A.   hypothermia

B.   the lowering of a set point

C.   negative feedback

D.   positive feedback 

E.   hibernation

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

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

C.   the constant state of the body

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

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

A.   be stored temporarily as glycogen 

B.   be converted into fructose and linked together

C.   be broken down into simple sugars

D.   serve as a buffer

E.   be converted into starch

A.   a  lipid.

B.   a nucleotide.

C.   a carbohydrate.

D.   a protein. 

A.   ventricles. 

B.   veins.

C.   arteries.

D.   lungs.

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

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

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

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.   pharynx.

C.   alveoli. 

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.   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. 

C.   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.

D.   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.

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

A.   the trachea 

B.   the bronchioles

C.   the tracheoles

D.   the alveoli

A.   is stored energy unavailable to do work.

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

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

D.   contains less energy than kinetic energy.

E.   transfers motion to matter.

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

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

C.   You always eat more food than you need.

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

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

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

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

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.   hydrolysis, active transport, and the light reactions

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

C.   glycolysis, oxidation, and the Calvin cycle reactions 

D.   substrate inhibition, catabolism, and fermentation

E.   None of the above is correct.