EMB.OL.F2013: Part 1: Blood (continued), the Red Blood Cells
Last time we began our journey through blood composition and functions, as you learned
about blood plasma and its major components. You also learned about thrombocytes
EMB.OL.F2013: Part 4: Urinary System
Today, we will talk about the Urinary System, also called the Excretory System.
The main and primary function of this system is to cleanse the blood toxins and metabolic wastes, to
EMB.OL.F2013: Part 3: Facilitated Diffusion and Osmosis
Facilitated (or helped) diffusion is still diffusion, meaning, molecules are moved down the
concentration gradient, but they are too large or polar to pass through the
EMB.OL.F2013: Part 4: Active Transport: Protein Pump and Phagocytosis
Active transport is when in order to move molecules across the cell membrane, the cell has
to spend some energy doing it (it needs to spend ATPs).
We will sta
EMB.OL.F2013: Part 3: Enzyme Inhibition
First of all, to inhibit means to stop or slow down.
So, there are things that can stop or slow down enzyme activity.
And we are talking about things besides temperature, pressure, pH (thin
EMB.OL.F2013: Part 2: Passive Transport: Simple Diffusion
Passive transport happens spontaneously, because of the Law of the Universe: all substances
want to be equally distributed at equal concentration everywhere possible.
EMB.OL.F2013: Part 5: Respiratory System
Today you will become familiar with terms pertaining to the Respiratory System, also called
the Pulmonary System.
The function of this system is to bring oxygen into the body and expel c
EMB.OL.F2013: Part 3: Lipid Oxidation and Disease
Everywhere around us in the atmosphere, there are these molecules called free radicals.
Free radicals are molecules that hold an extra electron, which makes them highly unstable.
EMB.OL.F2013: Part 2: Cellular Respiration
Cellular respiration of glucose takes 3 major chemical reaction processes:
1. Glycolysis (followed by the Intermediate Step)
2. Krebs Cycle
3. Electron Transport Chain
We will exami
EMB.OL.F2013: Part 3: Aerobic vs. Anaerobic Respiration
Aerobic VS. Anaerobic
Therefore, if all 3 steps are completed, in the presence of oxygen, 1 glucose molecule can be burned completely to yield 38
Note: Oxygen (O2) is essentia
EMB.OL.F2013: Part 1: Nutrient Processing
Today we are focusing on Nutrient Processing and Metabolism, and we will stay on this topic
for the next couple of lectures.
As you remember,
Cellular Metabolism is the sum of all chemical reactions withi
EMB.OL.F2013: Part 4: Digestive System
Earlier today, we talked about Nutrient Processing steps.
The Digestive System plays an important role in bringing the nutrients into the body and eliminating some
The digestive syst
EMB.OL.F2013: Part 2: Nutrient Deficit
Whether you are not getting enough calories on purpose, by fasting or dieting, or you are forced to starve
due to famine or other lifethreatening situations, your body does not know the diff
EMB.OL.F2013: Part 3: The Solution is Balance!
(Please note: this part of the lecture, in GREEN font, is optional, you will not be tested on
it, however, please read this, as this is important information on healthy lifestyle, which
can help you m
EMB.OL.F2013: Part 1: Energy Metabolism: Nutrient Surplus
Regardless of what you eat or how much you eat, your body needs to use a certain X number of ATPs every
day (every minute!), because regardless of your diet, your heart n
EMB.OL.F2013: Part 4: Central Nervous System: The Brain
Central Nervous System
Our lesson today focuses on the introduction of the CENTRAL Nervous System.
We began our conversation about the nervous system last time. Today, we are
EMB.OL.F2013: Part 2: Protein Catabolism
As you remember from earlier lectures, proteins are made of amino acids.
Each protein has a very specific function in the body (hormones, receptors, transporters, antibodies, clotting factors,
EMB.OL.F2013: Part 3: Ammonia and Excretion of Metabolites
Ammonia is excreted as follows:
First, Ammonia (NH3) is sent to the Liver, our detox center of the body, which turns toxins and
metabolites into excretable form.
In the case of ammonia, i
EMB.OL.F2013: Part 1: Enzymes
As you remember, chemically, enzymes are proteins. And we have mentioned earlier (very
briefly) that enzymes are these tiny little machines inside your cells and outside of the cells
that make chemical reactio
EMB.OL.F2013: Part 1: Using Lipids for Energy
We have already figured out how the carbohydrates get metabolized inside each cell, and
that will serve us as the back bone for building the knowledge of how other nutrients get
used by your cells for
EMB.OL.F2013: Part 1: Lipid Monomers - Fatty Acids
So far, we have been taking about hydrophilic molecules, mostly: carbohydrates, most amino
acids, and nucleotides are watersoluble, for most part. But what about hydrophobic
EMB.OL.F2013: Part 1: The Cell
Today we are moving on and starting a new topic.
We will be discussing the anatomy of a typical cell in your body. Yet, before we do that, we need to clarify
All the organisms on Earth (including us) can
EMB.OL.F2013: Part 2: Chemical Bonds
Chemical Bonds, a.k.a. molecular bonds, come in two major types:
IONIC or COVALENT
If each element was like a person, then them forming a molecular bond with another
element is like marrying tha
EMB.OL.F2013: Part 4: Atom
As mentioned earlier:
Matter is made up of Molecules,
Molecules are made up of Atoms, and
Atoms are made up of Subatomic Particles.
This brings us to another very important part of the Physics of Life: understa
EMB.OL.F2013: Part 3: Physics of Life
Physics of Life
There are some common terms everyone in this class needs to understand.
We will start with Matter. Everything around us is made of matter. But what is it?
Matter is anything that takes space a
EMB.OL.F2013: Part 1: Health Dimensions
The 6 Dimensions of Health
Since you have chosen to pursue a career in Healthcare, it is important to stress it all about helping
people, caring, and patience. It is also one of the noblest career paths in
EMB.OL.F2013: Part 2: Proteins
Unlike carbohydrates where a polymer, such as starch, is made of the same kind of
monomers, proteins are more complex. They contain not just one kind of monomeric unit
that gets repeated over and over again
EMB.OL.F2013: Part 2: Organization of Human Body
Organization of the Human Body
All living things have a unique organization of structures, even the tiniest ones made up of a single cell:these are
called unicellular organisms (e.g. bacteria and y
EMB.OL.F2013: Part 4: Body Cavities
We continue introducing new terms that describe human body, and here, we will focus on
the bodycavities. Body Cavities are large spaces inside the body containing organs.
There are two major cavit