6. What sequence of events occurs in the female reproductive tract during menstruation? A. Hormones signal the lining of the uterus to thicken; this thickened lining produces bleeding known as menstrual flow.

B. Hormones signal the lining of the uterus to break down; it sloughs off and passes out of the body; later the uterine lining begins to thicken and start the process over again.

C. An egg is released from the ovary; it travels down the fallopian tube to the uterus, where it implants; if sperm are present, a pregnancy begins.

D. An egg is released from the ovary causing a bloody discharge; if sperm are present the egg may be fertilized in the uterus and implant in the fallopian tube.

What can friends provide to affect mental health positively? a)peer pressureb)challengesc)conflictd)com panionship

Match the following. biodegradable diabetes n hazardous w cancer ozone 1. the layer of the atmosphere that the ozone layer is part of the type of wastes that can be broken down by other organisms into a reusable form the type of solid, liquid, or gas wastes that are toxic, flammable, corrosive, reactive, or radioactive the process by which certain waste materials, such as plastic, glass, aluminum, and paper are prepared for reuse 5. the addictive drug found in tobacco a disease frequently developed by smokers and passive smokers a disease of the pancreas in which insulin is not produced in 7. the correct amounts so that glucose can be converted into energy or stored as fat formed in the atmosphere when chemicals, called volatile 8. organic compounds (vocs), and nitrogen dioxide (no2) are acted upon by sunlight when burned, it can cause an increase of co2, ozone, and sulfur dioxide in the atmosphere stratosphere fossil fuel recycle nicotine

The frequency in wich you perform certain exercise depends on the blank of the exercise