BIOL 2402: Exam 4 Flashcards
Air moves out of the lungs when the pressure inside the lungs is .
greater than the pressure in the atmosphere
The relationship between gas pressure and gas volume is describes by .
The statement " in a mixture of gases, the total pressure is the sum of the individual partial pressures of gases in the mixture" paraphrases .
Surfactant helps to prevent the aveoli from collapsing by .
interfering with the cohesiveness of water molecules, thereby reducing the surface tension of alveolar fluid.
With the Bohr effect, more oxygen is released because an .
decrease in pH (acidosis) weakens the hemoglobin-oxygen bond
The local matching of blood flow with ventilation is .
The most powerful respiratory stimulus for breathing in a health person is .
increase of carbon dioxide
The pyloric sphincter regulates passage of chyme from the stomach into the duodenum.
Tidal volume is air .
exchange during normal breathing
Possible causes of hypoxia include .
too little oxygen in the atmosphere
Which statement about CO2 is incorrect?
more CO2 dissolves in the blood plasma than is carried in the RBCs.
Oxygen and carbon dioxide are exchanged in the lungs and through all cell membranes by .
How is the bulk of carbon dioxide carried in blood?
as the bicarbonate ion in the plasma after first entering the red blood cells
What does NOT influence hemoglobin saturation?
Smoking diminishes ciliary action and eventually destroys cilia.
Alcohol id first absorbed at the .
The type of tooth responsible for tearing and shredding is the .
The function of the hepatic portal circulation is to .
collect absorbed nutrients for metabolic processing or storage.
What hormone causes an increased output of enzymes-rich pancreatic juice and stimulates gallbladder contraction to release bile?
This statement is true concerning the number and type of permanent teeth:
there are 32 permanent teeth, and the wisdom teeth are the last to emerge.
Saliva does NOT .
contain enzymes that begin the breakdown of proteins
Hydrochloric acid is secreted by the of the stomach.
There are three phases of gastric secretion. The cephalic phase occurs .
before food enters the stomach and is triggered by aroma, sight, or thought.
Pepsinogen, a digestive enzyme, is secreted by the .
chief cells of the stomach
You have just eaten a meal high in complex carbohydrates. What enzymes will help to digest the meal?
The ducts that deliver bile and pancreatic juice from the liver and pancreas, respectively, unite to form the .
What vitamin requires intrinsic factor in order to be absorbed?
Digestion of would be affected the most if the liver was damaged
What is an essential role played by large intestine bacteria?
synthesize vitamin K and B-complex vitamins
Surgical cutting of the ligual frenulum would occur in the part of the body.
The part of the peritoneum that covers the external surfaces of most digestive organs is the visceral peritoneum.
What part of the tooth bears the force of chewing?
portal triads contain a branch of the hepatic artery, hepatic portal vein and bile duct.