Mammals like seals often dive and can remain under water for more than 70 minutes. How do seals kno…
I have heard that sharks excrete $\ce{Na+}$ and $\ce{Cl-}$ by their gill surfaces but divalent ions …
Anectodal. Feel free to shoot it down. Walking is an acquired skill; As far as I'm concerned exhaus…
I am looking review articles for Physiology. For instance, Physiological explanation of steps of mea…
After exercising vigorously one can sometimes smell ammonia and it feels like it's coming from withi…
Although skeletal muscle fatigue fairly rapidly , clam shells have a protein called paramyosin that …
I've wondered about this for a long time, and hopefully someone here has a reasonable answer. I'm a …
I'm sure many of you have experienced this - you scratch your back or brush your hand over your arm …
Some actions, almost behaviour, exist that are common across a species. For instance, based on perso…
A friend of mine asked me this today, and I didn't know. I remember studying the menstrual cycle a f…
What exactly does urea do that harms our body ? Does it interfere with our cellular processes or dis…
If I understand it correctly, levels of serotonin in the brain can indicate if a person is happy. Wh…
http://www.scientificamerican.com/article.cfm?id=why-do-cats-purr The article above says that cats …
I have learnt that our immune system distinguishes self from non-self by using MHC. So a mother duri…
For further investigation into the progress of the blood pressure, we will measure a patient's blood…
I am not a biologist nor know much about biology (so please explain in layman's terms) however I hav…
Is it true that we are more agressive during the night when there is a full moon? If true, could thi…
I've seen that metabolic rate scales logarithmically as function of mass for many animals over an ex…
Like in topic, what molecules/elements/compounds are important and inside the cardiovascular system.…
I have noticed lately that if I go to sleep, when I have my radio running, it is on lowest volume, I…
The title is my question: what organs are absolutely needed (fatal if injured/removed) by the human …
Nutritional and medical recommendations about cholesterol seem to focus exclusively on hypercholeste…
There are no good answers anywhere. so asking: this is not about days of survival without water. Thi…
Why is it that when secretory rate increases in the pancreas the concentration of chloride ions decr…
A classical liver lobule is made up of a central vein and the portal triads. A typical human liver …
I know that the ascending loop of Henle is impermeable to water and ions, and, by end of the ascendi…
Biological systems are pretty good at measuring fairly long times, for example, menstrual cycles (mo…
Put another way if the muscle is given everything it needs to contract and do work will it ever get …
When one exposes theirs body parts to cold environment (especially foot and hands), they may be numb…
If I cook some food, I get apparently several energetic advantages: thermal : the temperature of t…
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