Exam 43: Muscles, Bones, and Body Movements

The radius and ulna are considered to be part of ____.

The sliding filament model of muscle contraction depends on the dynamic interactions between myostatin and myoglobin proteins.

In skeletal muscle contraction, ____ directly fuels the movement of the myosin head.

The most common type of lever system in the body has the force applied ____.

Figure 43.1 A. A B. B  Answer the question using the accompanying figure. The muscle indicated by the letter 'A' is a(n)____ muscle. ​

Muscles that can be controlled and precisely and delicately have few muscle fibers in each motor unit.

A muscle contraction during which fibers cannot relax between stimuli is called ____.

For humans and most vertebrates, the body is supported primarily by ____.

Synovial joints are held together by ____.

The ____ joints, found in the vertebrae and some rib bones,have fibrous connective tissue covering the ends of the bones involved and are somewhat moveable. ​

The I bands in skeletal muscle are composed of ____.

An animal that is evolved for rapid movement over the ground will have relatively ____ bones.

The A bands in skeletal muscle are composed of ____.

Recent research has shown that myostatin can negatively regulate cardiac muscle growth.

Clostridium botulinum produces a deadly toxin that stops muscle contractions by ____.

What is the difference between red and yellow marrow?

Skeletal muscles are attached to bones by cords of connective tissue called tendons .

A single, weak contraction of a muscle fiber is called ____. ​