The ascending limb, both the thin & the thick segments

is virtually impermeable to water, a characteristic that is important for concentrating the urine.

TLS Online TPP Program

#Id: 3710

#Unit 2. Cellular Organization

if an individual has only one a gene, the excess b chains form the unusual tetramer b4, which causes hemoglobin H (HbH) disease. The complete absence of a genes results in hydrops fetalis, which is fatal at or before birth.

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#Id: 9955

#Unit 4. Cell Communication and Cell Signaling

Subcutaneous infections are normally introduced by trauma and accompanied by inflammation; when inflammation is chronic, extensive tissue damage may ensue. 

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#Id: 4012

#Unit 7. System Physiology – Animal

The inherent leakiness of the sinus nodal fibers to sodium and calcium ions causes their self-excitation.

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#Id: 2030

#Unit 8. Inheritance Biology

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#Id: 2585

#Unit 7. System Physiology – Animal

Function of the two exchangers is to transport NaCl from the lumen into the cell:

Na+-H+ exchanger

Cl−-formate− anion exchanger