Muscle Soreness

I’ve been gettign alot of questions lately about muscle soarness and what I’ve talked about in terms of lactic acid build up versus microscopic tears in the muscle fiber. Now I just want to start by letting you know that both are true, but in different circumstances. Here is an explanation:

There are 2 types of muscle pain. One is the burning that you feel in your muscles while you are working out, and this is commonly known as lactic acid build up. The second kind is the stiffness and soreness you may encounter for up to 2-5 days after you have worked out. This pain is referred to as delayed onset muscle soreness (DOMS for short).

Lactic acid is created when the body is not getting enough oxygen to break down the glucose required for energy. Lactic acid is produced at these moments of time of extreme anaerobic activity (such as weight lifting) as a defensive measure, forcing the body to slow down and catch its metabolic breath. The burning feeling you are experiencing is a sure sign that you are working out to your maximum. Once your body starts producing the lactic acid in high quantities the body can only continue that particular muscle use (rep) for another 1 -3 minutes. The lactic acid does not hang around in your muscles for too long, from several to twenty-four hours.

DOMS is the correct term for the pain, stiffness and suffering you may encounter when you try to get out of bed the day or two after the massive or new workout. This pain and stiffness usually peaks within the first 1-2 days and then subsides. The length of recovery time can depend on the muscle damage and subsequent repair necessary. Yes, you read right. DOMS is actually caused by the inflammation and damage of the muscles created by the workout. Generally, if DOMS is caused by a new workout routine, your muscles will soon adjust and you will find the DOMS will stop troubling you.

REFERENCES:

http://fitnesstips101.com/articles/muscle-soreness-lactic-acid-buildup-doms-explained/
http://www.dailymuscle.com/2006/03/31/muscle-soreness/
http://sportsmedicine.about.com/cs/injuries/a/doms.htm
http://www.webmd.com/fitness-exercise/guide/sore-muscles-keep-exercising

Cell Structure & Organelles

This video clip is a visual introduction to cells and their importance in living systems. We actually know a decent amount about cells and that knowledge is ever increasing and expanding.

This video gives a tour of the cell and covers not only the organelles, but structure, types, and history of discovery.

This is a nice look at the structures of the cell and the functions that they perform.

This video uses the same idea that we are aiming for in our organelle pamphlete.

This is a fun video/Rap based on Jay-Z’s “Empire State of Mind.” Goes over cell structure.

The next two videos are from Crash Course and look at Plant and Animal Cells.

This final video is actually a student video and looks at the cell as a factory:

History of Cell Theory

The history of cell theory is a look at evolving thoughts and technology. This first video is a somewhat childish look at the discover of cells.

This second video really matches up nicely with what we covered in class. It covers cell theory, the two types of microscopes, and the two types of cells.

The complicated history of cell theory.

So here are the three tenants (or parts) of cell theory:

1. All living things are composed of cells.
2. The cell is the basic unit of structure and function.
3. All cells arise from pre-existing cells.

Meiosis

The following video shows the stages of meiosis. Remember that meiosis is the process of producing haploid gametes.

The only thing missing from this video is crossing over where genetic material is swapped between homologous chromosomes.

This second video includes crossing over and shows the same process in a little different way. Remember that Meiosis and Mitosis are similar processes, but the end result is different because Meiosis has a second division and produces haploid gametes instead of diploid body cells.

Mitosis Meiosis
Goal Identical Cells Sex Cells
(egg & sperm)
Divisions Divides Once Divides Twice
Outcomes 2 Identical Cells 4 Sex Cells
Chromosomes All 46 chromosomes are present
(2N)
Only 23 chromosomes are present
(N)

Cancer

Remember that we have our cells test coming up very soon. Organelle pamphletes are due November 8th and 9th. Here are some videos on cancer to help with this final section of our cells unit.

This first one is a brief overview of what cancer does and how it spreads.

The next video goes over how the process of growth regulation and cell death occurs before going into the process of cancer.

You might also want to check out the following video at YouTube (I can’t seem to embed it) http://www.youtube.com/watch?v=j_wRpa2b5XI.

The Biology of Cancer

Cancer is a complicated disease…I wish I could say it was easy, but I think it is very important to start looking at and trying to impart as much understanding about the disease, how it works, and how it is treated, as possible. Some of the material here is beyond the scope of our class and the knowledge being taught and assessed in our class.

What is Cancer Animation

Understanding Cancer

An Academic Look At Cancer

Cancer Risk Factors

Factors Impacting Cancer Growth – The end of this video looks at one companies treatment of these factors and cancer (ignore the plug for the company)

Breast Cancer Cells Dividing

Camera on Cancer Research