« previous next »

Author Question: What is the normal bone marrow cellularity in the population older than 65 years? a. 90 b. 70 ... (Read 36 times)

jazziefee

  • Hero Member
  • *****
  • Posts: 505
on: Jun 25, 2018
What is the normal bone marrow cellularity in the population older than 65 years?
 
  a. 90
  b. 70
  c. 50
  d. 30

Question 2

Why is there a relative lymphocytosis in a 2 year old?
 
  a. An absolute neutropenia occurs.
  b. The absolute number of lymphocytes is increased as the immune system develops.
  c. A greater proportion of neutrophils are marginated.
  d. Fewer lymphocytes are marginated.


mathjasmine

  • Sr. Member
  • ****
  • Posts: 312
Reply #1 on: Jun 25, 2018
Answer to Question 1

ANS: D
Bone marrow cellularity decreases in the older population and is approximately 30. That of a young adult is 50. This change may be caused by an increase in the volume of spongy tissue in the bone, as well as an increase in fat, rather than an actual decrease in hematopoietic tissue.

Answer to Question 2

ANS: B
An absolute increase in lymphocytes occurs, presumably because the immune system is developing as more antigens are encountered; this increases the absolute number of lymphocytes, as well as the relative percent. The number of marginated neutrophils is not increased; lymphocytes do not marginate.


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
« previous next »
 

Did you know?

The first oncogene was discovered in 1970 and was termed SRC (pronounced "SARK").

Did you know?

The first successful kidney transplant was performed in 1954 and occurred in Boston. A kidney from an identical twin was transplanted into his dying brother's body and was not rejected because it did not appear foreign to his body.

Did you know?

In 1885, the Lloyd Manufacturing Company of Albany, New York, promoted and sold "Cocaine Toothache Drops" at 15 cents per bottle! In 1914, the Harrison Narcotic Act brought the sale and distribution of this drug under federal control.

Did you know?

Children of people with alcoholism are more inclined to drink alcohol or use hard drugs. In fact, they are 400 times more likely to use hard drugs than those who do not have a family history of alcohol addiction.

Did you know?

Every flu season is different, and even healthy people can get extremely sick from the flu, as well as spread it to others. The flu season can begin as early as October and last as late as May. Every person over six months of age should get an annual flu vaccine. The vaccine cannot cause you to get influenza, but in some seasons, may not be completely able to prevent you from acquiring influenza due to changes in causative viruses. The viruses in the flu shot are killed—there is no way they can give you the flu. Minor side effects include soreness, redness, or swelling where the shot was given. It is possible to develop a slight fever, and body aches, but these are simply signs that the body is responding to the vaccine and making itself ready to fight off the influenza virus should you come in contact with it.

Possible Earth 5 billion years from now Possible Earth 5 billion years from now
Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski Blood glucose measurement. A postprandial test may be self-administered. (a) A lance pierces the ski
Focus on Older Adults Focus on Older Adults
Life Cycle Nutrition: Toddlers through the Later Years Life Cycle Nutrition: Toddlers through the Later Years
The ability to solve problems may be highly efficient in the older adult The ability to solve problems may be highly efficient in the older adult
Normal (A) and Abnormal (B) Balance between Dopamine and Acetylcholine Normal (A) and Abnormal (B) Balance between Dopamine and Acetylcholine
Video: Sex-Linked Traits! How are eye colors inherited in fruit flies?

For a complete list of videos, visit our video library