Sperm

how much do you know about sperm?

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How many chromosomes does a sperm cell contain?

A. 46

B. 23

C. 100

D. 17

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B. 23. Human DNA molecules are packaged into chromosomes, and most human cells have 46. Reproductive cells like sperm and eggs, however, each have half that amount.

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How many sperm per second does the typical human male produce?

A. 20

B. 20,000

C. 1,500

D. 1 milion

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C. The typical human male produces about 1,500 sperm per second — that’s just over 1 million sperm cells per day.

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At what age does and man’s semen quality start to decline?

A. 51

B. 64

C. 29

D. 93

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A. Early research shows that a man’s sperm quality starts to decline around age 51.

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When was sperm discovered?

A. 1492

B. 12 BCE

C. 1988

D. 1677

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D. Dutch scientist Anton van Leeuwenhoek first observed sperm in 1677.

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True or False: Smoking marijuana can lower sperm count.

A. True

B. False

C. It’s complicated

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C. There are studies that have shown both that marijuana lowers or raises sperm count. At this point, scientists know that testicles and sperm cells contain a neurotransmitter that interacts with cannabinoids in marijuana, they just don’t know how that interaction affects sperm.

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