Exam 41: Action and Support: the Muscles and Skeleton

What would happen to a person who was poisoned with a chemical that blocks the production of neurotransmitters at neuromuscular junctions?

The site of communication between a neuron and a muscle fiber is called a

Describe the functions of the three types of bone cells.

What two types of contractions do smooth muscles perform?

At a joint, the end of a skeletal muscle that is attached to the bone that moves is known as the origin.

Which of these muscle components is the smallest?

Many people hope that they will one day be able to travel into space for extended periods of time. What are the health risks to the bones and muscles of those people interested in such "space vacations"?

Action potentials stimulate the sarcoplasmic reticulum to release chloride ions into the muscle cell.

Skeletal muscle

During embryonic development, the skeleton is initially made of _ , which is later replaced by bone.

The end of a skeletal muscle that is attached to a stationary, fixed bone is the origin. The end of a skeletal muscle that is attached to a movable bone is called the

In a muscle that is resistant to fatigue, such as that of a marathon runner, you would expect

Which of these animals is correctly matched with its type of skeleton?

After falling down a flight of stairs, it feels like you broke your ankle; however the emergency room doctor says you tore a ligament. This means you tore the

A joint that is movable in only two dimensions, such as the elbow, is called a joint.

Motor units are all of the sarcomeres that make up a muscle fiber.

Muscles used for activities that require fine motor control, such as holding and writing with a pencil, have

Earthworms and slugs move by

Cnidarians have what type of skeleton?

Where are the largest motor units in human muscles located?