Biology Basics Quiz
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Questions and Answers

What is the basic structural unit of all living organisms?

Cell

What type of substance is tested for using Benedict's reagent?

Sugar

What is the primary function of the heart?

To pump blood throughout the body.

What is the main function of enzymes in biological reactions?

<p>To speed up chemical reactions.</p> Signup and view all the answers

Which blood vessels carry oxygenated blood away from the heart?

<p>Arteries</p> Signup and view all the answers

What does bile do in the digestive process?

<p>It helps emulsify fats into small droplets.</p> Signup and view all the answers

What is the product of starch digestion by amylase?

<p>Sugars (glucose)</p> Signup and view all the answers

What type of blood do veins typically carry?

<p>Deoxygenated blood.</p> Signup and view all the answers

What is the primary function of red blood cells?

<p>To carry oxygen.</p> Signup and view all the answers

Identify two risk factors for coronary heart disease.

<p>High cholesterol and smoking.</p> Signup and view all the answers

What distinguishes malignant tumors from benign tumors?

<p>Malignant tumors grow rapidly and can spread throughout the body.</p> Signup and view all the answers

What is the role of guard cells in leaves?

<p>To control the opening and closing of stomata.</p> Signup and view all the answers

How do root hair cells absorb water?

<p>They absorb water by osmosis.</p> Signup and view all the answers

What does xylem transport in plants?

<p>Water and dissolved minerals.</p> Signup and view all the answers

What is the formula for calculating cardiac output?

<p>Stroke volume x heart rate.</p> Signup and view all the answers

What are the components of blood and their primary function?

<p>Red blood cells (carry oxygen), white blood cells (fight infection), platelets (help blood clot).</p> Signup and view all the answers

What is the process called when a cell becomes specialized?

<p>Differentiation.</p> Signup and view all the answers

How does a sperm cell's structure aid in its function?

<p>It has a streamlined head, a long tail, and many mitochondria for energy.</p> Signup and view all the answers

What is the equation for calculating magnification?

<p>Image size divided by actual size equals magnification.</p> Signup and view all the answers

Where are embryonic stem cells found and what is their potential?

<p>Embryonic stem cells are found in embryos and can develop into any type of cell.</p> Signup and view all the answers

What are the main arguments against stem cell research?

<p>Embryos are considered human life, and scientists should seek other sources for stem cells.</p> Signup and view all the answers

Define diffusion in the context of cell biology.

<p>Diffusion is the movement of particles from a higher concentration to a lower concentration.</p> Signup and view all the answers

How do alveoli facilitate gas exchange in the lungs?

<p>Alveoli have a large surface area, thin moist walls, and a rich blood supply.</p> Signup and view all the answers

What is active transport in cellular processes?

<p>Active transport is the movement of substances against their concentration gradient.</p> Signup and view all the answers

What structural feature of villi aids in nutrient absorption in the small intestine?

<p>Villi have a large surface area and a good blood supply.</p> Signup and view all the answers

How can having one illness increase the risk of another?

<p>Having one illness can make a person more susceptible to another illness due to weakened health or immune response.</p> Signup and view all the answers

What is the definition of health in the context of Biology?

<p>Health is defined as the state of being free from disease or refers to physical and mental wellbeing.</p> Signup and view all the answers

What environmental factors influence the rate of transpiration in plants?

<p>Light intensity, temperature, and humidity are key environmental factors affecting transpiration rates.</p> Signup and view all the answers

What are statins used for in treating heart disease?

<p>Statins are drugs used to lower cholesterol levels in the blood to prevent heart disease.</p> Signup and view all the answers

What advantage do stents provide in heart disease treatment?

<p>Stents restore blood flow by stretching narrow arteries, offering long-term benefits for patients.</p> Signup and view all the answers

How does smoking correlate with lung cancer deaths over time according to the graph?

<p>The graph shows an upward trend in lung cancer deaths corresponding to an increase in cigarettes smoked per person.</p> Signup and view all the answers

What is one major disadvantage of heart transplants?

<p>A major disadvantage of heart transplants is the lack of available donors, which can limit treatment options.</p> Signup and view all the answers

Which lifestyle factors are associated with an increased risk of lung and heart diseases?

<p>Smoking, unhealthy diet, and excessive alcohol consumption are key lifestyle factors linked to lung and heart diseases.</p> Signup and view all the answers

What are pathogens?

<p>Pathogens are microorganisms that enter the body and cause disease.</p> Signup and view all the answers

How do pathogens commonly spread through water?

<p>Pathogens can be carried by contaminated water.</p> Signup and view all the answers

Name two functions of the skin in the defense system.

<p>The skin acts as a barrier to pathogens and helps prevent them from entering the body.</p> Signup and view all the answers

What role do phagocytes have in the immune system?

<p>Phagocytes engulf and digest pathogens.</p> Signup and view all the answers

What is a vaccine?

<p>A vaccine is an injection of weakened pathogens that help produce immunity against diseases.</p> Signup and view all the answers

Why do antibiotics not treat viral infections?

<p>Antibiotics kill bacteria but do not work on viruses because viruses replicate inside body cells.</p> Signup and view all the answers

What are the symptoms of measles?

<p>Symptoms of measles include a red rash, fever, cough, and sore throat.</p> Signup and view all the answers

What is the function of antibodies?

<p>Antibodies are proteins produced by the immune system to target and destroy pathogens.</p> Signup and view all the answers

What is a placebo?

<p>A placebo is a substance that looks like a drug but has no medicinal effect.</p> Signup and view all the answers

How are malaria and salmonella contrasted in terms of transmission?

<p>Malaria is transmitted by mosquitoes, while salmonella spreads through contaminated food.</p> Signup and view all the answers

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