Question

which of the following is not a main role of the skeletal system?
produces materials your body needs
a
b
allows body to move
c
protects internal organs
d
aids in the absorption of digestion

1. when you increase a muscles endurance, you

decrease the length and flexibility of the muscle.
a
b
increase the thickness and size of the muscle.
c
increase the overall strength of the muscle.
d
increase the amount of time it can contract without tiring.
3.
the most important step you can take to care for your nervous system is to
get lots of sleep.
a
b
exercise regularly.
c
protect it from injury.
d
eat a diet rich in vegetables.
4.
messages, or impulses, are carried from one part of your body to another by ______.
muscles.
a
b
bones.
c
glands.
d
neurons.

Explanation:

1. For the skeletal system question: The skeletal system enables movement, protects organs, and produces blood cells (a body need). Aiding digestion absorption is a role of the digestive system, not skeletal.
2. For muscle endurance: Muscle endurance refers to how long a muscle can work without fatigue; muscle size/strength relates to hypertrophy, not endurance.
3. For nervous system care: While sleep, exercise, and diet support it, preventing physical injury (like head/spinal trauma) is the most critical step to avoid permanent nervous system damage.
4. For body impulses: Neurons are specialized cells that transmit electrical and chemical signals (impulses) throughout the body; muscles, bones, and glands do not carry these messages.

Answer:

1. D. aids in the absorption of digestion
2. D. increase the amount of time it can contract without tiring.
3. C. protect it from injury.
4. D. neurons.