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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: 802

#Unit 1. Molecules and their Interaction Relevant to Biology

A single-stranded DNA molecule contains 40 nucleotides with equal amounts of A, C, G, and T. This DNA strand can combine with a complementary DNA strand to form a double-stranded DNA molecule. Which is a possible sequence and structure for this DNA molecule?
TLS Online TPP Program

#Question id: 16313

#Unit 7. System Physiology – Animal

Stress in small amounts:
TLS Online TPP Program

#Question id: 28910

#Unit 4. Cell Communication and Cell Signaling

Several condition is responsible for differentiation of canonical and Noncanonical Wnt Pathways, one of them are___
a) destruction protein Dvl
b) their main receptor
c) their co-receptor
TLS Online TPP Program

#Question id: 1389

#Unit 4. Cell Communication and Cell Signaling

 Why has C. elegans proven to be a useful model for understanding apoptosis?
TLS Online TPP Program

#Question id: 8893

#Unit 9. Diversity of Life Forms

While sampling marine plankton in a lab, a student encounters large numbers of fertilized eggs. The student rears some of the eggs in the laboratory for further study and finds that the blastopore becomes the mouth. The embryo develops into a trochophore larva and eventually has a true coelom. These eggs probably belonged to a(n)