Concept explainers
To discuss:
The term for the microscopic functional units of the kidney, and their approximate number per kidney.
Introduction:
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- Fatty tissue holds the kidneys in place. Extremely rapid weight loss may cause this tissue to shrink so that the kidneys slip from their normal position. On rare occasions, the slippage can put a kink in one or both ureters and block urine flow. Suggest what might then happen to the kidneys.arrow_forwardPart of Structure of the wall Role in (cells, their appearance, formation arrangement) the nephrone of urinearrow_forwardKIDNEY FUNCTION IN REGULATION OF RENAL BLOOD FLOW, FLUIDS VOLUME AND REGULATION OF ENDOCRINEarrow_forward
- Once micturition reflex is initiated, the individual will not be able to control the urge to urinate and sphincters cannot be willfully contracted. True or false and whyarrow_forwardthe fine network of blood vessels which surrounds all of the tubules of the nephron is called the __________.arrow_forwardTo say that your body has somatic control over your external urethral sphincter that means you can ________ control that sphincter.arrow_forward
- Renal tubules cannot reabsorb HCO3–; yet HCO3–concentration in the tubular fluid falls while in the blood plasma itrises. Explain this apparent contradiction.arrow_forwardWhich glomerular arteriole is larger, and why? the efferent, because it increases hydrostatic pressure in the glomerulus the efferent, because it increases colloid oncotic pressure in the glomerulus the afferent, because it increases hydrostatic pressure in the glomerulus the afferent, because it increases colloid oncotic pressure in the glomerulusarrow_forwardGlomerular colloid osmotic pressure is greater in the afferent end than in the efferent end of the glomerular capillary regardless of the change in filtration fraction. True or false and why.arrow_forward
- The cells lining the nephron component marked by the black asterisk 1. bind the 'parathyroid hormone' to increase the reabsorption of calcium ions from the filtrate into peritubular capillary blood 2. Function to regulate pH of the blood by secreting bicarbonate ions and reabsorbing hydrogen ions 3. bind the hormone 'aldosterone' to increase sodium reabsorption from the filtrate (with passive reabsorption of water) Choose from the following: (A) 1 (B) 2 (C) 3 (D) 1 and 2 (E) 2 and 3 (F) 1, 2, and 3arrow_forwardJuxtamedullary nephrons none of these have very short nephron loops. make up about 80-85% of the nephrons within the kidney. O allows excretion of very concentrated urine.arrow_forwardThe functional unit of the kidney is called a(an) ______________.arrow_forward
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