Tagged Questions
4
votes
0answers
57 views
What is the evolutionary reason behind the fragility of teeth?
Almost all organs in the human body have a rather large threshold within which the organ or tissue is capable of repairing itself using materials supplied by the body, whether it's made from organic ...
1
vote
1answer
50 views
What could cause hairs to gray at the tips but not the roots?
I have noticed that some of my sporadic gray hairs are gray at the tip side but oddly, not near the roots. Some are even only gray in the middle. I find all of this very counter intuitive, and I ...
5
votes
1answer
46 views
Why do we yawn?
I've read a new study which suggests that yawning may help you keep a cool head. Also, the findings might hold some hope for sufferers of insomnia, migraines, and even epilepsy.
Is there any ...
2
votes
1answer
59 views
Why do genitals feel frozen when freefalling?
I don't want to add much more about that. Since childhood I noticed a chilling effect, even when doing rollercoaster-type activities.
2
votes
1answer
132 views
Which blood vessel carries the most impure blood?
There is a question in my Biology textbook:
"Which blood vessel in the human body carries most impure blood after
few hours of meal."
The answer is given as Renal artery.
But I think the ...
3
votes
1answer
90 views
Do adipose cells divide in adults?
I have a dim recollection of having heard that when humans gain weight, adipose cells just get larger, rather than dividing. True?
1
vote
1answer
46 views
In a human, what non-germline cells have the highest/lowest mass?
I'm just curious which cells are largest/smallest in the human body other than sperm/ova.
9
votes
2answers
373 views
Will humans and animals be harmed by frequencies outside their hearing range?
The human ear (for example) is sensitive to frequencies from 20Hz to 20kHz. Any sound beyond that limit would not be heard by us naturally.
Will it harm us (effect our ability to hear) when we hear ...
6
votes
3answers
157 views
Weighing 2 vertical halves of the human body
I had this thought while bathing:
Assume a perfectly developed physical human body and anatomy in terms of size, dimensions and proportions. In theory, if I cut the body vertically into two exact ...
16
votes
2answers
235 views
Why would diffusion be faster across a non-specialised tissue?
The standard protocol for a person experiencing chest pains is to chew a 300mg aspirin tablet, the argument being that chewing rather than swallowing the tablet results in the aspirin entering the ...
