Skeletal System
What is the primary function of the skeletal system?
It provides support and protection for the body, helps enable movement, stores minerals, and produces blood cells.
What type of muscle tissue is primarily responsible for voluntary movement of the skeleton?
Skeletal muscle tissue.
What is the basic functional cell of the nervous system that transmits electrical signals?
A neuron.
What organ pumps blood throughout the body?
The Heart.
In which structures of the lungs does most gas exchange between the air and blood occur?
The alveoli.
How do bones and skeletal muscles work together to produce movement?
Skeletal muscles attach to bones by tendons and contract to pull on bones, while joints allow the bones to move.
During exercise, why does a skeletal muscle need ATP?
ATP provides the energy needed for muscle contraction, including the interaction and cycling of actin and myosin.
When you quickly move your hand away from a hot surface, what nervous-system mechanism allows this response to happen rapidly?
A reflex arc allows sensory information to trigger a rapid motor response, often through the spinal cord before the brain fully processes the sensation.
Why does heart rate generally increase during exercise?
Working muscles need more oxygen and nutrients and produce more metabolic waste, so the cardiovascular system increases blood flow to meet those demands.
Why does breathing become faster and deeper during vigorous exercise?
The body increases ventilation to bring in more oxygen and remove carbon dioxide produced by active muscles.