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Sezon 2007
Yayınlanma tarihi
Ara 24, 2007
Dr Montgomery examines the theme of respiration. Just like racing car engines, humans use oxygen to burn fuels and release the energy that powers each function in every cell. So how do
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Dr Montgomery examines the theme of respiration. Just like racing car engines, humans use oxygen to burn fuels and release the energy that powers each function in every cell. So how do we get the oxygen from the air to the cell, and what happens when oxygen levels in the air are dramatically reduced?
Dr Montgomery looks at the airways that carry the oxygen, and the rib-and-muscle bellows which drive air through them. He examines the lung and explains how it passes the oxygen on to the blood cells which grab and hold that oxygen. Then, viewers are shown how the heart pumps these cells around the body through a complex system of blood vessels, where the oxygen is passed onto the cells for another phase of processing.
In the second half of the lecture, Dr Montgomery meets some mountaineers who have climbed Everest where there is three-times less oxygen than at sea level. What happens to these people’s bodies when they struggle to stand at the very top of the world?
Yayınlanma tarihi
Ara 25, 2007
Tonight’s lecture examines how food is processed and used by our cells. The food we eat contains the fuel we need to power our bodies. But what are these fuels? How do we get them from
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Tonight’s lecture examines how food is processed and used by our cells. The food we eat contains the fuel we need to power our bodies. But what are these fuels? How do we get them from our dinner plates to our cells? And what other things are there in the food apart from fuel? Dr Montgomery explains what happens to the fuel and oxygen in a cell, describing how food is converted into an energy currency to be spent in different ways around the body.
Yayınlanma tarihi
Ara 26, 2007
How the body copes with extremes of temperature. Humans live in some extraordinary places –from the middle of the Sahara desert to the frozen wastelands of Alaska. Take a snake to the
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How the body copes with extremes of temperature. Humans live in some extraordinary places –from the middle of the Sahara desert to the frozen wastelands of Alaska. Take a snake to the North Pole, and it will stop moving in minutes; take a cat to the desert and it will be dead in hours. So how can some humans survive such extremes, and could anyone?
Yayınlanma tarihi
Ara 27, 2007
The focus of tonight’s presentation is stress and exertion. When faced with a threat like the approach of a predator, a human’s natural response is to turn and flee. Yet a soldier facing
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The focus of tonight’s presentation is stress and exertion. When faced with a threat like the approach of a predator, a human’s natural response is to turn and flee. Yet a soldier facing enemy guns can choose to stand and fight. Such a decision and the subsequent physical work required involves burning a huge amount of energy. So how does the body deliver such a large amount of energy so rapidly? What happens to the heart, lungs and blood vessels used to transport the energy, and how is it used once it is delivered?
In addressing some of these questions, Dr Montgomery takes a close look at the workings of the amazing, high-performance, all-terrain vehicle that is the human body. Viewers will learn what the skeleton is made of, how muscles move the skeleton, what these muscles are made of, how they create force, and how they are controlled by the computer in our skulls.
Yayınlanma tarihi
Ara 28, 2007
Tonight’s presentation examines the part genetics has to play in our ability to survive. Is everyone’s ability to survive the same? Faced with the same perils, would we all cope just as
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Tonight’s presentation examines the part genetics has to play in our ability to survive. Is everyone’s ability to survive the same? Faced with the same perils, would we all cope just as well? And if not, is it down to luck or relative toughness, or is there such a thing as the will to live?
Dr Montgomery’s main focus tonight is the complex world of genes –what are they and how do they make us different. How much of the way we are is ‘nature’ and how much ‘nurture’? Do our genes influence our chances of survival? Can they protect us from infections, or help us survive them? Can they allow us to run further and faster? Can they even make us feel more or less pain?
In the second half of his lecture, Dr Montgomery talks to some people who have survived in the face of adversity. To what degree do they credit their endurance to training and preparation, toughness, the will to live, genetics or just good, old-fashioned luck?
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