The Nervous System — Unit test Answers

Gunther touched a hot object and received a minor burn. How did the skeletal system help prevent further damage?

Which level of organization falls directly after the tissue level when listed in order from least to most complex?

The brain and spinal cord work together so the body can receive signals and react to the environment. What is the spinal cord?

Which best describes the muscular system?

When calcium levels in the blood are too low, the body releases a hormone that removes calcium from the bones. A person who suffers from a certain type of thyroid disease will often have low blood calcium and brittle bones because the body is taking the calcium from the bones. The afflicted person will typically see an endocrinologist, who studies hormones, and an orthopedist, who studies bones. What do these two doctors have in common?

How will Richard’s body react when a friend jumps in front of him and scares him?

What is the main component of the thin filaments in muscle fibers and is responsible for muscle contraction?

Which organ systems work together to help the body shiver in order to maintain homeostasis?

Which best describes the top and bottom images of muscle contraction?

What is the main function of the central nervous system?

The body obtains sugar from food. Which system most directly affects blood sugar levels?

Which person’s function in a school is similar to the central nervous system’s role in a human body?

How is a brain injury classified?

What is the function of the type of muscle that is pictured below?

Which description applies to hinge joints?