Practice Test Answers
E. Rectus Abdominus
K. Gluteus Maximus
6. a, and d is accepted
1. There are no bones to protect the abdomen because of two reasons. Pregnancy and stomach expansion after meals must allow the surrounding tissue to stretch. Bone does not stretch so instead 3 strong muscles protect the abdomen.
2. Atrophy is the term used for when muscles cells become smaller and the area they previously occupied is overtaken by fat cells. It happens when people don't use a muscle enough. As the common gym phrase goes, "You don't use them, you lose them."
3. The brain sends a message down the spinal cord, through the nerves, and to the muscles. When the signal reaches the muscle it releases myosin and actin. These chemicals make the myofibrils of a cell slide over each other, shortening the muscle and making a contraction.
4. Good muscle tone is when the muscle is always slightly contracted yet feels relaxed. this is common in people that regularly work out and children.
5. Your central nervous system is your brain, spinal cord, and motor nerves. They work together to send electrical impulses (signals) to parts of the body. This makes the body function and be able to react to stimuli.
6. Epithelial tissue can be found in the digestive system.
7. Connective tissue connects, supports, and protects other tissues. Some examples of connective tissue are ligaments, tendons, skin, bone, and even blood.
8. A node is a small part of the heart that sends an electrical impulse that tells the heart to beat. If the node is not working properly it can be surgically replaced by a pacemaker, an artificial node.
9. Smooth muscle can be found in our internal systems. It is also involuntary so those systems will not stop going if we "try" to tell them to.
10. Steroids are illegal drugs that increase muscle mass. In users, liver, kidney, and heart failures are common. They also make the testes become smaller, cause severe mood swings and cancer, and stunt growth by closing the growth centers of a bone.