PLTW HBS 3.1-3.2 REVIEW QUESTIONS
What are the three resources the body needs to survive? - Answer -oxygen, water, and
food
How long can you survive without each of the resources? - Answer -oxygen- 3 minutes
water- 3 days
food- 3 weeks
What role does water play in the human body? - Answer -removes bad substances,
provides energy, and temperature balance, water is a carrier, maintains homeostasis
What role does oxygen play in the human body? - Answer -cellular respiration-> energy
(ATP)
How do personal factors and environmental factors impact the body's ability to survive
without the 3 necessary resources? - Answer -Personal- weight, how much you sweat,
body disorders
Environmental- rigor, temperature, altitude
What are the main functions of the digestive system? - Answer -to mechanically and
chemically digest food
What is the function of the salivary glands? - Answer -produce saliva and keep mouth
and other digestive system parts moist
What is a bolus? - Answer -rounded mass of substance
What mechanical and chemical digestion occurs in the oral cavity? - Answer -
Mechanical- chewing
Chemical- saliva breaking down food
What mechanisms are in place to make sure food does not "go down the wrong tube"
and into the windpipe? - Answer -epiglottis separates the esophagus from the trachea
What is peristaltic movement and how does it function in the esophagus? - Answer -a
muscle contraction that brings food to the esophagus
What is chyme and how does the stomach mix this material? - Answer -acidic fluid
passing from the stomach to the small intestine; combines food, enzymes, and gastric
fluids
What are sphincters and how are they related to the stomach? - Answer -openings in
and out of the stomach
What are the three resources the body needs to survive? - Answer -oxygen, water, and
food
How long can you survive without each of the resources? - Answer -oxygen- 3 minutes
water- 3 days
food- 3 weeks
What role does water play in the human body? - Answer -removes bad substances,
provides energy, and temperature balance, water is a carrier, maintains homeostasis
What role does oxygen play in the human body? - Answer -cellular respiration-> energy
(ATP)
How do personal factors and environmental factors impact the body's ability to survive
without the 3 necessary resources? - Answer -Personal- weight, how much you sweat,
body disorders
Environmental- rigor, temperature, altitude
What are the main functions of the digestive system? - Answer -to mechanically and
chemically digest food
What is the function of the salivary glands? - Answer -produce saliva and keep mouth
and other digestive system parts moist
What is a bolus? - Answer -rounded mass of substance
What mechanical and chemical digestion occurs in the oral cavity? - Answer -
Mechanical- chewing
Chemical- saliva breaking down food
What mechanisms are in place to make sure food does not "go down the wrong tube"
and into the windpipe? - Answer -epiglottis separates the esophagus from the trachea
What is peristaltic movement and how does it function in the esophagus? - Answer -a
muscle contraction that brings food to the esophagus
What is chyme and how does the stomach mix this material? - Answer -acidic fluid
passing from the stomach to the small intestine; combines food, enzymes, and gastric
fluids
What are sphincters and how are they related to the stomach? - Answer -openings in
and out of the stomach
