The School of Biomedical Sciences Wiki - User contributions [en]

Sweat Gland

2013-10-21T17:07:50Z

120203523:

Sweat glands are glands in the skin that produce a fluid called sweat. The main role of a sweat gland is thermoregulation. There are two types of sweat glands: Apocrine and Eccrine Sweat Glands.

Eccrine sweat glands are found all over the human body. There are between several million eccrine sweat glands and they are stimulated by the cholinergic sympathetic nervous system in which acetyl Choline is the neurotransmitter that triggers the secretion sweat. Eccrine glands secrete sodium ions, chloride ions, lactate and water.

Apocrine sweat glands are usually found in the armpit. They are larger than eccrine glands and there are fewer of them; only around 100,00. They secrete lipids and carbohydrates.

A technique which can be used to study sweat secretion is by attaching a small plastic well to the skin and fill it with paraphrin oil as this will prevent the sweat from evaporating. Small droplets of sweat will begin to appear and these can be collected by fine capillary tubes to analyse the composition.

Spectrin

2012-11-30T12:15:37Z

120203523:

  Spectrin is a protein that is associated with the cytosolic side of the plasma membrane in red blood cells, forming a network that supports the membrane. This is particularly important in red blood cells so that they maintain their concave structure and so can continue to carry oxygen around the blood stream. Spectrin is also present in muscle fibres and is found as a tetramer of two alpha and two beta subunits in actin filaments.<references />Alberts, Johnson, Lewis, Raff, Roberts, Walter, 2008 :1007

Spectrin

2012-11-30T12:14:56Z

120203523: Created page with "  Spectrin is a protein that is associated with the cytosolic side of the plasma membrane in red blood cells, forming a network that supports the membrane. This is particula..."

  Spectrin is a protein that is associated with the cytosolic side of the plasma membrane in red blood cells, forming a network that supports the membrane. This is particularly important in red blood cells so that they maintain their concave structure and so can continue to carry oxygen around the blood stream. Spectrin is also present in muscle fibres and is found as a tetramer of two alpha and two beta subunits in actin filaments.Alberts, Johnson, Lewis, Raff, Roberts, Walter, 2008 :1007/