The Scientific Way of Thinking

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The Scientific Way of Thinking

NAT_DC
Colorado Technical University
Introduction to the Sciences
Professor
April 2015

Protein
Protein

is an important dietary
nutrient with many essential
functions in the body. Walsh, C. P.
(2013).

Four Examples of Organs and
Substances


Collagen is the “most abundant protein in the human body.
It is regarded as the substance that holds the whole body
together and can be found in the bones, muscles, skin and
tendons.”
Mcintosh, James. (2014, November 24).



Hemoglobin is a “protein molecule in red blood cells that
carries oxygen from the lungs to the body's tissues and
returns carbon dioxide from the tissues back to the lungs.” Davis, Charles Patrick, & Shiel, William C, Jr. (n.d.)



Enzymes – Proteins that increase the rate of chemical
reactions in your body.
Topness, E. (n.d.). 6 Primary Functions of Proteins



Antibodies are proteins that prevent infection, illness, and disease.
Topness, E. (n.d.). 6 Primary Functions of Proteins

What you can see and what
you cannot see
What

you can see
Collagen  Your skin
Hemoglobin  The air you breathe
What you cannot see
Antibodies
Enzymes

High and Low Quality
Proteins
High

Quality Proteins are animal
based proteins. Examples are
eggs, poultry, fish meat, and
cheese.
Protein. (2012, October 4).

Low

Quality Proteins are certain
plants that lack certain essential
amino acids. Examples are
certain breads, cereal, pasta,
rice, beans, peas, lentils, and
nuts.

Carbohydrates
Organic

compounds consisting of
carbon, hydrogen, and oxygen, in
which hydrogen and oxygen are
in a 2:1 ratio. Casirola, D. P.
(2013).

Difference between Starch and
Cellulose
In

starch “all the glucose repeat units
are positioned in the same direction.”
In cellulose, “each successive
glucose unit is rotated 180 degrees
around the axis of the polymer
backbone chain, relative to the last
repeat unit.”
Cellulose - The Difference Between Cellulose and
Starch - Breaking the Vicious Cycle. (2015)

Which Ones can Humans Digest?
Humans

can eat starch but they
cannot digest cellulose.
The body of humans contains
enzymes that breaks down starch
into glucose that fuels the body.
Cellulose - The Difference Between Cellulose
and Starch - Breaking the Vicious Cycle.
(2015)

Lipid
Organic

compounds found in the
tissues of plants and animals that
serve as energy-storage molecules,
function as solvents for waterinsoluble vitamins, provide
insulation against the loss of body
heat, act as a protective cushion
for vital organs, and are structural
components of cell membranes.
Courtney, A. P. (2013).

Lipids (continued)

What role do lipids play in the
body?


In the human body, lipids are known as fats. They take
the form of phospholipids, cholesterol and fatty acids.



Triglycerides is blood and body fat, they play an
important role when it comes to energy storage.



Cholesterol in the human body makes steroids known as
estrogen, progesterone and testosterone. “Cholesterol
is a major component of bile -- a soap-like substance
your liver makes to break down fats.”



Phospholipids are the chains of fatty acids in the human
body that uses it to make cell membranes. “Your body
uses phospholipids to make the membranes of new
cells and maintain the membranes of existing cells.”
What Role Do Lipids Play in the Human Body? (2014,
March 14).

Distinguish between saturated
and unsaturated fats.


Saturated fats are “solid at room temperature.” This
is known as the bad fat. This type of fat is not good
for your cholesterol or your heart.



Unsaturated fats are “liquid at room temperature.”
This is known as the good fat. This type of fat is
beneficial to your heart.
Sheehan, J. (n.d.).



Examples of saturated fat are found in processed and
animal foods such as meats, products of diary, and...