Autumn 2007 - Issue Number 68 Archives - The Physiological Society

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Autumn 2007 - Issue Number 68

Autumn 2007 - Issue Number 68

Below are the feature articles from Physiology News Issue 68, Autumn 2007.

To read the full articles please download the issue.

Features

Central CO2 chemoreception: how can it be done without the perfect receptors?

Central CO2 chemoreception is a vital sensory function believed to be carried out by specific CO2 chemoreceptors. Recent studies suggest that brainstem neuronal networks may be able to achieve high CO2 sensitivity and a wide sensing spectrum by common pH-sensitive ion channels and synaptic interactions

Features

Central CO2 chemoreception: how can it be done without the perfect receptors?

Central CO2 chemoreception is a vital sensory function believed to be carried out by specific CO2 chemoreceptors. Recent studies suggest that brainstem neuronal networks may be able to achieve high CO2 sensitivity and a wide sensing spectrum by common pH-sensitive ion channels and synaptic interactions

Features

Exercise is a good habit for bowel health

Features

Molecular water pumps – or how water can move uphill across epithelia

How are water and glucose absorbed by the small intestine after a meal? In this situation the glucose concentration is high and the water concentration low in the lumen and water has to be transported uphill, into the body, against osmotic pressure differences of up to five atmospheres. The transport mechanisms responsible are molecular and can be stimulated to balance the severe dehydrations experienced in, for example, cholera

Features

Molecular water pumps – or how water can move uphill across epithelia

How are water and glucose absorbed by the small intestine after a meal? In this situation the glucose concentration is high and the water concentration low in the lumen and water has to be transported uphill, into the body, against osmotic pressure differences of up to five atmospheres. The transport mechanisms responsible are molecular and can be stimulated to balance the severe dehydrations experienced in, for example, cholera

Features

Muscular dystrophy and the brain

Features

Circulating ATP and ADP: important regulators of blood flow and platelet reactivity during exercise

Features

Circulating ATP and ADP: important regulators of blood flow and platelet reactivity during exercise

Features

Limitation to exercise performance at altitude – where is peripheral muscle fatigue important?

You might think the answer is ‘where it hurts’, but there is much more to it. Markus Amann explains

Features

Inspiratory muscle training as an ergogenic aid: credible at last?

Recent evidence points to an important role for respiratory muscle work in limiting exercise tolerance. Alison McConnell (below) proposes that it is time to start thinking differently about the role of inspiratory muscle training in alleviating this limitation

Features

Inspiratory muscle training as an ergogenic aid: credible at last?

Recent evidence points to an important role for respiratory muscle work in limiting exercise tolerance. Alison McConnell (below) proposes that it is time to start thinking differently about the role of inspiratory muscle training in alleviating this limitation

Features

What happens to the central respiratory rhythm during breath-holding?

Michael Parkes considers some of the implications of the continuation of the central respiratory rhythm during breath-holding

Features

What happens to the central respiratory rhythm during breath-holding?

Michael Parkes considers some of the implications of the continuation of the central respiratory rhythm during breath-holding