When the skin is exposed to ultraviolet rays, the skin produces a molecule that is turned into Vitamin D.
Sun is the source of ultraviolet rays important for Vitamin D production. Due to this reason, in the case of Vitamin D deficiency, it is recommended by doctor's to absorb sunlight by skin. The Vitamin D production occurs specifically by UV B rays rays which lie in the range of 290-315 nanometer.
The chemical 7-dehydrocholesterol absorbs these rays and convert to previtamin D3. Further, previtamin D3 isomerizes to Vitamin D. Other than sunlight, Vitamin D can be taken through diet. The sources include seafood like fish, fish oil, dairy products, beef liver etc. Vitamin D is required for bone and teeth formation, muscle contraction, immune system etc.
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The second line of defence is a group of cells, tissues and organs that work together to protect the body. This is the immune system.
When a pathogen (disease-causing organism) invades the body, the neutrophils gather at the entry site and try to engulf it and destroy it.
A T helper cell will recognise only one pathogen. If the T helper cell recognises the invader, it will immediately clone to increase numbers.
After a few days of fighting off the pathogen, you will recover from your infection.
Answer:
The correct answer is:
D. Use home safety practices to prevent contamination.
Explanation:
Answers A,B,C are all responsibilities of the producers. To ensure upmost quality.
Consumers= Persons who purchase these goods for personal use.
There are several ways to do this:
- Social media
- Word of mouth to friends, family, relatives
- Newspaper ads
- Events section in magazines/newspapers
> You can develop severe acne, oily skin and hair.
> Have sever hair loss.
> Get liver disease, such as liver tumors and cysts.
> Have a major kidney disease.
> Suffer from heart disease, such as heart attack and stroke.
> And also have altered mood, irritability, increased aggression, depression or suicidal tendencies.
" hope this helped"
