Frightening, dreamlike experiences that occur during the deepest stage of non-rapid eye movement (NREM) sleep are known as__________

It takes approximately three times longer for men over the age of 40 to impregnate a partner than it does for men under age 25. Why?

a. lack of libido b. endometriosis c. decrease in the quantity and quality of their sperm d. their partner's fertility

The part of the neuron which collects and combines information is called the

a. axon. b. axon terminal. c. ion channels. d. soma.