,2
,Question 4. Question : Where in the lung does gas exchange occur?
Trachea
Segmental bronchi
Alveolocapillary membrane
Main bronchus
Explanation: Gas exchange occurs only across the alveolocapillary membrane.
Question 5. Question : The tonic neck reflex observed in a newborn should no longer be
obtainable by:
2 years
1 year
, 10 months
5 months
Explanation: The tonic neck reflex should be unobtainable by 5 months of age.
Question 6. Question : When renin is released, it is capable of which action?
Inactivation of autoregulation
Direct activation of angiotensin II
Direct release of antidiuretic hormone (ADH)
Formation of angiotensin I
Explanation: When renin is released, it cleaves an -globulin (angiotensinogen
produced by liver hepatocytes) in the plasma to form angiotensin I.