By: Dr Pandula Siribaddana
An infection that we encounter in day to day life varies in many different aspects. The variation can be in the form of spread, susceptibility, virulence, progression, duration of the illness, signs and symptoms as well as in the treatment process. But, one of the...
Positron emission tomography: The PET scan explained
By: Bill Fitzgerald
Positron emission tomography is an imaging test that uses a small amount of radioactive material (radiotracer) to show how your tissues and organs are functioning. The radiotracer can be injected, taken orally, or inhaled; the method of delivery and the amount of radiotracer will depend...
What is sinus surgery?
By: Marcus Wong
Most chronic sinusitis patients may resort to invasive sinus surgery after having been on prescribed medication for many years and found them to be ineffective. For those who constantly from recurrent sinusitis, sinus surgery is also recommended although as a last resort. Acute sinusitis and...
Overview of the functions of saliva
By: Joseph Gray - 558640
Saliva is a fluid produced in the mouths of most animals. In humans it is produced by three pairs of salivary glands, the parotids in each cheek over the jaw and in front of the ears, the submandibular glands at the back of the mouth...
Difference between dominant and recessive genes
By: Magda DH
Difference between dominant and recessive genes Strictly speaking, there is no such a thing as a dominant or recessive gene. A gene is a section of the DNA that encodes a particular instruction, or a set of overlapping instructions: a basic unit of inheritance. A...
By: Norman Greenberg
Did you ever think of planning a sporting event based on your body temperature? Well, there has been a huge question of whether a person's body temperature can affect his or her reaction time. Reaction time is the amount of time that it takes for...
What are gene alleles?
By: Magda DH
Alleles are different versions of the same gene. In popular every day usage, when people talk of "a gene for something" they often mean what is correctly called "allele". There is no gene for blue eyes, for example, or gene for wrinkled pea seeds: what...
Is there scientific evidence for an intelligence gene?
By: Magda DH
There is no scientific evidence for a single intelligence gene: intelligence is too complex a phenomenon (some even argue whether such a thing as "intelligence") exists) to be controlled by a single gene, or even a simple combination of a few genes. However, there is...
By: Magda DH
Human blood groups are classified according to the presence of certain antigens on the surface of red blood cells. The greatest practical significance of blood group systems is to do with blood transfusions, and the most important divide human blood types according to the ABO...
By: Alison Bowler
Viruses are the smallest of the infectious disease causing agents. They contain either RNA or DNA (but not both) within a protein coat or virion. The viral nucleic acid encodes the make up of this virion as well as some enzymes required for viral replication...

 

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