[BOW] Cell Movement Examples

Diffusion: the spreading of something more widely
Ex: The sickening scent of cigarette smoke spreads through the air.

 Video:

Facilitated diffusion:  a passive movement that does not require energy like ATP or carrier proteins
Ex: sodium ions go through facilitated diffusion

Video:

Active transport: the movement of a chemical substance through a gradient of concentration in the direction opposite to
Ex: Fish gills have cells that remove salt from the body by pumping it into the salt water

Video:

Osmosis: the tendency of a fluid to pass through a semipermeable membrane into a solution where the solvent concentration is higher.
ex: when you put salt on a slug, water diffuses the slug and causes it to shrivel up

Video:

endocytosis: the process in which the cell takes in materials from the outside and fusing them with its plasma membrane
ex: skeletal muscle cells taking in neurotransmitters

Video:

REFERENCES
http://dictionary.reference.com/browse/diffusion
http://answers.yahoo.com/question/index?qid=20080917074441AAXTAsL
http://www.youtube.com/watch?v=STzOiRqzzL4
http://dictionary.reference.com/browse/osmosis
http://www.biology-online.org/dictionary/Endocytosis
http://en.wikipedia.org/wiki/Facilitated_diffusion
http://en.wikipedia.org/wiki/Diffusion
http://www.youtube.com/watch?v=gXJMBgyT_hk
http://www.youtube.com/watch?v=OV4PgZDRTQw
http://www.youtube.com/watch?v=sdiJtDRJQEc
http://www.youtube.com/watch?v=4gLtk8Yc1Zc

[BOW] Same Object, Different Microscopes

Grasshopper scanned under compound light microscope.







Grasshopper scanned under  electron microscope.

Neuron cell scanned under compound light microscope.













Neuron cell scanned under  electron microscope.













E. coli scanned with compound light microscope.

 E coli scanned through  electron microscope.

Red blood cells scanned with compound light microscope.

Red blood cells scanned through electron microscope.

Plant cells scanned through compound light microscope.

Plant cell scanned through electron microscope.







Pros and Cons of...
Compound light microscope: 
Pros--easy to use, inexpensive
con-- limited magnification
Electron microscope:
pros-- better magnification and resolution, can view organelles
con-- cells have to be dead in order to view, more expensive than compound light microscope


http://www.ehow.com/info_7852716_pros-cons-light-microscope.html
http://en.wikipedia.org/wiki/Electron_microscope
ALL PICTURES WERE FOUND ON GOOGLE IMAGES.

[BOW] Three Different Types of Cells

A neuron is an electrically charged cell that uses electrical and chemical signalling to transfer information. When neurons bond with each other, they form networks. Neurons are specifically found in the nervous systems of most animals. Neurons stop reproducing after birth, so some parts of the brain have more neurons at birth than later in life because neurons are not replaced when they die.

A myocyte is the type of cells you find in muscles. Each myocyte contains very long chains of sacromeres known as myofibrils. There are cardiac, skeletal, and smooth muscle  myocytes. Cardiac myocytes are responsible for igniting the electrical impulses that control the heart rate.

Sperm cells are the male reproductive cells, found in most plants and animals. All sperm cells that meet with an egg of a female grows into a new organism. Without the sperm cell, no plants or animals would be here in existence.

All of these cells are formed from other cells, are the basic structure and function of living things, and exist in all living things.

[BOW] Five Major Nutrients + their properties.

Carbohydrates are the main source of energy for the body.

 

Many of the body's processes, including chemical reactions, take place in water.
And is crucial for transporting oxygen in blood, because blood is 95% water.

Fats, or lipids help regulate body temperature and essentially reserves energy. Because some vitamins are fat soluble, you need fats to absorb some vitamins.

Proteins carry out many functions in the body including growth and repair, signaling from one cell to another, and defense against diseases.

Vitamins are required as co-factors involved in chemical reactions and other body processes. The absence of various vitamins in our body can result in diseases such as scurvy, for example.

Minerals help your body grow, develop, and stay healthy. They can also strengthen bone and teeth structure, fluid and acid-base balance, and nerve cell transmission.





REFERENCES:
http://www.milk.co.uk/page.aspx?intPageID=130
http://importanceofwater.org/
ALL PICTURES WERE TAKEN FROM GOOGLE IMAGES
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