The major factor in producing hypertonic urine is:
Correct answer: D. Gradual increase in osmolarity from cortex to medullary portion.
- A. Glomerulus.
- B. Influence of aldosterone.
- C. ADH influencing on collecting duct.
- D. Gradual increase in osmolarity from cortex to medullary portion.
Explanation
The major factor in producing hypertonic urine in mammals is gradually increasing osmotic concentration from the cortex to the medulla. Juxtamedullary nephrons are specifically instrumental in the production of concentrated urine via a counter current mechanism which uses high medullary osmolarity.
This question appeared on the UHS MDCAT 2017 paper, which you can sit online with every answer explained.
Report an error
The more specific you are, the faster it gets fixed. A source beats an opinion.
Prefer email? [email protected]
About Kidney and Urinary System
The kidney and urinary system remove nitrogenous wastes, regulate water and ion balance, and help maintain blood pH through filtration, selective reabsorption and secretion. Questions cover nephron structure, ultrafiltration, the loop of Henle, collecting ducts, urine formation and the roles of ADH and aldosterone, while distinguishing excretion from egestion.
Practise Homeostasis
698 free Homeostasis MCQs from Biology, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Discussion
Stuck on an option, or know a faster way to get there? Ask or explain it here.
No comments yet. Be the first to explain this one.
Exams that ask Biology questions like this
Biology is on 8 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
More Kidney and Urinary System questions
When water content in body becomes high, what will happen:
Vessels which carry blood to the glomerulus are called:
Select the part of nephron which is NOT permeable to water and stops its outflow:
What is the least selective process during urine formation:
The capillaries of glomerulus rejoin to form an _.
Pumping denser blood causes the heart to be strained and waste product become cocentrated in the body. What is the cause of problems?