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1500 questions
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Do mammals develop tolerance to anticholinergics?
I know that first generation H1 antagonists, commonly known as antihistamines have anticholinergic effects. Their sedative side effects go away due to tolerance, but as for their anticholinergic side effects well that's something that is unknown to…
Josh Pinto
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Human spine: Is the coccyx really fused?
Prologue: This post is about the adult (say, a 20 year old) human skeleton; I'm not particularly interested in infant skeletons.
The human spine has is composed of cervical, thoracic, lumbar, sacral and coccygeal vertebrae
Image source
My…
paracetamol
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Has any large-scale origin-of-life simulation/experiment been done?
I have been thinking a little about the origins of life, and was further inspired by this question: How did the first self replicating organism come into existence?
I can accept that we don't quite know exactly how, but has any…
5th
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Why does having cold hands hurt?
(1). Why does having cold hands create a painful sensation?
Is it a physical effect, maybe a protection mechanism from evolution?
(2). Why, if one's hands are cold, does it feel as if they are more susceptible to pain?
Note: I have (2) as a separate…
User 17670
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How does HCl not burn our stomach?
How does the digestive acid (HCl) not burn the surrounding membrane of our stomach? It digests the majority of raw food we eat but how does it stay safely in our stomach?
Also, how does the stomach maintain the ability for a human body to retain…
Zo Has
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Are there certain symmetric-pair muscles that are slightly bigger and NOT due to handedness?
Ok, hear me out, I was just thinking about an article in Nature I read in the past titled "Scrotal asymmetry in man and in ancient sculpture"$^{\dagger}$ and more recently an entire medical textbook detailing everything about hands wherein the…
user36920
13
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8 answers
How does a gene "know" what to change to?
Excuse my ignorance but I've always been curious about this...
For example, a frog is red, but it starts living in a green forest. Over time the frog becomes green to camouflage. But a gene can't see and I'm sure there's no mechanism for color info…
user36637
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Validity of the August Weismann mouse-detailing experiment refuting Lamarckism
Weismann conducted the experiment — described in Wikipedia — of removing the tails of 68 white mice, repeatedly over 5 generations, and reporting that no mice were born in consequence without a tail or even with a shorter tail. This was intended to…
user35321
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Do ants really dispose of their own dead, and how/why?
I just read this from Wikipedia's Swarm Behavior article:
Despite the lack of centralized decision making, ant colonies exhibit complex behaviour and have even been able to demonstrate the ability to solve geometric problems. For example, colonies…
DrZ214
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If cells regularly renew, why do we have scars?
Question may sound bit poetic but I have a pretty basic question here: Often we get a minor wound and cells renew and quickly "cover" it. But when we have deeper wounds, often they leave behind scars. Why does it happen?
I was researching around…
Failed Scientist
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Identify fuzzy black quarter sized spider with orange on abdomen, in Minnesota
Found this spider on my car in Minnesota near St Paul (USA). Total size including the legs (end of rear leg to end of front leg in picture) is probably about the size of a quarter.
Smern
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Why don't we feel hungry after waking up?
Yesterday, I was fasting (drinking only water until I had dinner at 9 pm). After dinner, I went back to my lab (I am a Master's student) and worked till 1:30 AM. By 1 o' clock, I was feeling quite hungry, probably because I hadn't eaten anything all…
user1995
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What tree is this?
Can you please help me to identify this mystery tree. I have been trying to identify it for four years (Leafsnap app didn't help). Here are a few things about the tree.
All the leaf veins are parallel. They remind me of a dogwood tree, but it's…
banana
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What is this ornamental, yellow flower that looks like a smooth pineapple skin?
My mom got this in her Mother's Day arrangement and we have no idea what it is.
Sadie thompson
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How to convert bwa mem output to BAM format without saving SAM file
I want to go straight from bwa mem alignment to BAM format as I don't need the SAM file and it takes up too much space. How do I achieve this?
Michael Hall
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