On your ankle joint, the gastrocnemius muscle is an antagonist to extend the foot away from the knee, then what muscle is the agonist to flex the foot toward the knee?

Peristalsis refers to muscular contractions of the smooth muscle lining the esophagus that result in food moving down into the stomach.

1) What are the 11 organ systems? Hint: What is my nickname? 2) I know I asked a similar question on your first exam. After a month of studying A & P, which organ system speaks to you most and gets you interested in studying, and why?  

Enzymatic digestion of food primarily occurs in the stomach.

Based on this illustration, match the right description with the left numbered muscle.

In order for a muscle contraction to occur, cross-bridges must form between which one of the following structures within a myofibril?

Which one of the following statements correctly describes the activities of muscles? 

The movement of actin and myosin fibers in a muscle contraction contains all of the following steps EXCEPT

Most digestion in humans occurs in the first 25 centimeters of the 6-meter length of the small intestine called the ________.

Each nephron of the kidney consists of a long tubule and associated small blood vessels. Blood cells and plasma proteins are too large to enter with the glomerular filtrate. What is the correct path for the filtrate to follow through the nephron in the production of urine?