Sex organs and traits that develop at puberty and are only indirectly involved in human reproduction are called ____________________________ sex characteristics. 

The nervous system is defined as ________________________. 

The brain and spinal cord are two components of the ________________________. 

A biological cycle, or rhythm, that is approximately 24 hours long is called a(n) ________________________ cycle.

The bone that is situated next to the eardrum is called the ________________________; the bone that sits next to the oval window is called the ________________________. 

The ________________________ is a structure in the brain stem responsible for life-sustaining functions, such as breathing and heart rate.

Which of the following is the BEST description of proprioception?

If gender differences in cognition are decreasing, this is probably due to ____________________________. 

Which of the following is one of the ways in which religion helps people reduce or cope with stress?

According to ________________________ theory, sleep is a product of evolution.