Review Of Both Systems

Question 1

Intrinsic factor is an essential substance produced by the stomach that is critical for which of the following:

Answer 1

Absorption of vitamin B12 in the intestines needed for red blood cell development and maturation.

Question 2

All of the following are true statements regarding the lymphatic vessels except:

Answer 2

-They return excess tissue fluid to the venous circulation.

• Fluid enters the lymphatic capillaries from low pressure to high pressure.

-They carry triglycerides building blocks absorbed by the digestive tract to the circulation.

-Fluid enters the lymph capillaries through one way valves formed by overlapping endothelial cells.

-They help to recycle the interstitial fluid that is filtered out of the blood during capillary exchange.

Question 3

The spleen:

Answer 3

-is the graveyard for the red blood cells and stores some of the iron from broken down RBC§.
-is one place in body that stores blood platelets.

Only filters blood NOT lymph

Question 4

Which of the following secretes enzymes that help with chemical digestion of all of the food types (carbs, lipids, protein and nucleic acids) we ingest?

Answer 4

Pancreas

Question 5

Which of the following statements is an incorrect or false statement about MHC proteins?

Answer 5

-Class I MHC proteins are found on the surface of all nucleated body cells.

-Class I MHC proteins are found on the surface of specific cells called antigen-presenting cells.

• B cells have to bind to Class II MH proteins to become activated.

-Cytotoxic T cells bind to Class I MHC proteins.

-Helper T cells bind to Class II MHC proteins.

Question 6

Select the correct statement regarding digestive processes.

Answer 6

Gastrin increases stomach gastric secretion/motility and the motility of the ileum, while contributing to the relaxation of the ileocecal valve.

Question 7

All of the following are important stimuli in the gastric phase of gastric secretion except:

Answer 7

*Increase in the release of the hormone secretin by the stomach

-Food arriving in stomach

-Stretch of the stomach walls with the presence of food

-Arrival of peptides in the stomach

-Release of the hormone gastrin by G cells.

Question 8

Which of the following statements is a true statement about B cells (lymphocytes)?

Answer 8

B cells can present antigens to T helper cells.