A.   hibernation

B.   the lowering of a set point

C.   hypothermia

D.   negative feedback

E.   positive feedback 

A.   the varying of the body state within a narrow range

B.   the ability to maintain an absolutely constant internal body state

C.   the constant state of the body

D.   . the ability to produce heat and maintain an internal temperature.

E.   the ability to maintain the internal body state within a narrow range 

A.   be converted into fructose and linked together

B.   be converted into starch

C.   be broken down into simple sugars

D.   serve as a buffer

E.   be stored temporarily as glycogen 

A.   a protein. 

B.   a carbohydrate.

C.   a nucleotide.

D.   a  lipid.

A.   lungs.

B.   arteries.

C.   veins.

D.   ventricles. 

A.   Diffusion does not occur in organisms that have more than about 300 cells 

B.   Humans do not need as much oxygen as small organisms do, so we use inefficient transport systems like the circulatory system rather than diffusion.

C.   Humans need an internal transport system in order to quickly replace oxygen that is lost because of our high surface area of skin

D.   Diffusion is very slow over all but the shortest distances, so oxygen must be delivered to our cells to speed up the process

A.   bronchi.

B.   alveoli. 

C.   pharynx.

D.   trachea.

A.   Oxygen diffuses from the air into the deoxygenated (“used”) blood in the capillary beds, and carbon dioxide diffuses from that blood to the alveoli.

B.   Carbon dioxide is moved by active transport from the lungs to the deoxygenated (“used”) blood in the capillary beds, and oxygen diffuses from the blood to the alveoli.

C.   Oxygen is moved by active transport from the lungs to the deoxygenated (“used”) blood in the capillary beds, and carbon dioxide is moved by active transport from the blood to the alveoli. 

D.   Carbon dioxide diffuses from the air into the deoxygenated (“used”) blood in the capillary beds, and oxygen diffuses from the blood to the alveoli.

E.   Oxygen is moved by active transport from the lungs to the deoxygenated (“used”) blood in the capillary beds, and carbon dioxide diffuses from the blood to the alveoli.

A.   the alveoli

B.   the trachea 

C.   the tracheoles

D.   the bronchioles

A.   is stored energy unavailable to do work.

B.   transfers motion to matter.

C.   contains less energy than kinetic energy.

D.   is kinetic energy that has not yet been turned to heat.

E.   is contained in matter placed in certain positions or arrangements. 

A.   Not all that you ingest is digested and absorbed, this “leftover” must be eliminated. 

B.   You always eat more food than you need.

C.   Digestion increases the volume of food that initially enters the body.

D.   The exit of the digestive system, known as the urinary tract, is needed to get rid of liquids you don't digest.

E.   None of the above are correct.

A.   We must process nutrients in order to absorb them. 

B.   The absorptive surface of our gut lets all materials pass through it into the bloodstream.

C.   We are able to directly absorb most large nutrient molecules such as starch.

D.   The human gut is able to absorb complex proteins easily.

A.   break down food physically.

B.   carry food to the stomach. 

C.   break down food chemically.

D.   prepare undigested material and waste for disposal.

A.   stomach

B.   salivary glands

C.   liver 

D.   pancreas

A.   glycolysis, the reactions on the electron transport chain, and the Krebs (citric acid) cycle

B.   substrate inhibition, catabolism, and fermentation

C.   hydrolysis, active transport, and the light reactions

D.   glycolysis, oxidation, and the Calvin cycle reactions 

E.   None of the above is correct.