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Choose the nephron structure that best matches the description. Some choices may be used more than once.​

The term myogenic indicates that the heart muscle is the source of

In mammals, urine drains out of the ____ into a collecting duct.​

Each red blood cell is shaped as a biconcave disk. This allows it to

In the mammalian heart, the systemic and pulmonary circuits ____.​

The primary organ where erythropoietin is produced is the

Use the accompanying figure and list of structures below to label the diagram of the human heart.​

Imagine that you are studying a new species.  As you examine the circulatory system, you note that a four-chambered heart drives the blood in two directions simultaneously; to the body and to the lungs.  What can you conclude about this animal?  Check all that apply.

The most important factor affecting the pH of plasma is the concentration of

To form a blood clot, a series of plasma proteins must activate in a given sequence. If DNA info for one such protein mutates such that the resulting protein is nonfunctional, predict the consequence.