Sperm are formed originally in the ________
A) vas deferens B) bulbourethral glands
C) seminiferous tubules D) prostate gland
Answer: C
You might also like to view...
In a non-dividing cell, what part of the life
cycle is it in?
a. G1 b. S c. G2 d. prophase e. more than one of these
What is the name of the area of the organelle in which organelle DNA is packaged?
What will be an ideal response?
Leptin is a circulating hormone that is produced by fat cells and plays a role in body metabolism and obesity. It normally binds to receptors in the brain and inhibits appetite. Studies have demonstrated that when obese mice that are leptin deficient are injected with leptin they quickly lose their excess weight. Interestingly, however, many overweight people have high levels of leptin in their bloodstream. Why do you think that the high levels of leptin in obese individuals are insufficient to curb their appetite?
A. The form of leptin released by obese people may lack protein kinase activity. B. Paracrine signaling may be disrupted in obese people with high levels of leptin. C. Obese people who have high levels of leptin may have a leptin receptor with decreased sensitivity. D. In obese people with high levels of leptin, the leptin is a nonfunctional second messenger.
Which organism is killed by atmospheric oxygen?
A. facultative anaerobe B. obligate aerobe C. obligate anaerobe D. aerotolerant anaerobe