18. p 19. pH-7.4 Pco2 40 mmHg - END OF ACID-BASE MULTIPLE CHOICE- Enter your ans

Question

18. p 19. pH-7.4 Pco2 40 mmHg - END OF ACID-BASE MULTIPLE CHOICE- Enter your answer (legibly) on the ans 20. If blood osmolality rises metabolie albaloss Norma A B. ADH is released Thirst sensation is inhibited Urine becomes dilute 21. The following chemicals will all increase blood pressure A. Aldosterone B.Atrial natriuretic peptide (ANP) C. Renin D. Angiotensin II All of the following will normally be filtered in the glo kidney EXCEPT A. Glucose B. Na ions C. Free fatty acids 22. Platelets E. Water F. Amino acids G. Urea

Explanation / Answer

20. A. ADH is released.

Increase in blood osmolality raises the osmotic pressure of blood and volume of blood decreases. This will stimulate osmoreceptors in hypothalamus which in turn causes secretion of ADH. This hormone will causes increased absorption of water from renal tubules into blood leading to production of concentrated urine.

21. A. Aldosterone.

Angiotensin II, a powerful vasoconstrictor stimulates the cells of adrenal cortex to release Aldosterone. This hormone increases reabsorption of Na+ in ascending limb DCT and CD. Reabsorption of Na+ in blood causes reabsorption of water leading to increase in blood volume and bkood pressure.

22. D. Platelets.

Ultrafiletration is non selective so ultrafilterate contaisn both waste products as well as some useful substances. It contains Na+, glucose,amino acids, urea, uric acid, water. Itsvcomposition resembles that of plasma except that ultrafikterate does not contain blood protiens and blood cells.

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