabsorption of useful substances 6. Nephron is the structural and functional unit of kidney. The latter opens into one of the collecting ducts.
This protein stimulates the adrenal cortex to produce aldosterone which acts on the cells of the ascending limb of the loop of Henle, and increases the rate of reabsorption of Na +. Organisms regulate the osmotic pressure of their body fluids to maintain the water balance in order to prevent body fluids becoming too diluted or too concentrated. Osmoregulation is the maintaining of the water balance of the body fluids. Question 5 Question: What is secretion? Osmoregulation is a type of balancing the uptake and loss of water. What is the main drawback of artificial kidney? Osmoreceptors in the detect the changes in the water balance or the concentration changes of the blood and body fluids.
If the red blood cells are placed in a hypotonic solution, one in which the concentration of solutes is less and concentration of water is greater than inside the cells, they will take up water by endosmosis to equalize the water concentration, swell up and may burst. A kidney contains about a million nephrons, each approximately 3 cm. The mammals, birds, and flowers so familiar to us are all relatively recent, originating 130 to 200 million years ago. Give the technical term for the dialysing machine. Name three parts of nephric tubule. Through homeostasis, organisms balance the temperature, water content, pH, concentration of , etc within their internal body environment even though the external environmental factors have fluctuated higher beyond the balance points. Excretion is the process of eliminating the metabolic wastes and non-useful materials from the body.
This is called urea or ornithine or Krebs- Henseleit cycle after the names of its discoverers. Name the tube which passes out urine from urinary bladder. All organisms have mechanisms to regulate water balance in their bodies. Brassica and rose plant belong to group of plants; a. They have abundant mitochondria and bear numerous microvilli on the free side thus giving brush border appearance.