Notes

IncorrectQuestion 1
0 / 1 pts
1. The body systems work together to maintain homeostasis. Which statement best defines the term homeostasis?
A. division of cells that make up the body
B. control of the environment outside the body
C. maintaining a balanced and stable environment inside the body
D. removal of waste from the cells of the body

Question 2
1 / 1 pts
2. Which statement best describes the number of bones and muscles in an average adult human?
A. 212 bones and 550 muscles
B. 206 bones and 640 muscles
C. 185 bones and 300 muscles
D. 200 bones and 700 muscles

Question 3
1 / 1 pts
3. In science class, Rupert learns about the different systems of the human body. What are three functions of the system shown below?

bone 1

A. transporting oxygen, support, and organ protection
B. gas exchange, digestion, and movement
C. waste removal, gas exchange, protection from germs
D. support, organ protection, and movement

Question 4
1 / 1 pts
4. What is the name of the bone labeled with a star in the diagram below? It is the longest bone in the body.

Bone 2

A. fibula
B. tibia
C. femur
D. humerus

Question 5
1 / 1 pts
5. Body systems interact – which means they work together. What is the major interaction between the muscular system and the skeletal system?
A. bones – specifically the ribs – protect the lungs
B. muscles attach to the bones and move them around a joint
C. muscles help make red blood cells for the bones
D. bones help get carbon dioxide out of the muscles

IncorrectQuestion 6
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6. Skeletal muscles are attached to bones to allow movement. Skeletal muscles have a striped appearance. The image below shows a magnified view of skeletal muscle. Which of the following is true of skeletal muscles?

bone 3

A. Skeletal muscles are an example of cardiac muscle.
B. Skeletal muscles are an example of smooth muscle.
C. Skeletal muscles are an example of voluntary muscle.
D. Skeletal muscles are an example of involuntary muscle.

Question 7
1 / 1 pts
7. Smooth muscles control involuntary body movements. In which of the following body structures would you find smooth muscle?
A. jaw and lips
C. upper arm
B. esophagus and stomach
D. lower leg

IncorrectQuestion 8
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8. Muscles often work together in pairs to produce movement, as shown by the arrow in the diagram below. When the biceps contracts and gets shorter, what does the triceps do?

bone 4

A. it contracts and gets short
B. it relaxes and gets shorter
C. it contracts and gets longer
D. it relaxes and gets longer

Question 9
1 / 1 pts
9. All muscles work by ____________________________________.
A. contracting and relaxing
B. creating energy
C. twisting and shortening
D. adding cells

Question 10
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10. The skeletal system interacts with several other systems in the body. Which of the following describes one of these interactions?
A. helps the cardiovascular system by supplying energy
B. helps the digestive system by creating acids
C. helps the nervous system by protecting the brain
D. helps the respiratory system by supplying it with water

IncorrectQuestion 11
0 / 1 pts
11. Which of the following examples best describes the skeletal and muscular systems working together to maintain homeostasis?
A. legs running to escape a burning house.
B. an eye moving and focusing to see an oncoming car.
C. hand and arm moving to open a door.
D. blood being pushed through the body to deliver oxygen to cells.

IncorrectQuestion 12
0 / 1 pts
12. A group of physical fitness trainers wanted to know which group of muscles in the body is the strongest. They tested four different muscle groups – lower leg, upper leg, lower arm, and upper arm.They collected data from 50 males that were the same age and same size. The maximum amount of weight lifted by each muscle group was recorded. The evidence showed that the upper leg was the strongest group. What is the dependent variable in this experiment?
A. The four muscle groups
B. The 50 people.
C. The maximum amount of weight lifted.
D. Age and size of the people