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Thread: Interesting Physiological Facts

  1. #1
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    Default Interesting Physiological Facts

    What controls your heartbeat and blood pressure?

    Physiological feedback pathways involving nerves and hormones control the functions of important body organs such as the heart and blood vessels.

    How does the human body cope in extreme environments, such as climbing Mt Everest or deep sea diving?

    There is enough oxygen to supply the human body in our usual environment. But oxygen is in short supply at the top of Mt Everest, while the high pressures experienced during deep sea diving are at the other extreme. However, to deliver oxygen in the right amounts your body can adjust to higher or lower levels. For example, elite athletes who are required to perform at altitudes higher than they normally do will usually spend time acclimatising to the new environment before competing.

    How does loud sound cause deafness?

    Our physical experience of the world around us is mediated by special sensory organs in the body. The cochlea of our ear is specialised for sensitive detection of sound wave energy, but delicate cells in the cochlea can be damaged by too much energy.

    Is eating too much fat really bad for you?

    Fat is a normal and key component of every cell in our body, so it is essential to maintain a certain level of fat in the body to remain healthy. The problem with eating too much fat is that you build up too much adipose tissue. This tissue secretes a hormone called leptin, which eventually damages many of the body's important control mechanisms.

  2. #2
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    Quote Originally Posted by Sheemo

    How does the human body cope in extreme environments, such as climbing Mt Everest or deep sea diving?

    There is enough oxygen to supply the human body in our usual environment. But oxygen is in short supply at the top of Mt Everest, while the high pressures experienced during deep sea diving are at the other extreme. However, to deliver oxygen in the right amounts your body can adjust to higher or lower levels. For example, elite athletes who are required to perform at altitudes higher than they normally do will usually spend time acclimatising to the new environment before competing.
    Ive thought about this.

    I dont think its the case that there is less Oxygen at higher altitudes, but rather lower atmospheric pressure. I thought you felt short of breath cos the decreasing air pressure means you wont be able to inspire/exspire as much or as effectively at this low atmospherical pressure. Yes, Im too lazy to research it myself and Im not expecting any replies.
    Narrated Anas: Allah's Apostle said, "Help your brother, whether he is an oppressor or he is an oppressed one. People asked, "O Allah's Apostle! It is all right to help him if he is oppressed, but how should we help him if he is an oppressor?" The Prophet said, "By preventing him from oppressing others."

    [ Bukhari ]



  3. #3
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    The human mind is amazing! It has so much power over the body's physiology. Sometimes we can't explain why some things happen. For example, a mother sees her child run off to the street and a car **** them. She then suffers from acute blindness while there is no physical nerve problem; or people with dissociative identity disorders (split personalities) expressing diabetes while the other character is completely fine.
    During the journey we commonly forget its goal. Almost every profession is chosen as a means to an end but continued as an end in itself. Forgetting our objectives is the most frequent act of stupidity.-Friedrich Nietzsche

  4. #4
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    For anyone who might be interested, this is an animation of the inner working of the cell. A white blood cell is rolling along in the blood stream and then takes you in the cell to show the inner factory.

    http://www.studiodaily.com/main/searchlist/6850.html (click on the watch video link)

    After all, the patient of the future is a cell. A great majority of diseases result from improper functioning of one or more cells.

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