« previous next »

Author Question: What substances in segmented neutrophils are important for intracellular killing of bacteria? a. ... (Read 19 times)

viki

  • Hero Member
  • *****
  • Posts: 525
on: Jun 25, 2018
What substances in segmented neutrophils are important for intracellular killing of bacteria?
 
  a. Alkaline phosphatase and halides
  b. Myeloperoxidase and superoxide
  c. Collagenase and hydrogen peroxide
  d. Acid phosphatase and anions

Question 2

CD34 is an antigen found on which one of the following cells?
 
  a. Myeloblast
  b. Segmented neutrophil
  c. Eosinophil
  d. Lymphocyte


cici

  • Sr. Member
  • ****
  • Posts: 325
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: B
Bacteria killing is a complex mechanism, requiring activation of the neutrophil, ingestion of the bacterium, and incorporation into a phagosome. Cytoplasmic granules fuse with the lysosome and dump their contents. Myeloperoxidase, halides, hydrogen peroxide, and the formation of superoxide and oxygen radicals are all instrumental for killing. Also critical for killing is activation of proteinases such as cathepsin G.

Answer to Question 2

ANS: A
CD34 is found on the myeloblast and also the promyelocyte, but it is downregulated as the cell continues to mature and is not found on mature cells of any lineage.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

Always store hazardous household chemicals in their original containers out of reach of children. These include bleach, paint, strippers and products containing turpentine, garden chemicals, oven cleaners, fondue fuels, nail polish, and nail polish remover.

Did you know?

Cucumber slices relieve headaches by tightening blood vessels, reducing blood flow to the area, and relieving pressure.

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Campylobacter bacteria are found in most chicken meat. If chicken meat is not well cooked or raw mea Campylobacter bacteria are found in most chicken meat. If chicken meat is not well cooked or raw mea
Bacteria Bacteria
Synthesis of Phosphatidic acid and CDP-diacylglycerol in bacteria Synthesis of Phosphatidic acid and CDP-diacylglycerol in bacteria
Traits Bacteria and Archaea Share Traits Bacteria and Archaea Share
Gene-transfer processes in bacteria Gene-transfer processes in bacteria
ATP, an important energy currency in cells ATP, an important energy currency in cells
Video: Role of the respiratory system - effect of altered ventilation rates

For a complete list of videos, visit our video library