Skeletal System
What is the main function of the skeletal system?
The skeletal system provides support and protection, allows movement with muscles, stores minerals, and produces blood cells.
What type of muscle tissue is responsible for voluntary movement of the body?
Skeletal muscle
What is the basic functional cell of the nervous system?
Neuron
What organ pumps blood throughout the body?
The heart
What is the main function of the respiratory system?
To bring oxygen into the body and remove carbon dioxide.
How do bones and skeletal muscles work together to produce movement?
Muscles attach to bones by tendons and contract to pull on bones, causing movement at joints.
What happens to a skeletal muscle when it contracts, and how does this produce movement?
The muscle fibers shorten and pull on their attached tendons and bones, producing movement at a joint.
Why is the nervous system important during physical activity?
It sends signals that coordinate muscle contractions, movement, sensory information, and changes in body functions during exercise.
Why does heart rate increase during exercise?
Heart rate increases to pump more blood and deliver more oxygen and nutrients to working muscles.
Where does gas exchange occur in the lungs, and what happens during this process?
Gas exchange occurs in the alveoli, where oxygen moves into the blood and carbon dioxide moves from the blood into the lungs to be exhaled.