Glucose reabsorption is a two-step process: 

Na+-glucose cotransport across the luminal membrane 

Facilitated glucose transport across the peritubular membrane

TLS Online TPP Program

#Id: 9171

#Unit 11. Evolution and Behavior

Determining allelic frequencies at equilibrium

      

TLS Online TPP Program

#Id: 9538

#Unit 11. Evolution and Behavior

TLS Online TPP Program

#Id: 2351

#Unit 5. Developmental Biology

If the planarian is cut in half, the anterior portion of the lower half regenerates a head while the posterior of the upper half regenerates a tail. 

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#Id: 3180

#Unit 3. Fundamental Processes

A mitochondrion divides by developing a ring around the organelle that constricts to pinch it into two halves. The mechanism is similar in principle to that involved in bacterial division.

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#Id: 4965

#Unit 6. System Physiology – Plant

Reversal of etiolation

Etiolated plants are those that have been grown in the dark, light stimulates increased [cytokinin] which stimulates cell division and greening.

increases [GA] which presumably stimulates IAA oxidase production to get rid of excess IAA that causes the long spindly growth.

IAA stimulates ethylene synthesis which maintains the apical hook, treating the apical hook with red light + ethylene maintains the hook.