Leaky-barrel model

What will be an ideal response?


An analogy for the settling-point model of body-fat regulation
(1) the amount of water entering the hose is analogous to the amount of food available to the subject;
(2) the water pressure at the nozzle is analogous to the positive-incentive value of the available food;
(3) the amount of water entering the barrel is analogous to the amount of energy consumed;
(4) the water level in the barrel is analogous to the amount of energy being expended;
(5) the amount of water leaking from the barrel is analogous to the amount of energy being expended;
(6) the weight of the barrel on the hose is analogous to the strength of the satiety signal

Biology & Microbiology

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Which of the following are mechanisms to prevent polyspermy?  

_____  altering composition of exterior egg coat _____  change in membrane potential of egg _____  cortical granule enzymes remove sperm receptors from egg _____  special proteins inside the egg compare the DNA of different sperm, choosing the most adapted one _____  toxic molecules exit the egg to attack extra sperm _____  vitelline envelopes lift off surface of egg

Biology & Microbiology

Which of the following is caused by nicotine in cigarette smoke?

A) faster heart rate B) constriction of blood vessels C) increased stickiness of platelets D) Nicotine causes all of the above.

Biology & Microbiology

Which type of vascular tissue conducts carbohydrates?

A. sclereids B. collenchyma cells C. xylem D. phloem E. fibers

Biology & Microbiology

Adding untreated sewage to a freshwater lake would cause the biochemical oxygen demand to

A) increase. B) decrease. C) stay the same. D) The answer cannot be determined based on the information provided.

Biology & Microbiology