Chapter 12, Problem 9P

What movements occur at the hip joint and knees as you bend down to pick something up?

Figure 38.37 Which of the following statements about muscle contraction is true? The power stroke occurs when ATP is hydrolyzed to ADP and phosphate. The power stroke occurs when ADP and phosphate dissociate from the myosin head. The power stroke occurs when ADP and phosphate dissociate from the actin active site. The power stroke occurs when Ca2+ binds the calcium head.

A _______________ is a drug that causes temporary paralysis by blocking the transmis- sion of nerve stimuli to the muscles. neuromuscular blocker skeletal muscle relaxant

Supination is the motion that moves the ________. hand from the palm backward position to the palm forward position foot so that the bottom of the foot faces the mid line of the body hand from the palm forward position to the palm backward position scapula in an upward direction

In a rock climber like the man pictured in Figure 14.25, which organs of equilibrium are activated? Figure 14.25 Dangling upside down affects several organs of equilibrium. What are they?

Match each of the following terms with the correct meaning. ________ Ventral Lying on the back, face upwards Farther from the point of attachment The front of the body or body part Toward the tail end of the spine

In the diagram below, label the fine structure of a muscle, down to one of its myofibrils. Identify the basic unit of contraction in a myofibril.