Archive for the ‘nutrition’ Category

What is the definition of nutrition and structures in Science?

Thursday, January 28th, 2010

There’s a follow-up question after this: What is the comparison and contrast between the structures, nutrition and reproduction of the 5 kingdoms ( Monera, Protoctista, Fungi, Animalia, Plantae)?

Please reply A.S.A.P. Thanks for helping.

The five-kingdom classification of organisms
Nomenclature: Naming of organisms
Binomial: Biological name of an organism → Genus species
Taxon: Set of organisms within a category / Taxonomy / Study of biological classification
Different levels of taxons: SPECIES, GENUS, FAMILY, ORDER, CLASS, PHYLUM, KINGDOM
Most number of species on right
Most similar organisms on left
Unicellular: Single cell; Colonial: Groups of cells; Multicellular: Many cells
Autotrophs produce energy from inorganic sources
Phototrophs from photosynthesis/sunlight
Chemotrophs from simple inorganic (oxidative) processes
Heterotrophs digest and absorb organic molecules

Prokaryotae (prokaryotes)
Cell structure:
Prokaryotes, unicellular
Prokaryotes lack cytoplasmic organelles found in eukaryotes
Cell wall: murein
Nutrition: autotrophic (photosynthesis, chemosynthesis), aerobic heterotrophs
Divide by binary fission, not by mitosis
≈10μm in size (bacterial cell, filaments of blue-green bacteria)
Mutualistic nitrogen-fixing bacteria live in nodules on the root of legumes / symbiotic

Protoctista (protoctists)
Cell structure: eukaryotes, unicellular and multicellular
Cell wall: (sometimes) polysaccharide
Nutrition: autotrophic, heterotrophic
Placed in this category by exclusion / cannot be placed in any other kingdom
Slime moulds / fungi characteristics
Protozoa / heterotrophic and ingest food
Algae / photosynthesis
≈10μm (amoeba) – 1m (Laminaria / large brown alga)

Fungi
Cell structure: eukaryotes, multicellular and unicellular (yeast)
Cell wall: chitin
Nutrition: heterotrophic / saprotrophic decomposers or parasitic
Genus Penicillium
Body of a fungus is composed of thin filaments called hyphae / form a mycelium
Secret enzymes / external digestion / absorbs resulting nutrients
Erect hyphae that grow upwards from the mycelium carry their reproductive spores
Chains of spores on the erect hyphae / coloured mould visible on stored food
Break down organic matter

Plantae (plants)
Cell structure: only multicellular, eukaryotic; large vacuoles
Cell wall: cellulose
Nutrition: autotrophic (photosynthetic)
Growth is restricted to meristems (layers/patches of dividing cells)
Non-motile; adapted to land / strong tissues, leave gas exchange system, waterproofed
Eg mosses, ferns, conifers, angiosperms (flowering plants)

Plant kingdom has two different types of adults in their life cycle
Gametophytes, hidden in plant / sexual reproduction forms multicellular zygotes
Sporophytes, what we call plant / asexual reproduction to form spores that germinate into gametophytes
Gametophyte (n) → gamete (n) → fertilisation → zygote (2n) → mitosis → sporophyte (2n) → meiosis → spore (n) → mitosis → gametophyte (n)

Animalia (humans, animals)
Cell structure: eukaryotic, multicellular, no cell wall
Develop form a blastocyst / embryo
Have nervous and hormonal control systems
No cell wall!
Nutrition: heterotrophic, involving a digestive system
Are motile and grow throughout tissues (no mersitems)

How do you create a nutrition facts label?

Wednesday, January 20th, 2010

A nutrition facts label is required on most pre-packaged food in North America. How would someone go about creating one for one of their products?

This is actually a great question, I’ve been through this and I can tell you this; if you will produce more than 10,000 units or will have I believe 10 or more employees then you need a nutrition label and it needs to be displayed in certain areas. You can find an independent food lab in the yellow pages under laboratory. Now things may of changed so I would suggest going to the FDA website (www.fda.gov) just type in business in the search bar and you’ll find tons of info regarding policies. I would suggest if you are serious, finding out if a college near you deals with the culinary arts and if they have any cross classes in business that may help people out for class projects etc.

What kind of sport nutrition stuff should i get to cut down the fat and build muscle?

Tuesday, January 12th, 2010

Im 15, i play football and I want to get rid of some of my extra fat and build muscle in its place. a couple of my friends use like sport nutrition powder and it really shows off on them. I’m gunna buy some soon but there are so many different kinds. I don’t know which one to buy. Do I just go into the nearest GNC and ask them or please post what you reccommend.

I highly recommend Pure Whey Protein Stack

Champion Nutrition does it again! This flavor is relatively new to me… I tried a sample pack a couple of months ago and it was absolutely delicious. It’s not a super-fake banana taste (like the Runts candies), but more of a creamy flavor, which is implied by the play on words that is the name of the flavor (Banana Scream::Bananas’n'Cream).

The quality of the protein is excellent as well, including both isolate and concentrate (a stack). Great overall consistency, stirring ability (a bit thick on the surface of the liquid when you stir it), shaking consistency is perfect (frothy, creamy, lump-less), and blend-ability is great, too. It thickens up and lightens up nicely when blended, turning 16oz of shake into about 24 oz’s of a lighter frothier liquid. It has a consistent texture when blended as well, unlike some proteins that settle and have separation.

Overall, I give this whey a 5/5. Delicious taste, great macros, and great price.

I bought it with free shipping from…
http://www.amazon.com/gp/product/B0001FSDQM?ie=UTF8&tag=aor-sale-20&linkCode=as2&camp=1789&creative=390957&creativeASIN=B0001FSDQM
Hope you find your favorite. Good Luck!

How can we educate people more about good nutrition?

Tuesday, December 22nd, 2009

With all the obesity and eating disorders going on, it seems like maybe we’re not educated about nutrition and exercise enough to eat healthy .I know for a fact that they didn’t teach us squat about nutrition or weight loss in public school, which is in my opinion a major concern.
But we already have good, healthy food that you can grow in your backyard : fruit and veggies :)
Thanks, I didn’t know about Michelle Obama!! That is an awesome thing she is doing.

I think it’s the FDA’s and parents’ fault, really. They try to get schools to serve healthier lunches (which, by many standards, are still not very healthy.) Additionally, excessive attention is paid to Calories, while very little is paid to what TYPE of Calories are being consumed (i.e. protein, carbohydrates, fats).

The harm of fat is also grossly overestimated, and importance of avoiding simple carbs hardly mentioned at all (most people don’t know that sugars are simple carbs, let alone that many of their favorite non-sugary foods also contain simple carbs).

I asked my school why we can’t be served whole milk, considering that fat-free milk contains as much as 10 more grams (roughly 2.5 teaspoons) more sugar than whole milk. They said that they have no control over what they feed us.

The other day, we had a school-wide (girls and boys separated) assembly (I’m a senior in high school), where we were handed a tiny flyer telling us how to "eat healthily." It involved a number of moronic comments, including living a low-fat lifestyle with NO MENTION of sugar.

I admit that not everyone has the capacity or desire to understand how their bodies function, but everyone should at least be given the opportunity. Even health classes don’t give any justice to a truly proper diet. They make it sound as if you can eat as much of your favorite desert as you’d like, as long as you get your servings of fruits and vegetables, and DON’T EXCEED 2,000 CALORIES.

I can say for a fact that my base metabolic rate is around 2,500 Calories, and that is just the amount I need to SURVIVE with zero exercise while maintaining the same weight.

With the amount of exercise I do (1 hour a day, roughly), I need at least 3,000 Calories a day. Factor in my desire to gain muscle, and I need to eat as much as 4,000 Calories a day.

Education does nothing for people that have not opened themselves up to learning. People need to have a desire to read about it, learn about it, and change their lifestyles.

A large part of it is also parents and how they feed their children. I know kids who have been raised on hamburgers and cheap food, who now think that they can eat McDonalds for the rest of their lives because they haven’t gotten pudgy at the age of 17 or 18.

I also know kids who claim that cigarettes increase their metabolisms to the extent that they can eat significantly more. I think much hope is lost, and we’d frankly be better off with many of these idiots dying. If someone doesn’t respect his or her body to that great of a degree, I doubt the person’s capacity of respecting anyone else.

To finish off on a completely misanthropic and cynical note, some people really should not breath.

How does the lack of nutrition labels on fast foods and restaurant menus affect the African-American community?

Sunday, December 13th, 2009

How does the lack of nutrition labels on fast foods and restaurant menus affect the African-American community SPECIFICALLY?

What questions do you have about obesity and African Americans?

Hello. Most fast food restaurants have their nutritional information available on the Web. But the time to look it up, the interest in doing it and the access to a computer would all be issues…

The real question is why don’t more families cook…food expense has a lot to do with it but buying fast food is actually more expensive, even if you buy the Williams 8 piece dark or McDonald’s chicken nuggets all the time….

Another issue is simply knowing how to cook and teaching your children to like cooked food.

Interestingly enough, this is becoming a problem all over the developed world, and not just with Black people. Even Japanese mothers have trouble somtimes keeping their kids away from the fast food….

People need to grow some food and herbs, cook, and eat what they cook….

This would help obesity issues, immensely. Oh and being active and making exercise a PRIORITY, the way Mrs. Obama and my family do…

What is the best nutrition supplier for bodybuilders?

Friday, December 4th, 2009

From GNC, to Megaplex, to Animal there are soo many nutrition suppliers which one is the leader and most used among professional body builders?

It really doesnt matter where you get it, just what you’re getting. Most of the products are the same, just vary slightly in ingredients. Optimum Nutrition’s whey protein has always been on the top of the bodybuilding supplement list, and for obvious reasons. I ordered myself a 5lb tub of it and it was the best I ever had. They introduced it into the market first after all. For creatine, Higher Power is ranked #1. NO Shotgun still reigns supreme for Nitric Oxide. GNC, DPS Nutrition, even Sams Club carries bodybuilding products.

See below for a link to all the top bodybuilding supplements

http://www.bodybuilding.com/fun/topicoftheweek126.htm

How to compare the nutrition between infant milk and regular milk?

Sunday, November 15th, 2009

I have a 13-month daughter and I’d like to give her a regular milk, but I don’t know how to compare the nutrition. Can somebody tell me the easiest way to do that and also if possible pls mention the milk brand?

My daughter’s pediatrician has said that from 12 months to four years a child should have Whole milk (if the child still isn’t breastfed)… and after four years old that they can have 2%.

How to write/start my speech during nutrition month celebration?

Thursday, November 5th, 2009

this coming july , our school will be celebrating the nutrition month.thus, we will be having our opening program for the celeb..i am assigned to be the master of ceremony.the problem is that: i don’t know how to start my speech,or my script. i have searched in the internet already about some info. anout nutrition month celebration,but i don’t know how to make a simple but effective speech.please help!

I guess you should start off with "Good morning/afternoon everyone, as you all know, this week is nutrition week. For those that do not know, nutrition week is …. blah blah blah. <insert random information here> and just continue on from there.

Is there any relation between nutrition and head growth?

Wednesday, October 28th, 2009

I really need to know. Do people with bad nutrition and diet tend to have bigger head?How does nutrition effect head growth?
Thanks.

Um…no. The size of your head/skull is determined from birth. Your skull will never get bigger than it’s supposed to be (ie, once you stop growing). Therefore, it stands to reason that poor nutrition will not make your head bigger.

In fact, poor diet can have the opposite effect, since your bones will not be getting the nutrients they need to continue growing. If you have a serious nutrition deficiency, it’s possible that your skull will not grow to it’s maximum size.

Is there any relation between nutrition and head growth?

Wednesday, October 28th, 2009

I really need to know. Do people with bad nutrition and diet tend to have bigger head?How does nutrition effect head growth?
Thanks.

Um…no. The size of your head/skull is determined from birth. Your skull will never get bigger than it’s supposed to be (ie, once you stop growing). Therefore, it stands to reason that poor nutrition will not make your head bigger.

In fact, poor diet can have the opposite effect, since your bones will not be getting the nutrients they need to continue growing. If you have a serious nutrition deficiency, it’s possible that your skull will not grow to it’s maximum size.