ཚན་རིགScienceKids, ages 11 to 14English

Cells in the human body

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Questions

1Multiple choice · 20 s · 10 ptsNot played yet
About how many cells make up the body of an adult human?
- AThousands
- BMillions
- CA few billion
- DTens of trillions
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2Multiple choice · 20 s · 10 ptsNot played yet
These cells were scraped from the inside of a cheek and stained blue. What is the dark spot in each cell?
- AThe nucleus
- BA vacuole
- CA chloroplast
- DThe cell wall
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3Multiple choice · 20 s · 10 ptsNot played yet
Which list goes from the smallest to the largest?
- AOrgan, tissue, cell, organ system
- BCell, tissue, organ, organ system
- CTissue, cell, organ system, organ
- DCell, organ, tissue, organ system
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4Multiple choice · 20 s · 10 ptsNot played yet
What do we call a group of similar cells that work together to do one job?
- AAn organ
- BAn organism
- CA tissue
- DAn organ system
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5Multiple choice · 20 s · 10 ptsNot played yet
Which part of a cell releases energy from food by respiration?
- ANucleus
- BMitochondria
- CCell membrane
- DVacuole
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6Multiple choice · 20 s · 10 ptsNot played yet
This microscope picture shows the most common type of cell in your body. Which cells are they?
- ANerve cells
- BSkin cells
- CRed blood cells
- DFat cells
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7True or false · 20 s · 10 ptsNot played yet
Mature human red blood cells have no nucleus, which leaves more room to carry oxygen.
- ✓True · བདེན།
- ✕False · རྫུན།
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8Multiple choice · 20 s · 10 ptsNot played yet
Haemoglobin in red blood cells carries oxygen. Which mineral from our food does the body need to make haemoglobin?
- AIron
- BCalcium
- CIodine
- DPotassium
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9Multiple choice · 20 s · 10 ptsNot played yet
About how long does a red blood cell live before it is replaced?
- AAbout 1 day
- BAbout 1 week
- CAbout 4 months
- DAbout 10 years
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10Multiple choice · 30 s · 10 ptsNot played yet
Some nerve cells like these stretch from the spinal cord in your lower back to your toes. About how long is one in an adult?
- AAbout 1 millimetre
- BAbout 1 centimetre
- CAbout 10 centimetres
- DAbout 1 metre
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11Multiple choice · 20 s · 10 ptsNot played yet
What can muscle cells do that most other cells cannot?
- AContract, or get shorter
- BCarry oxygen in the blood
- CMake food from sunlight
- DMake antibodies against germs
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12Multiple choice · 30 s · 10 ptsNot played yet
Cells lining your windpipe have tiny hairs that sweep mucus and dust up to the throat. What are these hairs called?
- AVilli
- BCilia
- CRoot hairs
- DAlveoli
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13Multiple choice · 20 s · 10 ptsNot played yet
This graze on a knee is healing. How does the body make the new skin cells it needs?
- ACells come from food
- BCells grow out of blood
- CCells join together
- DCells divide in two
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14Multiple choice · 20 s · 10 ptsNot played yet
How many chromosomes are in the nucleus of most human body cells?
- A23
- B46
- C12
- D100
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15Multiple choice · 20 s · 10 ptsNot played yet
What is a gene?
- AA section of DNA with instructions
- BA type of blood cell
- CA part of the cell wall
- DA tiny germ inside cells
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16Multiple choice · 20 s · 10 ptsNot played yet
Which special cells can develop into many different kinds of cells?
- ARed blood cells
- BSkin cells
- CStem cells
- DNerve cells
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17Multiple choice · 20 s · 10 ptsNot played yet
How does oxygen move from the blood into body cells?
- ABy the heart pumping it in
- BBy nerves carrying it in
- CBy digestion
- DBy diffusion
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18True or false · 20 s · 10 ptsNot played yet
All the cells in the human body have the same shape and size.
- ✓True · བདེན།
- ✕False · རྫུན།
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19True or false · 20 s · 10 ptsNot played yet
Every day you lose lots of dead skin cells from the surface of your skin.
- ✓True · བདེན།
- ✕False · རྫུན།
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20Multiple choice · 30 s · 10 ptsNot played yet
Watch the video. A white blood cell is chasing a germ. What will it do when it catches it?
- ASwallow and destroy it
- BTurn it into a red blood cell
- CCarry it to the lungs
- DGive it oxygen
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