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Objectives 1. Describe the nature of osmosis. 2. Define osmotic pressure in terms of solute concentration through van’t Hoff’s law. 3. Define the driving forces that control water movement across membranes. 4. Explain how fluid movement across a capillary wall is determined by a balance of hydrostatic and osmotic pressures. 5. Explain how cell volume changes in response to changing concentrations of permeant and impermeant solutes…
Objectives 1. Define diffusion as the migration of molecules down a concentration gradient. 2. Recognize that diffusion is the result of the purely random movement of molecules. 3. Define the concepts of flux and membrane permeability and the relationship between them. Diffusion is the migration of molecules down a concentration gradient Experience tells us that molecules always move spontaneously from a region where they are more…
Objectives 1. Recognize the need to maintain the constancy of the internal environment of the body and the concept of homeostasis. 2. Describe the hierarchical view of the body as an ensemble of distinct compartments. 3. Describe the composition and structure of the lipid bilayer membranes that encompass cells and organelles. 4. Explain why the protein-mediated transport processes that regulate the flow of water and solutes…
LEARNING OBJECTIVES Upon completion of this chapter, the student should be able to answer the following questions: 1 Describe the general anatomical components of the male and female reproductive system. 2 Map out the organization of the testis, with the Sertoli cells and developing sperm cells within the intralobular compartment, and the Leydig cells and capillary plexus within the interlobular/interstitial compartment. 3 Illustrate the processes of…
Learning Objectives Upon completion of this chapter, you should be able to answer the following questions : 1 Describe the anatomy and microscopic anatomy of the adrenal gland, including the chromaffin cells of the adrenal medulla and the three zones of the adrenal cortex. 2 Explain the enzymatic reactions involved in generating norepinephrine and epinephrine and integrate those reactions with the regulation of epinephrine synthesis and…
Learning Objectives Upon completion of this chapter, the student should be able to answer the following questions : 1 Describe the anatomy and histology of the thyroid gland, including the structure of the thyroid follicle. 2 Explain how thyroid hormones are synthesized within the thyroid gland, including the processes of iodine uptake, iodination of tyrosine residues in thyroglobulin by thyroid peroxidase/dual oxidase, and coupling to form…
Learning Objectives Upon completion of this chapter, the student should be able to answer the following questions : 1 Describe the structure and composition of the pituitary gland and its structural and functional relationship to magnocellular and parvocellular hypothalamic neurons. 2 Discuss the mechanisms by which the neurohormones antidiuretic hormone (ADH) and oxytocin are synthesized, transported, and released by magnocellular neurons. 3 Diagram a basic scheme…
Learning Objectives Upon completion of this chapter the student should be able to answer the following questions: 1 Describe the pool of serum calcium and phosphate, including ionized, complexed, and protein bound. Describe the normal concentration ranges of these ions and the major routes of influx and efflux. 2 Discuss the role of the parathyroid gland in the regulation of serum calcium and explain the role…
Learning Objectives Upon completion of this chapter, the student should be able to answer the following questions: 1 Explain the different requirements for and utilization by different cells of fuels during the digestive phase as opposed to the interdigestive and fasting phases. 2 Integrate the structure, synthesis, and secretion of insulin with circulating fuel levels, especially glucose. 3 Utilize the different signaling pathways regulated by insulin…
Learning Objectives Upon completion of this chapter, the student should be able to answer the following questions : 1 Name the major endocrine glands and their hormonal product or products. 2 Map out and differentiate a simple endocrine negative feedback loop and one involving the hypothalamus, anterior pituitary and peripheral endocrine gland, and list the major endocrine glands under each type of feedback loop. 3 Define…
Learning Objectives Upon completion of this chapter the student should be able to answer the following questions : 1 How does HCO 3 − operate as a buffer, and why is it an important buffer of the extracellular fluid? 2 How does metabolism of food produce acid and alkali, and what effect does the composition of the diet have on systemic acid-base balance? 3 What is…
Learning Objectives Upon completion of this chapter, the student should be able to answer the following questions : 1 How does the body maintain K + homeostasis? 2 What is the distribution of K + within the body compartments? Why is this distribution important? 3 What are the hormones and factors that regulate plasma K + levels? Why is this regulation important? 4 How do the…
Learning Objectives Upon completion of this chapter the student should be able to answer the following questions : 1 Why do changes in water balance alter [Na + ] of extracellular fluid (ECF)? 2 How is the secretion of arginine vasopressin (AVP) controlled by changes in the body fluid osmolality, blood volume, and systemic blood pressure? 3 What cellular events are associated with the AVP action…
Learning Objectives Upon completion of this chapter, the student should be able to answer the following questions : 1 What three processes are involved in the production of urine? 2 What is the composition of “normal” urine? 3 What transport mechanisms are responsible for NaCl reabsorption by the nephron? Where are they located along the nephron? 4 How is water reabsorption “coupled” to NaCl reabsorption in…
Learning Objectives Upon completion of this chapter the student should be able to answer the following questions : 1 Which structures in the glomerulus are filtration barriers to plasma proteins? 2 What is the physiological significance of the juxtaglomerular apparatus? 3 What blood vessels supply the kidneys? 4 What nerves innervate the kidneys? 5 What is the location of the kidneys, and what are their gross…
Learning Objectives Upon completion of this chapter, you should be able to answer the following questions: 1 What are the major metabolic functions of the liver? 2 How does the liver contribute to detoxification, and what types of metabolites does it excrete? 3 What are the main cell types of the liver and how are they organized to subserve the function of the organ? 4 How…
LEARNING OBJECTIVES Upon completion of this chapter, you should be able to answer the following questions: 1 What are the segments of the large intestine? 2 How is motility of the large intestine controlled, and how does this subserve its physiological function? 3 How is water and electrolyte transport in the large intestine controlled, and how does it differ from the process in the small intestine?…
Learning Objectives Upon completion of this chapter, you should be able to answer the following questions: 1 What are the mechanisms that regulate gastric emptying to match nutrient delivery to the digestive and absorptive capacity of the small intestine? 2 What are the characteristic secretory products of the exocrine pancreas, from which cell types do they arise, and how is secretion regulated? 3 What is the…
Learning Objectives Upon completion of this chapter, you should be able to answer the following questions: 1 What are the major functions of the stomach? 2 What are the gross functional regions of the stomach? 3 What is the role of the gastric epithelium in digestion and absorption? 4 What is the role of the proton pump in parietal cell function? 5 What are some examples…
LEARNING OBJECTIVES Upon completion of this chapter, you should be able to answer the following questions: 1 What constitutes the functional anatomy of salivary glands, including their secretory elements? 2 What are the cephalic and oral phases (what, why, how it happens) of the response to a meal? 3 What are the general principles of secretion along the gastrointestinal (GI) tract (where do secretions come from,…