Blood and Blood Types Worksheet with True/False Questions
Worksheet with multiple-choice questions about blood and blood types, including statements to be marked as true or false.
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Step-by-step solution for: Blood True/False Worksheet by The Teacher Team worksheets library
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Show Answer Key & Explanations
Step-by-step solution for: Blood True/False Worksheet by The Teacher Team worksheets library
Let’s go through each statement one by one and decide if it’s true or false. I’ll explain why for each so you understand.
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1. Hemoglobin combines with both oxygen and carbon dioxide.
✔ True — Hemoglobin in red blood cells carries oxygen from lungs to tissues, and also helps carry some carbon dioxide (about 20-25%) back to the lungs. It doesn’t carry most CO₂ (that’s done as bicarbonate), but it does bind some directly.
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2. The primary function of erythrocytes is to fight infection.
✘ False — Erythrocytes = red blood cells. Their job is to carry oxygen. Fighting infection is done by white blood cells (leukocytes).
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3. Neutrophils usually die at the site of infection.
✔ True — Neutrophils are first responders to infection. They engulf bacteria and often die doing it — that’s what makes pus!
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4. Diapedesis is the ability of leukocytes to move between capillary walls.
✔ True — Diapedesis means white blood cells squeezing through tiny gaps in capillary walls to get to infected tissue. Super important for immunity!
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5. Whole blood has more viscosity than water or blood plasma.
✔ True — Viscosity = thickness. Whole blood has cells + proteins, so it’s thicker than water or just plasma (which is liquid part without cells).
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6. The most common type of blood cell is RBCs.
✔ True — Red blood cells make up about 99% of all blood cells by count. Way more than white blood cells or platelets.
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7. A normal blood pH is 7.35–7.45.
✔ True — Blood must stay slightly alkaline. If it goes below 7.35 → acidosis; above 7.45 → alkalosis. Both dangerous.
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8. The spleen acts as a reservoir for blood during exercise.
✘ False — The spleen stores *some* blood (especially in animals like dogs), but in humans, its main jobs are filtering old RBCs and helping immune response. Not really a “reservoir” during exercise — that’s more liver and veins.
*(Note: Some sources say spleen can release stored blood in emergencies, but not typically during normal exercise. So we’ll mark this FALSE for standard human physiology.)*
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9. Leukocytosis indicates an infection in the body.
✔ True — Leukocytosis = high white blood cell count. Often happens when your body is fighting infection or inflammation.
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10. Approximately 57% of the population is O negative.
✘ False — O negative is actually rare! Only about 6–7% of people have O negative blood. O positive is most common (~37%). This number is way off.
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11. Blood typing can be used to prove that an individual is the father in a paternity suit.
✘ False — Blood typing can *exclude* someone as a father (e.g., if child has AB blood and dad is O, he can’t be the father). But it cannot *prove* paternity — only DNA testing can do that.
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12. Rh-negative mothers should receive anti-Rh antibodies after delivery of an Rh-positive baby.
✔ True — Yes! To prevent future pregnancies from being affected by Rh incompatibility. The shot (RhoGAM) stops mom’s immune system from making antibodies against Rh+ blood.
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13. The heart rate of a fetus is regular.
✘ False — Fetal heart rate varies normally — it speeds up and slows down with movement, sleep, etc. Regularity isn’t expected like in adults. In fact, variability is a good sign!
---
14. The pericardial cavity contains serous fluid that lubricates the heart and minimizes friction.
✔ True — The pericardium is the sac around the heart. Between its layers is serous fluid — lets the heart beat smoothly without rubbing.
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15. The myocardium is composed of cardiac muscle.
✔ True — Myocardium = middle layer of heart wall = made of cardiac muscle tissue. That’s what contracts to pump blood.
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16. Chordae tendineae attach valves to papillary muscles.
✔ True — These are the “heart strings.” They connect AV valves (tricuspid & mitral) to papillary muscles to keep valves from flipping inside out when heart contracts.
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17. All arteries carry oxygenated blood except pulmonary arteries.
✔ True — Pulmonary arteries carry deoxygenated blood from heart to lungs. All other arteries carry oxygen-rich blood away from heart.
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18. Albumin and globulins are two of the formed elements in the blood.
✘ False — Formed elements = cells and cell fragments: RBCs, WBCs, platelets. Albumin and globulins are *plasma proteins*, NOT formed elements.
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19. Tissue factor initiates the intrinsic coagulation pathway.
✘ False — Tissue factor starts the extrinsic pathway. The intrinsic pathway is triggered by damage inside the vessel (like exposed collagen). Extrinsic = outside trigger (tissue injury).
---
Now let’s list the answers clearly:
Final Answer:
1. True
2. False
3. True
4. True
5. True
6. True
7. True
8. False
9. True
10. False
11. False
12. True
13. False
14. True
15. True
16. True
17. True
18. False
19. False
---
1. Hemoglobin combines with both oxygen and carbon dioxide.
✔ True — Hemoglobin in red blood cells carries oxygen from lungs to tissues, and also helps carry some carbon dioxide (about 20-25%) back to the lungs. It doesn’t carry most CO₂ (that’s done as bicarbonate), but it does bind some directly.
---
2. The primary function of erythrocytes is to fight infection.
✘ False — Erythrocytes = red blood cells. Their job is to carry oxygen. Fighting infection is done by white blood cells (leukocytes).
---
3. Neutrophils usually die at the site of infection.
✔ True — Neutrophils are first responders to infection. They engulf bacteria and often die doing it — that’s what makes pus!
---
4. Diapedesis is the ability of leukocytes to move between capillary walls.
✔ True — Diapedesis means white blood cells squeezing through tiny gaps in capillary walls to get to infected tissue. Super important for immunity!
---
5. Whole blood has more viscosity than water or blood plasma.
✔ True — Viscosity = thickness. Whole blood has cells + proteins, so it’s thicker than water or just plasma (which is liquid part without cells).
---
6. The most common type of blood cell is RBCs.
✔ True — Red blood cells make up about 99% of all blood cells by count. Way more than white blood cells or platelets.
---
7. A normal blood pH is 7.35–7.45.
✔ True — Blood must stay slightly alkaline. If it goes below 7.35 → acidosis; above 7.45 → alkalosis. Both dangerous.
---
8. The spleen acts as a reservoir for blood during exercise.
✘ False — The spleen stores *some* blood (especially in animals like dogs), but in humans, its main jobs are filtering old RBCs and helping immune response. Not really a “reservoir” during exercise — that’s more liver and veins.
*(Note: Some sources say spleen can release stored blood in emergencies, but not typically during normal exercise. So we’ll mark this FALSE for standard human physiology.)*
---
9. Leukocytosis indicates an infection in the body.
✔ True — Leukocytosis = high white blood cell count. Often happens when your body is fighting infection or inflammation.
---
10. Approximately 57% of the population is O negative.
✘ False — O negative is actually rare! Only about 6–7% of people have O negative blood. O positive is most common (~37%). This number is way off.
---
11. Blood typing can be used to prove that an individual is the father in a paternity suit.
✘ False — Blood typing can *exclude* someone as a father (e.g., if child has AB blood and dad is O, he can’t be the father). But it cannot *prove* paternity — only DNA testing can do that.
---
12. Rh-negative mothers should receive anti-Rh antibodies after delivery of an Rh-positive baby.
✔ True — Yes! To prevent future pregnancies from being affected by Rh incompatibility. The shot (RhoGAM) stops mom’s immune system from making antibodies against Rh+ blood.
---
13. The heart rate of a fetus is regular.
✘ False — Fetal heart rate varies normally — it speeds up and slows down with movement, sleep, etc. Regularity isn’t expected like in adults. In fact, variability is a good sign!
---
14. The pericardial cavity contains serous fluid that lubricates the heart and minimizes friction.
✔ True — The pericardium is the sac around the heart. Between its layers is serous fluid — lets the heart beat smoothly without rubbing.
---
15. The myocardium is composed of cardiac muscle.
✔ True — Myocardium = middle layer of heart wall = made of cardiac muscle tissue. That’s what contracts to pump blood.
---
16. Chordae tendineae attach valves to papillary muscles.
✔ True — These are the “heart strings.” They connect AV valves (tricuspid & mitral) to papillary muscles to keep valves from flipping inside out when heart contracts.
---
17. All arteries carry oxygenated blood except pulmonary arteries.
✔ True — Pulmonary arteries carry deoxygenated blood from heart to lungs. All other arteries carry oxygen-rich blood away from heart.
---
18. Albumin and globulins are two of the formed elements in the blood.
✘ False — Formed elements = cells and cell fragments: RBCs, WBCs, platelets. Albumin and globulins are *plasma proteins*, NOT formed elements.
---
19. Tissue factor initiates the intrinsic coagulation pathway.
✘ False — Tissue factor starts the extrinsic pathway. The intrinsic pathway is triggered by damage inside the vessel (like exposed collagen). Extrinsic = outside trigger (tissue injury).
---
Now let’s list the answers clearly:
Final Answer:
1. True
2. False
3. True
4. True
5. True
6. True
7. True
8. False
9. True
10. False
11. False
12. True
13. False
14. True
15. True
16. True
17. True
18. False
19. False
Parent Tip: Review the logic above to help your child master the concept of what is a falsehood worksheet answer.
