Blood: Questions and Answers
explanatory Essay
1402 words
1. What is the function of the blood? What specific materials does it transport? Why are these substances important? Be specific – explain why these substances contribute to homeostasis.
Blood is composed of plasma (clear extracellular fluid) and cellular components, which consist of red blood cells, white blood cells, and platelets. Necessary body fluids, nutrients, gases, chemicals, and wastes are transported throughout the body by the blood. The functions of the blood include respiration, waste elimination, thermoregulation, nutrient delivery, immunity and defense, hormone delivery, and water and pH balance.
Blood transports oxygen from the lungs and nutrients from the digestive tract to all cells of the body. Metabolic waste products are transported from cells to sites of elimination; for example, to the lungs for removal of carbon dioxide and to the kidneys for dumping of nitrogenous wastes in urine. Blood additionally transports hormones to their target organs.
Blood regulates an appropriate body temperature by absorbing and distributing heat throughout the body and to the skin surface to support heat loss. Normal pH in body tissues is regulated by blood. Blood proteins and other blood borne solutes act as buffers to stop extreme or sudden changes in blood pH that could endanger normal cellular activities. Blood additionally acts as the reservoir for the body’s alkaline reserve of bicarbonate atoms. Proper fluid volume in the circulatory system is maintained by the blood. For example, salts and blood proteins act to stop extreme loss of fluid from the bloodstream into the tissue spaces. This results in the blood vessel fluid volume remaining ample to assist efficient blood circulation to the entire body.
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...become sticky and accumulate together. In thrombin dilution, clot formation away from the site is prevented by thrombin dilution and antithrombin presence in the plasma. The amount of activated thrombin will decline because of dilution and the activity of antithrombin, which decreases fibrin formation. Natural anticoagulants include antithrombin and heparin. Antithrombin is produced by the liver; it deactivates thrombin before it can act on fibrinogen. Heparin is secreted by basophils and mast cells; it disrupts the creation of prothrombin activation.
Sources used:
Kapoor, Anil. “Hematology/blood.” Phoenix College. PowerPoint presentation. 2014.
Kapoor, Anil. Hematology: Lesson Builder. Phoenix College. Web. 20 March 2014.
Marieb, Elaine, and Katja Hoehn. Human Anatomy & Physiology. 7th ed. San Francisco: Pearson
Benjamin Cummings, 2007. Print.
In this essay, the author
- Explains that blood type is a classification of blood; the abo bloodtype is determined by antigen presence or absence on the surface of the person’s red blood cells.
- Explains that hemostasis is the homeostatic mechanism that inhibits blood loss due to trauma or blood vessel damage.
- Explains that a platelet plug is the structure formed when platelets become sticky and clump together when they are stimulated by exposure to the underlying connective tissues.
- Explains that blood type is a classification of blood; the abo bloodtype is determined by antigen presence or absence on the surface of the person’s red blood cells.
- Explains that hemostasis is the homeostatic mechanism that inhibits blood loss due to trauma or blood vessel damage.
- Explains that a platelet plug is the structure formed when platelets become sticky and clump together when they are stimulated by exposure to the underlying connective tissues.
- Explains the functions of the blood, including respiration, waste elimination, thermoregulation, nutrient delivery, immunity and defense, and water and ph balance.
- Explains that the formed elements of the blood include red blood cells, white blood cell, and platelets.
- Explains that erythropoiesis in the red bone marrow is a direct stimulus for red blood cell formation. iron, folic acid, and vitamin b12 are required for the production of these cells.
- Explains how the shape of a rbc enables it to perform its functions. erythrocytes have the flexibility to alter shape as necessary due to their deformable spectrin net.
- Explains that white blood cells, also called leukocytes, play an imperative role in immunity, allergic responses, inflammation, and the production of antibodies.
- Explains the homeostatic mechanism that reduces and controls blood loss is hemostasis and coagulation, which is a defense that is most effective against bleeding to death.
- Explains how fibrin clots are dissolved by the plasma protein plasminogen, which is activated by kallikrein and factor xii. platelet repulsion, thrombin dilution, and natural anticoagulants prevent inappropriate coagulation
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- Explains the purpose of the experiment, which consisted of dilution of stock blood solution suspended in isotonic, or 0.9%, saline solution.
- Explains that 5-6 drops of the stock blood solution were suspended onto a test tube containing 3 ml of 3.0% nacl and resulted in the appearance of crenated blood cells.
- Explains that the blood cells suspended in an isotonic saline solution did not change in shape because the solute concentration within the cell was equal to that of the solution.
- Explains the purpose of the experiment, which consisted of dilution of stock blood solution suspended in isotonic, or 0.9%, saline solution.
- Explains that 5-6 drops of the stock blood solution were suspended onto a test tube containing 3 ml of 3.0% nacl and resulted in the appearance of crenated blood cells.
- Explains that the blood cells suspended in an isotonic saline solution did not change in shape because the solute concentration within the cell was equal to that of the solution.
- Explains that 5-6 drops of the stock blood solution were suspended into different solvents for hemolysis, despite having the same osmolarity of 0.3m. glucose and nacl had low partition coefficients and decreased permeability.
- Explains that ionization of certain solvents can create a state of temporary permeability which can allow the passage of the solutes.
- Describes the experiment in which 4-5 drops of stock blood suspension were added to 3ml of 0.30 m nh4cl. cell mobility became increasingly stagnant and some cells shrunk while others lysed.
679 wordsRead More - The Functions Of Kidneys And Kidney Structure Functionexplanatory essay· Gets rid of waste: The kidneys get rid of toxins, urea, and excess salts.
In this essay, the author
- Explains that the levels of electrolytes in the body can become higher or lower when the amount of water changes in your body.
- Explains that the kidneys have different functions, such as getting rid of toxins, urea, and excess salts. they regulate blood pressure by producing angiotensin.
- Explains that the kidney regulates the volume and composition of body fluids and removes waste products from the body.
- Explains that the levels of electrolytes in the body can become higher or lower when the amount of water changes in your body.
- Explains that the kidneys have different functions, such as getting rid of toxins, urea, and excess salts. they regulate blood pressure by producing angiotensin.
- Explains that the kidney regulates the volume and composition of body fluids and removes waste products from the body.
- Explains how a nephron separates water, small molecules, and ions from the blood and then collects the needed molecules.
- Explains the proximal convoluted tubule, which reabsorbs 2/3 of filtered na and h2o, impermeable to na, k, and cl, as well as the thick ascending loops.
- Explains that the urinary system regulates the volume and composition of body fluids by removing waste products. adh (anti-diuretic hormone) is a hormone made by the hypothalamus in the brain.
- Explains that sodium, chloride, potassium, and potassium regulate the body's fluid levels. too little fluid could cause crenation and lysis.
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