Nephrons can selectively remove or “cherry pick” particularly dangerous molecules and ions out of the blood for disposal in the urine.  This process is called _______.

Which solute from the list below do you think is the most likely to be secreted into the proximal convoluted tubule?

During inhalation, the diaphragm contracts and flattens, while the rib cage moves up.

The soupy, acidic liquid of partially digested food that leaves the stomach is called _______.

Study this diagram of the respiratory system carefully.  Use it and the pull-down menus below to answer the following questions:

How are the excretion of urine and defecation of feces alike?

Ventilation includes …

The movement of carbon dioxide and oxygen in and out of the blood occurs by _________.

This type of lipid should be included in a healthy diet to help ward off heart disease and the damaging effects of high fructose corn syrup.

Study the urinary system diagram shown below carefully.  Use this diagram and the pull-down menus to answer the following questions: