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.
Learn more about Vitamin D -
brainly.com/question/4551554
#SPJ4
The correct answer is Option A. - True .
A property of a moving body that determines how long it takes to come to rest when subjected to a constant force is called momentum .
<h3>Explain momentum ?</h3>
- It is measured by "mass velocity," because momentum depends on velocity, and it also depends on the direction of the body's motion.
- Momentum is a vector quantity because velocity is a vector and mass is a scalar quantity. Momentum equals mass multiplied by velocity.
- Momentum is simply a quantity of motion. Quantity is measurable in this case because if an object is moving and has mass, it has momentum.
- If an object does not move, it does not have momentum. However, it is important in everyday life, but many people are unaware of it.
To learn more about momentum refer to :
brainly.com/question/1042017
#SPJ2
Life is the seemingly endless cycle of the repetitious processes of the mind altering psychoactive dispositions of intricate and faulty human responses to stimuli.
