Exam 28: The Digestive and Urinary Systems

In a study on the bacteria found in human mouths,from the Mesolithic to present day,researchers found that Streptococcus mutans,a bacterium associated with tooth decay,is

If you placed cells from a marine alga in freshwater,you would expect to see that 

If you detected large amounts of ammonia in mammalian urine,you would know that the mammal in question had serious problems with liver and urinary functions.

Energy is one of the resources obtained by heterotrophs when they eat.

A gram of carbohydrate yields the same amount of calories as in a gram of

The major excretory organ of the human urinary system is the

In sequence of their occurrence,the four major steps that vertebrate organisms use to obtain and use food are

The steroid hormone produced by the adrenal cortex that raises blood pressure is

The homeostasis of water in organisms is affected by

The passage of food needs to occur in a controlled way,so the body contains rings of muscle in the digestive tract that regulate the movement of food.These are 

Since small amounts of ammonia are very toxic,mammals convert ammonia to urea for concentration before excretion occurs.

Bile sequestrants are drugs that bind to bile in the intestines and prevent its normal reabsorption in the large intestine.How would bile sequestrants lower a patient's blood cholesterol level?

Animals that consume decaying organic matter as their main source of food are