TLS Online TPP Program

#Question id: 20290


What are the factors that inhibits glucagon secretion?

#Unit 7. System Physiology – Animal
  1. Somatostatin
  2. Increased amino acid concentration
  3. Decreased glucose concentration
  4. β-Adrenergic agonists
More Questions
TLS Online TPP Program

#Question id: 10493

#Unit 6. System Physiology – Plant

Which wavelength modulates guard cell osmoregulation by means of its activation of proton pumping, solute uptake, and stimulation of the synthesis of organic solutes;

TLS Online TPP Program

#Question id: 10491

#Unit 6. System Physiology – Plant

Acidification of the lumen stimulates zeaxanthin formation, and alkalinization favors violaxanthin formation. Lumen pH depends on photosynthetic photon flux density, most effective at

TLS Online TPP Program

#Question id: 10490

#Unit 6. System Physiology – Plant

Which of the following is a correct Match of the stomatal opening and closing mechanism;

COLUMN ACOLUMN B
P- Opening of Stomatai) Chloride anions are taken up into the guard cells from the apoplast
Q- Closing of stomataii) The malate content of guard cells decreases
iii) starch content in guard cells increases during end of the
iv) Acidification of the lumen stimulates zeaxanthin formation which activates the H+ ATPase causing
v) Accumulation of solute in vacuole such as sucrose and malate leads to

TLS Online TPP Program

#Question id: 10489

#Unit 6. System Physiology – Plant

Malate anions, by contrast, are synthesized in the guard cell cytosol, in a metabolic pathway that uses carbon skeletons generated by

TLS Online TPP Program

#Question id: 10488

#Unit 6. System Physiology – Plant

Blue light activates a proton pump at the guard cell plasma membrane. The relationship between proton pumping at the guard cell plasma membrane and stomatal opening is evident from the observations that;

 a.) Orthovandate inhibits the fusicoccin-stimulated opening

 b.) fusicoccin stimulates both proton extrusion from guard cell protoplasts and stomatal opening

 c.) CCCP inhibits the fusicoccin-stimulated opening

 d.) CCCP, a proton ionophore that makes the plasma membrane highly permeable to protons resulting stomatal opening

 Which one of the following observation from the above statements should  be correct?

TLS Online TPP Program

#Question id: 10487

#Unit 6. System Physiology – Plant

During the patch clamp experiments measure outward electric current in picoamps, pA at the plasma membrane of a guard cell protoplast stimulated by two points A and B showing in the graph.

What is A and B