Question

Karen eats a bowl of salty fries that contains 2500 mg of NaCl, and does not drink any fluids. The questions refer to how Karen's physiological systems are affected and respond after eating fries. (a) Calculate the final extracellular fluid (ECF) osmolarity, after osmosis between the intracellular fluid (ICF) and ECF has occurred. Information that you may need to answer this question is below. Show all your work. ECF volume = 15 L ICF volume = 25 L Initial osmolarity of ECF = 290 mOsM Initial osmolarity of ICF = 290 mOsmM Molecular weight of NaCl = 60 g/mol (b) State the name of hormone or hormones affected by Karen's ingestion of fries. In addition, state the factors affecting the release of this hormone or these hormones and the effects the hormone or hormones will have in Karen's body as it attempts to achieve homeostasis.

Answer 1

A.

B. Antidiuretic hormone (vasopressin) is released when the osmolality of the serum changes and decreased blood volume.
C Vasopressin release is triggered by: increased osmolality of the serum sensed by the osmoreceptors of the hypothalamus, low blood volume. Its effects include: 1. binds toaquaproin receptors (V2) on principal cells in the collecting of the kidney and increases water absorption, 2. V1 receptors monitor the blood pressure. Both these mechanisms strive to increase the total body water and maintain blood pressure and thereby perfusion to the organs.