A. They provide structural support to type 1 cells
B. They secrete surfactant, a chemical that helps the alveoli stay open
C. They also participate in gas exchange
D. All of these
(A) Hard Disc
(B) RAM
(C) ROM
(D) Processor
(A) Germany
(B) United States of America
(C) Denmark
(D) Russia
(A) Uzbekistan and Liechtenstein
(B) Uzbekistan and Chad
(C) Uzbekistan and Mali
(D) Liechtenstein and Chad
(A) 2nd
(B) 3rd
(C) 4th
(D) 5th
(A) $43-M
(B) $53-M
(C) $63-M
(D) $73-M
(A) Russia
(B) Germany
(C) USA
(D) UK
(A) Badin
(B) Thatta
(C) Dadu
(D) Khairpur
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