TLS Online TPP Program

#Question id: 11706


Antidiuretic hormone (ADH) and the renin-angiotensin-aldosterone system (RAAS) work together in maintaining osmoregulatory homeostasis through which of the following ways?

#Unit 7. System Physiology – Animal
  1. ADH regulates the osmolarity of the blood by altering renal reabsorption of water, and the RAAS maintains the osmolarity of the blood by stimulating both Na+ and water reabsorption.
  2. ADH and the RAAS work antagonistically; ADH stimulates water reabsorption during dehydration, and the RAAS causes increased excretion of water when it is in excess in body fluids.
  3. Both stimulate the adrenal gland to secrete aldosterone, which increases both blood volume and pressure via its receptors in the urinary bladder.
  4. ADH and the RAAS combine at the receptor sites of proximal tubule cells, where reabsorption of essential nutrients takes place.
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TLS Online TPP Program

#Question id: 11484

#Unit 7. System Physiology – Animal

Two students studying physiology taste a known "bitter" substance, and both report sensing bitterness. They then sample another substance. Student A reports sensing both a bitter taste and a salty taste, but student B reports only a salty taste. What is the most logical explanation?

TLS Online TPP Program

#Question id: 11485

#Unit 7. System Physiology – Animal

In the odorant cells of mammals, specific odorants are detected by binding to _______

TLS Online TPP Program

#Question id: 11486

#Unit 7. System Physiology – Animal

The contraction of skeletal muscles is based on ________

TLS Online TPP Program

#Question id: 11487

#Unit 1. Molecules and their Interaction Relevant to Biology

Glycosidic bonds have Ф, Ψ and w angles due to

TLS Online TPP Program

#Question id: 11488

#Unit 1. Molecules and their Interaction Relevant to Biology

If approximately 415 kJ/mol of energy is being used to break a bond in a monosaccharide molecule then

A. That monosaccharide is undergoing conformational change

B. That monosaccharide is undergoing configurational change

C. That monosaccharide is undergoing mutarotation to change into other form

D. That monosaccharide is undergoing epimerisation to change into other form

Which of the above statements is/are correct for a molecule to change with an expense of that much of energy?

TLS Online TPP Program

#Question id: 11489

#Unit 1. Molecules and their Interaction Relevant to Biology

Why Trehalose does cannot get oxidized at its anomeric carbon