Anabolic Steroids Lab Report

1) Hypothesis: If we inject a rat regularly with anabolic steroids, then its testicles would shrink to about 25% of their original size.

2)

Length of Experiment: 7 weeks

Dependent Variable: Size of testicles

Independent Variable: Injection of anabolic steroids

Control Group: 5 rats given food, exercise, and cage. No steroids given.

Test Group: 5 rats given steroids and all other necessary things (food, exercise, etc.)

Materials:

10 black rats a rat running wheel
1470 cups of lettuce (3 cups of lettuce each day per rat)
5 syringes
350 mg of anabolic steroids (trenbolone acetate)(given 5mg 2 times a week to test group)

Controlled Variables:

Diet
Temperature of environment
Amount of injected steroids (for 5 test rats)
Size of rat and testicles
Exercise

Procedure:

Choose 10 male rats that are the same size and have the same testicle size. Measure the size of

When the level of testosterone in your blood is normal, your hypothalamus receives a signal from the testosterone, telling it to stop producing GnRH, which stops LH and FSH production as well. When the steroid makes the production of LH and FSH stop, your testicles never get the signal to start making sperm and testosterone, as LH and FSH send those signals. Because the testosterone level in your blood is sufficient (because of the steroids), your testicles have nothing left to do. So your testes simply shrink from lack of use. It would be as if you had to walk around everyday, but you suddenly stop and sit around all day. This causes your muscles to shrink, just like testes. The reason that injecting yourself with trenbolone as well as human chorionic gonadotropin stops these side effects is because the human chorionic gonadotropin acts as the hormones LH and FSH. It tells your testicles to produce sperm and testosterone, allowing them to function