NEET PG Exam > NEET PG Notes > Pathology > Mind Map: Kidney and Urinary Bladder -1
Mind Map: Kidney and Urinary Bladder -1
FAQs on Mind Map: Kidney and Urinary Bladder -1
| 1. What are the primary functions of the kidneys in the human body? |  |
Ans. The kidneys perform several essential functions, including the filtration of blood to remove waste products and excess substances, regulation of electrolyte balance, maintenance of acid-base homeostasis, regulation of blood pressure through the renin-angiotensin-aldosterone system, and production of hormones such as erythropoietin, which stimulates red blood cell production.
| 2. How does the urinary bladder function in the storage and expulsion of urine? | |
Ans. The urinary bladder is a muscular sac that stores urine until it is ready to be expelled. It has a capacity of about 300-500 mL. When the bladder fills, stretch receptors send signals to the brain, prompting the urge to urinate. Upon voluntary contraction of the bladder's detrusor muscle and relaxation of the external urethral sphincter, urine is expelled through the urethra.
| 3. What are common diseases affecting the kidneys and urinary bladder? | |
Ans. Common kidney diseases include chronic kidney disease, glomerulonephritis, kidney stones, and urinary tract infections (UTIs). For the urinary bladder, common conditions include cystitis (bladder inflammation), bladder stones, and bladder cancer. Each condition varies in symptoms and requires specific diagnostic and treatment approaches.
| 4. How do the kidneys regulate blood pressure? | |
Ans. The kidneys help regulate blood pressure through the renin-angiotensin-aldosterone system (RAAS). When blood pressure drops, the kidneys release renin, an enzyme that converts angiotensinogen to angiotensin I. Angiotensin I is then converted to angiotensin II, which causes blood vessels to constrict and stimulates the release of aldosterone from the adrenal glands, leading to sodium and water retention, thus increasing blood volume and pressure.
| 5. What role do electrolytes play in kidney function and urine formation? | |
Ans. Electrolytes, including sodium, potassium, chloride, and bicarbonate, are crucial for maintaining fluid balance, nerve function, and muscle contractions. The kidneys regulate the levels of these electrolytes in the blood by filtering them during urine formation. They reabsorb necessary electrolytes and excrete excess ones to maintain homeostasis, significantly influencing urine composition and volume.
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