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VERY IMPORTANT QUESTIONS ABOUT LABORATORY TOOLS 1. Which tool is used for measuring precise volumes of liquids in the laboratory?    a) Graduated cylinder    b) Beaker    c) Test tube    d) Flask 2. What instrument is primarily used for heating substances in the laboratory?    a) Thermometer    b) Pipette    c) Bunsen burner    d) Stirring rod 3. Which of the following is used for transferring small amounts of liquid?    a) Beaker    b) Graduated cylinder    c) Pipette    d) Erlenmeyer flask 4. What is the purpose of a burette in the laboratory?    a) Measuring precise volumes of liquids    b) Heating substances    c) Dispensing small amounts of liquid    d) Mixing solutions 5. Which tool is used to hold and mix small quantities of liquids?    a) Beaker    b) Test tube    c) Erlenmeyer flask    d) Stirring rod 6. Which instrument is used to measure temperature in the laboratory?    a) Thermometer    b) Bunsen burner    c) Balance    d) Pipette 7. What is the primary function of a microscope in the laboratory?    a) Measuring mass    b) Observing small objects or organisms    c) Heating substances    d) Mixing solutions 8. Which tool is used for accurate weighing of substances in the laboratory?    a) Graduated cylinder    b) Beaker    c) Balance    d) Flask 9. What tool is commonly used to hold and transport small amounts of solid substances?    a) Beaker    b) Test tube    c) Petri dish    d) Erlenmeyer flask 10. Which tool is used to measure the pH of a solution in the laboratory?     a) Bunsen burner     b) pH meter     c) Graduated cylinder     d) Pipette 11. What is the primary use of a centrifuge in the laboratory?     a) Heating substances     b) Measuring volume     c) Separating components of a mixture based on density     d) Mixing solutions 12. Which tool is used for mixing small amounts of liquids or for grinding solids into fine powders?     a) Beaker     b) Erlenmeyer flask     c) Mortar and pestle     d) Pipette 13. What is the primary function of a spectrophotometer in the laboratory?     a) Measuring temperature     b) Observing microscopic objects     c) Analyzing the concentration of substances in a solution     d) Dispensing precise volumes of liquids 14. Which tool is used to measure the electrical conductivity of a solution in the laboratory?     a) pH meter     b) Bunsen burner     c) Conductivity meter     d) Graduated cylinder 15. What is the primary function of a petri dish in the laboratory?     a) Measuring volume     b) Observing microscopic objects     c) Growing microorganisms     d) Mixing solutions 16. Which tool is used for accurate dispensing of small volumes of liquid?     a) Beaker     b) Graduated cylinder     c) Pipette     d) Erlenmeyer flask 17. What is the primary function of a hot plate in the laboratory?     a) Measuring temperature     b) Heating substances     c) Observing microscopic objects     d) Dispensing precise volumes of liquids 18. Which tool is used for holding and organizing multiple test tubes during experiments?     a) Beaker     b) Test tube rack     c) Graduated cylinder     d) Erlenmeyer flask 19. What is the primary function of a stopwatch in the laboratory?     a) Measuring temperature     b) Timing reactions or experiments    c) Observing microscopic objects   d) Dispensing precise volumes of liquids 20. Which tool is used for filtering solids from liquids in the laboratory?     a) Beaker     b) Graduated cylinder     c) Funnel     d) Erlenmeyer flask 🤲Share for your friends🤲 https://t.me/GADAA_BARNOOTAA https://t.me/GADAA_BARNOOTAA https://t.me/GADAA_BARNOOTAA

The liver is a vital organ in the human body with a wide range of functions. Some of the key functions of the liver include: 1. Metabolism: The liver plays a central role in the metabolism of carbohydrates, proteins, and fats. It helps regulate blood sugar levels by storing glucose as glycogen and releasing it when needed. The liver also metabolizes proteins and fats, converting them into energy or storing them for later use. 2. Detoxification: The liver is responsible for detoxifying harmful substances in the body, such as drugs, alcohol, and metabolic waste products. It processes these substances to make them less harmful and facilitates their elimination from the body. 3. Bile Production: The liver produces bile, a greenish-yellow fluid that helps in the digestion and absorption of fats. Bile is stored in the gallbladder and released into the small intestine when needed to aid in the digestion of fats. 4. Storage: The liver serves as a storage site for essential nutrients such as vitamins (A, D, E, K) and minerals (iron and copper). It also stores glycogen, which can be converted back into glucose to maintain blood sugar levels. 5. Immune Function: The liver plays a role in the body's immune system by filtering and removing bacteria, toxins, and other foreign substances from the blood. It also produces immune factors that help fight infections and maintain immune balance. 6. Synthesis of Proteins: The liver synthesizes various proteins essential for blood clotting, transport of nutrients, and maintaining fluid balance in the body. Examples include albumin, clotting factors, and enzymes. 7. Regulation of Cholesterol: The liver helps regulate cholesterol levels by producing cholesterol and removing excess cholesterol from the bloodstream. It also converts cholesterol into bile acids for excretion. Overall, the liver is a complex organ that performs numerous critical functions essential for maintaining overall health and well-being. https://t.me/GADAA_BARNOOTAA https://t.me/GADAA_BARNOOTAA https://t.me/GADAA_BARNOOTAA

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