How to count blood cells with a hemocytometer
By: Samual Bobster Man
A haemocytometer is a device which contains a small chamber which can be filled with fluid. The top of the small chamber is transparent and has a microscopic grid etched into it. Using a microscope it is possible to see through the gird and count...
Hormonal regulation of sodium ions in the body
By: Amelia Walker
Patient 1 and 2 have the same plasma sodium concentration of 140mmol/L. Patient 1 has an urine sodium concentration of 60 mmol/L. Patient 2 has an urine sodium concentration of 200 mmol/L. How can the plasma sodium concentration can be identical in these two patients...
By: Rachel Etherington
I had never heard of Edward's Syndrome until my baby was diagnosed with having Edward's Syndrome when I was 12 weeks pregnant. Edward's Syndrome is a genetic disorder much like Down's Syndrome where the baby has an extra copy of chromosome 18. It is also...
Alternatives to lumbar disc surgery
By: R. Renee Bembry
Almost everyone experiences some sort of lumbar back pain now and then. Most times lumbar pain resolves all by itself. Other times, however, getting rid of lumbar pain may require medical treatment. This is especially true when the lumbar disc is impacted. With that said...
By: Katerina Nikolas
If the slightest ache or pain sends you rushing to the medical dictionary to confirm your suspicions that you have somehow contracted a deadly disease, then rest assured that you are actually unlikely to have one of the top 5 deadliest diseases. Science has made...
Structure and function of the colon
By: Imonikhe Ahimie
The colon is the last part of the digestive system, and together with the cecum and rectum makes up the large intestine. Although it is a part of the digestive system, the colon does not actually carry out any digestive functions; indeed, the entire big...
The role of Lactobacillus acidophilus bacteria in the human digestive tract
By: Alicia M Prater PhD
Lactobacillus acidophilus is a commensal bacterium - it lives in the gastrointestinal tract of humans and other animals without causing disease. The bacteria metabolize lactose, a sugar found in milk and dairy products. Byproducts of the metabolism are lactic acid and antimicrobial products that prevent...
The risks associated with organ transplantation
By: Sandra Piddock
Transplant surgery has saved many lives, and restored the quality of life to many more patients. The first successful organ transplant was a kidney transplant in 1954; a transplant in 1950 failed due to rejection. These days, the success rate for organ transplants is high...
Understanding the process of muscle contraction
By: Lime Red Tetrahedron
Muscle contraction begins when a nerve impulse reaches the synaptic terminals of a motor neuron that synapses with a muscle fiber. The motor neuron releases an excitatory neurotransmitter, which then diffuses across the neuromuscular junction. The neurotransmitter then encounters receptors on the surface of the...
How the human eye works
By: Lime Red Tetrahedron
How the Human Eye Functions The eye is a biological marvel - it allows us to sense objects at vast distances at nearly theoretical resolution. We rely on this sense organ more than any other to live our everyday lives. Its structure and function is...

 

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