00:01
As students, theory we're starting a question in biology.
00:04
As you can see from the question, they've given us that what are the factors affecting nutritional needs and what are the scientific methods to understand nutrition? so all of these questions given here are from a same question that are just segmented into various different questions.
00:17
So they are in the same question also asking us that what are the enzymes and why are they so important for digestion and also quote the relationship between nutrition and health and include overnutrition, undidnutrition and malnutrition in your discussion.
00:31
Okay, so let's answer the following.
00:33
So the first person you're asking factors affecting nutritional need.
00:37
Now, nutrition, okay, nutrition depends upon the following.
00:46
Nutrition depends upon the following reasons i'm going to be writing below.
00:52
The first reason is genetic composition, okay, based on the genes we can determine what is the nutrition needs of the person okay and environmental factors also play a huge role on the amount of nutrition a person needs and the third factor that will be affecting nutrition is life cycle or a lifestyle of the person okay if you are very athletic and you are very active in nature then you'll be having a higher nutrition requirement where if you're kind of sloppy and you do not move so much then you require a limited nutrition and finally the final factor that depends that affects nutrition is age and gender of the person okay we know that as the person is growing the person requires higher nutrition but as the age is declining the nutrition requirement diminishes and by gender we mean that males require more nutrition than the females so these are a four factor that's affecting nutrition.
02:02
So to understand of nutrition, scientists have developed various measures.
02:06
Okay.
02:08
To understand the nutritional requirement or we can simply say nutrition, scientists have taken various measures.
02:19
Okay.
02:20
Some of them include the weight for age.
02:24
Okay, wait for age.
02:26
For example, you have to be under 70 kilograms if you are 15 years old and height for age like you have to be at least 160 centimeters if you are 14 years old and similarly weight for height like you have to be under 75 kilograms if you are 170 centimeters tall and a final factor is mid upper arm circumference mid upper arm so basically they have a particular size how your mid upper arm should look.
03:11
If your mid upper arm is very bulky and fat, it means you are overnourished and if it's very skinny, then you're malnourished and wait for age, height for age and wait for height are the most important and common factors.
03:25
They are the most important and common measures undertaken by researchers and scientists to understand nutritional needs.
03:32
Okay, so any change among these away from normal limits denotes under nutrition or overnutrition.
03:40
Any change, any change among these that drive away, the drive away from any change among these limits.
03:59
That drive away away from normal nutrition denotes two conditions...