Which statement about the effect of age on the lymphatic-immune system is not true?

A. The thymus gland enlarges.
B. The level of thymic hormones decreases.
C. There are fewer antigen-presenting cells.
D. There are fewer helper T cells.
E. Red bone marrow mass decreases.


Answer: A

Anatomy & Physiology

You might also like to view...

The work of breathing normally requires about 3% of total energy expenditure, this increases under all of the following situations except

a. when elastic recoil is decreased. b. when resistance goes up. c. when the partial pressure of oxygen decreases in the air. d. when ventilation must be increased. e. it increases with all of the above

Anatomy & Physiology

Which of the following training methods requires knowledge of how experts would respond to the issues covered in training?

A. role playing B. programmed instruction C. business games D. behavioral modeling

Anatomy & Physiology

The most movable joints are ________ joints.

A. symphysis B. synchondrosis C. gomphosis D. synovial E. syndesmosis

Anatomy & Physiology

Higher brain centers can influence pituitary secretions, and therefore, target organ secretion.

Answer the following statement true (T) or false (F)

Anatomy & Physiology