FE2

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Penn Foster College *

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INORGANIC

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Biology

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Jan 9, 2024

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docx

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12

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1. After eating, the hormone _____________ signals the hypothalamus to suppress appetite ? Leptin 2. Inhibition of which hormones action may help in weight loss? Ghrelin 3. Carbohydrates, proteins, and fats are classified as ? Macroutrients 4. What compound replenishes cellular glucose supplies once supplies are depleted ? Glycogen 5. What components form a triglyceride? Glycerol and 3 fatty acids 6. A negative nitrogen balance results from a net loss of __________. ? Amino Acids 7. How many essential amino acids are needed by adults? 8
8. Deficiency of vitamin A causes ? Night Blindness 9. Treatment with antibiotic drugs is sometimes followed by a deficiency of vitamin __________. ? Vitamin K 10. Excess intake of which vitamin could possibly lead to irreversible renal damage ? Vitamin D 11. What condition can result from excess calcium in the diet ? a. Deposition of calcium in soft tissue 12. What is the effect of potassium deficiency in the body? Cardiac Arrhythmia a. Chapter 20 13. function of the kidneys ? Acid base balance / Water balance/ Maintains Electrolyte balance/ Toxins removal and waste / Controls Blood pressure/ EPO/ Activates Vitamin D 14. The renal corpuscle includes what two structures ?
15. Glomerulus & and Glomerular Capsule 16. A nephron consists of ? Renal Corpuscle & Renal Tubule 17. A renal corpuscle is a _________? Cluster of blood capillaries and Glomerular capsule 18. whereas a renal tubule is a __________. ? Highly coiled tubule exiting the glomerular capsule 19. The first capillary bed associated with the nephron allows for ? Filtration of blood 20. Once in the glomerular capsule, the filtrate then moves into ? Renal Tubule 21. The reabsorption of glucose occurs primarily through the walls of? Proximal Tubule 22. What occurs when plasma glucose concentration exceeds the renal plasma threshold ? Glucose appears in the urine
23. When sodium ions are reabsorbed through the wall of the renal tubule by active transport, chloride ions are ? Reabsorbed by Passive Transport 24. The hormone ADH promotes water reabsorption through the wall(s) of ? Distal Tubule & collecting duct 25. How and where are hydrogen ions secreted ? Actively into the entire renal tubule 26. In which region of the nephron is water actively transported across the membrane ? Collecting Duct 27. Which of the following is a normal constituent of urine ? a. Creatinine b. Describe the countercurrent mechanism of the nephron loop? Water moves out of the descending limb, and sodium moves out of the ascending limb 28. As a result of very low arterial blood pressure, glomerular hydrostatic pressure __________ and filtration rate __________. ? Decrease & Decrease
29. What is the function of the countercurrent mechanism in the nephron ? Creates a highly concreated interstitial fluid so urine can be concentrated by the colleducting ducts 30. Aldosterone from the adrenal cortex causes sodium ions to be ___(1)___ and potassium ions to be _____(2)_____. ? 31. (1). Conserved 32. (2). Excreted 33. What is renal clearance ? The rate substances is removed from the blood 34. What changes in afferent and efferent vessel diameter can result in an increase in the glomerular filtration rate ? Both vasodilation of the afferent arteriole and vasoconstriction of the efferent arteriole. 35. The juxtaglomerular apparatus regulates the filtration rate by ? causing vasoconstriction of both the afferent and efferent arterioles 36. What is an adaptation of the epithelial cells of the proximal tubule that enhances reabsorption? Microscopic projections are called microvilli.
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