Cells

Graduation Requirements
Health Science
Field & Cluster
Health Health and Bio Science
Equipment/Materials Needed

Microscope
un splash
Description

The cell is the bases of all life and of real importance in the medical field.
Badge Completion Requirements

 

Cell (from Latin cella, meaning "small room")   

      Basic structural, functional, and biological unit of all known living organisms. 

      The smallest unit of life

      Called the "building blocks of life" 

      Study of cells is called cytology 

 

Cell Theory 

The cell is the smallest unit of life that can maintain and perpetuate itself

 All living things are composed of cells

     All cells arise from other cells

Size of Cells

     Cells grow in size and volume

     Cells are small (in the order of 6 micrometers)

    Cells size is restricted because of moving material in and out of the cell

 

cell movement

 

Oxygen comes from our lungs while the rest comes from our diet. Carbon dioxide is exhaled by our lungs and the remainder leave the body by urine.

 

surface area

All living cells have fluid surrounding them. What about our cells? How about the outer layer of skin? The outer most layer is made of dead cells because they are in contact with the air.

Organisms, such as humans, are multicellular, (humans have an estimated 100 trillion cells; a typical cell size is 10 µm, a typical cell mass 1 nanogram).

The largest known cell is an ostrich egg.

Each cell is at least somewhat self-contained and self-maintaining: it can take in nutrients, convert these nutrients into energy, carry out specialized functions, and reproduce as necessary.

Each cell stores its own set of instructions for carrying out each of these activities.

There are two types of cells, eukaryotic and prokaryotic.

Prokaryotic cells are usually singletons, while eukaryotic cells are usually found in multi-cellular organisms like humans.

Please review the following:

https://youtu.be/gFuEo2ccTPA

Please provide additional resources that support the accuracy of this video.

Please prepare a presentation and submit for discussion with your mentor a demonstration that explains your understanding of this material. Please include why cells tend to be spherical in shape and what limits the size of cells.

 

 

 

 

cell membrane

 

The 6 basic functions of the cell membrane:

      structure and support

     facilitate growth through mitosis 

     allow passive and active transport 

     produce energy 

     create metabolic reactions 

     aid in reproduction.

 

The cell membrane is a complex structure that allows movement between the cytoplasm and the cell's environment.

As you progress in medical science the cell membrane plays an ever-increasing role in the recognition and control of diseases and disorders.

 

https://www.youtube.com/watch?v=QpcACa39YtA

 

Please provide two additional resources that support the accuracy of this video. Rate the videos 1 through 3 (1-best and 3-worst). Explain why you selected the best video.

Research medical conditions that are a result of disorders of the cell membrane. Select a membrane disorder and develop a presentation to submit and discuss with your mentor. 

Diffusion and Osmosis

 

Diffusion and Osmosis

Cell membranes help organisms maintain homeostasis (ability to maintain a stable internal environmental condition) by controlling what enters and exits the cell. 

We've learned in the past that the cell membranes are semi-permeable. Semi-permeable means to allowing certain substances to pass through it but not others

The movement of the substances across the membrane is controlled by diffusion and osmosis

It is important to remember that everything naturally moves from a high concentration to an area of low concentration.  The difference in the concentration levels forms a concentration gradient. Substances move without the use of energy along the concentration gradient from higher to lower. In order to move against the concentration gradient requires some form of energy.

diff. chart

 

Once the concentration is the same or equal it's said that the substance is in a state of equilibrium. Meaning that the concentration is the same in both areas.  

Please review the following:

https://youtu.be/aubZU0iWtgI 

Please provide 2 additional resources that support the accuracy of the video. Rate the videos 1-3 (1-best) and explain your reasoning for your "best" selection.