THE PICTURES FOR QUESTIONS 3,4,6,14,17,AND 18 ARE ATTACHED IN A WORD DOC

 

QUESTION 1

Air pressure is lowest in the lungs during which of the following points during inspiration or expiration?

 

A) End of inspiration, when lung volume is lowest

 

B) End of inspiration, when lung volume is highest

 

C) End of expiration, when lung volume is lowest

 

D) End of expiration, when lung volume is highest

 

QUESTION 2

 

Compared to air in the alveoli, blood in the pulmonary artery contains which of the following?

 

A Higher concentrations of oxygen and lower concentrations of carbon dioxide

 

B Higher concentrations of oxygen and higher concentrations of carbon dioxide

 

C Lower concentrations of oxygen and higher concentrations of carbon dioxide

 

D Lower concentrations of oxygen and lower concentrations of carbon dioxide

 

QUESTION 3

 

In the image above of an alveolus, which structure binds oxygen? (2 points)

 

A

 

B

 

C

 

D

 

 

QUESTION 4

 

This image shows the inside of a human lung. There is a space between the alveolar sac and the capillary where oxygen and carbon dioxide diffuse between the lung and blood. Which structures form this blood-air barrier?

 

A Structures A and B

 

B Structures B and C

 

C Structures C and D

 

D Structures D and B

 

QUESTION 5

 

A student experiences a burning feeling in his chest shortly after eating a meal. Which of the following could cause this symptom?

 

A Hydrochloric acid from the stomach is escaping through the cardiac sphincter into the esophagus.

 

B Hydrochloric acid from the stomach is escaping through the pyloric sphincter into the small intestine.

 

C Bile from the gallbladder is escaping through the pyloric sphincter into the stomach.

 

D Bile from the gallbladder is escaping through the cardiac sphincter into the esophagus.

 

QUESTION 6

 

Based on the image above, which of the following digestive system organs performs both mechanical and chemical digestion?

A

 

B

 

C

 

D

 

 

QUESTION 7

 

As food passes through the alimentary canal, the presence of chemical secretions will occur in which order?

 

A Salivary enzymes; pancreatic juice; pepsin

 

B Salivary enzymes; pepsin; pancreatic juice

 

C Pepsin; pancreatic juice; salivary enzymes

 

D Pepsin; salivary enzymes; pancreatic juice

 

QUESTION 8

 

Which of the following correctly matches pancreatic secretions with their method of transport?

 

A Digestive enzymes-pancreatic duct; hormones-blood

 

B Hormones-pancreatic duct; digestive enzymes-blood

 

C Digestive enzymes-islets of Langerhans; hormones-cystic duct

 

D Hormones-islets of Langerhans; digestive enzymes-cystic duct

  

QUESTION 9

 

Which of the following correctly matches pancreas cells with the function of their secretions?

 

A Hepatocytes-digesting lipids

 

B Hepatocytes-regulating blood sugar

 

C Islets of Langerhan cells-digesting lipids

 

D Islets of Langerhan cells-regulating blood sugar

 

QUESTION 10

 

Which of the following describes the relationship between the villi and the plicae circulares?

 

A The plicae circulares are folds in the mucosa that are lined with villi.

 

B The plicae circulares are folds in the submucosa that are lined with villi.

 

C The villi are folds in the mucosa that are lined with plicae circulars.

 

D The villi are folds in the submucosa that are lined with plicae circulars.

 

QUESTION 11

 

Which of the following is an example of a protein?

 

A Enzymes

 

B Cholesterol

 

C RNA

 

D Starch

 

QUESTION 12

 

Which of the following macromolecule is correctly paired with its monomer?

 

A Carbohydrates-polysaccharides

 

B Carbohydrates-monosaccharides

 

C Proteins-glycerol

 

D Proteins-nucleotides

 

QUESTION 13

 

Jake fell while hiking and sustained a deep cut on his right calf. Which of the following foods will supply the structural component needed for tissue repair?

 

A Beans, because they contain protein

 

B Pasta, because it contains protein

 

C Fruits, because they contain carbohydrates

 

D Cheese, because it contains carbohydrates

 

QUESTION 14

 

The macromolecule pictured above could be part of which of the following?

 

A DNA

 

B Fat

 

C Protein

 

D Enzyme

 

QUESTION 15

 

Which of the following correctly defines "catalyze"?

 

A To bond with an enzyme

 

B To deactivate an enzyme

 

C To increase the rate of a reaction

 

D To change the shape of a substrate

 

QUESTION 16

 

Which of the following correctly describes how cofactors differ from inhibitors?

 

A Cofactors activate substrates, while inhibitors deactivate substrates.

 

B Cofactors deactivate substrates, while inhibitors activate substrates.

 

C Cofactors activate enzymes, while inhibitors deactivate enzymes.

 

D Cofactors deactivate enzymes, while inhibitors activate enzymes.

 

QUESTION 17

 

Image Courtesy of 3DScience.com

The graph above shows the progress of an enzyme-catalyzed chemical reaction. Based on the graph, which of the following is true? (2 points)

 

A An inhibitor is being used in reaction A.

 

B An inhibitor is being used in reaction B.

 

C A substrate is being used in reaction A.

 

D A substrate is being used in reaction B.

 

QUESTION 18

 

 

The graph above shows the progress of an enzyme-catalyzed chemical reaction. Based on the graph, this enzyme (2 points)

 

A works optimally at 5°C

 

B works optimally at 33°C

 

C begins to denature above 25°C

 

D begins to denature below 20°C

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