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TLS Online TPP Program
#Question id: 18009
#Unit 7. System Physiology – Animal
Fleeing from or confronting a threat is known as ______.
TLS Online TPP Program
#Question id: 10877
#Unit 7. System Physiology – Animal
A 27-year-old man is breathing quietly. He then inhales as much air as possible and exhales as much air as he can, producing the spirogram shown in the previous figure. What is his expiratory reserve volume (in liters)?
TLS Online TPP Program
#Question id: 19697
#Unit 13. Methods in Biology
How to record through limb lead II in ECG?
TLS Online TPP Program
#Question id: 19357
#Unit 13. Methods in Biology
BAC vectors are based on _________ plasmid.
TLS Online TPP Program
#Question id: 12181
#Unit 2. Cellular Organization
Following statements are regarding to the CFTR.
A. cystic fibrosis transmembrane conductance regulator allows Cl− ions to flow out of the cell, following their concentration gradient.
B. ATP binding to CFTR’s two nucleotide-binding domains appears to close the Cl− channel, and the hydrolysis of one ATP opens it (the other ATP remains intact).
C. the CFTR channel can open only if its regulatory domain (which is unique among ABC transporters) has been phosphorylated, thus regulating the flow of ions across the membrane.
D. The maintenance of electrical neutrality requires that the Cl− ions transported by the CFTR be accompanied by positively charged ions, mainly Na+. The transported ions are osmotically accompanied by water, thus maintaining the proper level of fluidity in secretions of the airways, intestinal tract, and the ducts of the pancreas, testes, and sweat glands.
Which of the following combination is correct?