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Renal System O1
Renal Gross Anatomy/Microanatomy
Question | Answer |
---|---|
Four major types of tissues that make up the human body | Muscle, Nervous, Connective, Epithelial |
Epithelial tissue is found in 3 places | Covers or lines all surfaces, cavities and tubes; Perenchyma: functional portion of solid organs; Stroma: connective tissue for support |
Fuctions of epithelial tissue | Selective diffusion, absorption, secretion, physical protection, containment |
What is the one thing that all epithelial tissues have that the other three types of tissue do not? | Basement membrane |
Describe a basement membrane | Separates epithelia from supporting tissue, avascular, selective barrier to passage of materials |
Cell modifications that relate to specific epithelial tissue functions | Cilia, Microvilli, Goblet cells, Basolateral interdigitations |
What is a brush border? | Extends the surface area of the apical border of the epithelial cell |
What are basolateral interdigitations | Extends the surface area of the lateral and basal borders of the epithelial cell and is the location for the sodium pump |
List the 4 types of cell junctions | Tight junctions(occluding junctions), Zonula adherens (adhering belt), macular adherens (desmosomes), communicating junctions (gap junctions) |
Diffusion requiring a concentration gradient | Passive Diffusion |
Diffusion with protein carrier molecules | Facilitated |
Transport requiring ATP | Active |
Transport using membrane receptors | Transmembrane signaling |
Components of a nephron | Renal corpuscle, PCT, Loop of Henle, DCT |
Glomerulus is a group of what? | Fenestrated capillaries |
Podocytes with many processes on a basement membrane are contained in the | Visceral layer of bowmans capsule |
What is the main function of the renal corpuscle? | Filtration |
Where are filtered glucose and amino acids mainly reabsorbed | PCT |
What cell modifications are seen in the PCT | Brush border and basolateral interdigitations |
What is the main function of the Loop of Henle? | Generates a high osmotic pressure in the extracellular fluid of the renal medulla |
Epithelium found in Thin loop of henle | Simple squamous epithelium |
Epithelium found in thick loop of henle | Simple Cuboidal epithelium with extensive basolateral interdigitations |
The DCT is under control of | Aldosterone |
Structures of the Juxtaglomerular apparatus | Afferent arteriole, DCT, macula densa, extraglomerular mesangial cellls, juxtaglomerular cells |
Which cells secrete renin | Juxtaglomerular cells |
Which cells are sensitive to sodium ion concentrations? | Macula densa |
Transitional epithelium is found in the | Ureter and Urinary bladder |