Men taking anabolic steroids (synthetic testosterone) to build muscle mass often exhibit shrinking testicles and reduced sperm count.  WHY?

Which of the following hormones will only be found in a woman who is pregnant?

Oxytocin reduces uterine contractions during delivery via a negative feedback loop.

A human embryo will develop into a female unless male-specific genes on the Y chromosome are expressed.

Which of the following is regulated by a simple endocrine pathway?

Another term for self-rule is _____.

Which of the following women is most likely to conceive dizygotic twins?

Which baby is most likely to sleep beside their mother?

Some genes are _____, which means “many forms.”

An individual’s inherited biochemistry reacts to alcohol in different ways, causing various reactions in humans, including all the following EXCEPT _____.