/u/YourFinestPotions's posts in /r/askscience

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Do tattoos protect the skin from sun damage?

1433 upvotes

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Beta-blockers help dilate the blood vessels, but yet EP and NE cause vasodilation when they attach to beta-2-adrenergic receptors. Does that mean there are little to no Beta-2 receptors in the peripheral vessels, or does it mean less catecholamines bind to alpha 1 and alpha 2 receptors?

1268 upvotes

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How do rigors "spread" throughout the body when someone feels cold or experiences a strong emotional response?

10 upvotes

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Why is heart cancer mostly unheard of?

6 upvotes

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How far along have we come in the advancement of AI, and additionally the consumer aspect of it (e.g Siri, Alexa, Google Assistant, Cortana)?

2 upvotes

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Why does vomitting alleviate dizziness?

1 upvotes

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Why don't I see any more houses with lightning rods?

1 upvotes

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If a person was the 10x the normal size of a human being, would the average human being sound “tinier” to the giant?

1 upvotes

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Fluorescent light bulb use a spiky plastic sheet as a cover. Do these spikes help disperse light? Why would one side be preferred to be facing up vs another?

1 upvotes

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Title	Upvotes	Mark as read	Favorited	Rating	Add to a list
Do tattoos protect the skin from sun damage?	1433
Beta-blockers help dilate the blood vessels, but yet EP and NE cause vasodilation when they attach to beta-2-adrenergic receptors. Does that mean there are little to no Beta-2 receptors in the peripheral vessels, or does it mean less catecholamines bind to alpha 1 and alpha 2 receptors?	1268
How do rigors "spread" throughout the body when someone feels cold or experiences a strong emotional response?	10
Why is heart cancer mostly unheard of?	6
How far along have we come in the advancement of AI, and additionally the consumer aspect of it (e.g Siri, Alexa, Google Assistant, Cortana)?	2
Why does vomitting alleviate dizziness?	1
Why don't I see any more houses with lightning rods?	1
If a person was the 10x the normal size of a human being, would the average human being sound “tinier” to the giant?	1
Fluorescent light bulb use a spiky plastic sheet as a cover. Do these spikes help disperse light? Why would one side be preferred to be facing up vs another?	1