,2
, The resulting pain is severe.
Benign tumors are not encapsulated.
Benign tumors are fast growing.
The cells are well-differentiated.
Explanation: A benign tumor is well-differentiated with its tissue appearing similar to
the tissue from which it arose. The other options are characteristic of a
malignant tumor.
Question 5. Question : Which compensatory mechanism is spontaneously used by
children diagnosed with tetralogy of Fallot to relieve hypoxic
spells?
Lying on their left side
Performing the Valsalva maneuver
Squatting
Hyperventilating
, Explanation: Squatting is a spontaneous compensatory mechanism used by older children
to alleviate hypoxic spells. Squatting and its variants increase systemic
resistance while decreasing venous return to the heart from the inferior vena
cava. The other options would not result in these changes.
Question 6. Question : Which cytokines initiate the production of corticotropin-releasing
hormone (CRH)?
IL–1 and IL-6
IL-2 and TNF-
IFN and IL-12
TNF-ß and IL-4
Explanation: Although a number of stress factors initiate the production of CRH, of the
options available, only high levels of IL-1 and IL-6 initiate such a response.