The purpose of castration is to ____.
a. decrease testosterone levels c. physically alter a man's appearance
b. increase estrogen levels d. decrease progesterone levels
Question 2
Although testosterone is necessary for normal sexual functioning in males, the use of anabolic/androgenic steroids, which increases testosterone levels in males, actually decreases sex drive and leads to shrinkage of the testicles. Why does this occur?
a. An overdrive of testosterone in the body hyper-stimulates testosterone receptors, thus short circuiting the system.
b. The testosterone produced from anabolic/androgenic steroid use, is not as effective as the testosterone produced from normal physiological responses.
c. Positive feedback to the anterior pituitary will inhibit hormone release.
d. Negative feedback to the anterior pituitary will inhibit hormone release.
X ray diffraction of beads on a string at different levels
Pulse oximetry. The small device provides a digital readout of oxygen levels in the blood.
Does everything in nature have a unique purpose (entelechy)?
Levels of chromatin structure
Energy passes among trophic levels
Macro-, Meso-, Micro-Levels of Society