Table of Contents
Do mammals produce concentrated urine?
The mammalian kidney is an intricate, highly specialized structure having, as one of its important functions, a capability to produce highly concentrated urine.
What produces highly concentrated urine?
The renal medulla produces concentrated urine through the generation of an osmotic gradient extending from the cortico-medullary boundary to the inner medullary tip.
Why do mammals have concentrated urine?
Mammalian kidneys play an essential role in balancing internal water and salt concentrations. When water needs to be conserved, the renal medulla produces concentrated urine.
Which part do animals use to excrete urine?
urethra
For example, in mammals, urine is expelled through the urethra, which is part of the excretory system.
Which of the following is a way that an animal can concentrate their urine?
Animals vary in the U/P ratios that can be achieved by their kidneys and thus in how concentrated their urine can be. Mammals, birds, and insects are the only animals that can produce concentrated urine with an osmotic U/P ratio exceeding 1.0.
Which of these has the highest concentration in the urine Mcq?
Answer: The correct answer is Urea. Urine is a liquid waste produced by the kidneys and released out by body. It is composed of 91-96% of water. Out of the solid constituents of urine, urea is found in the highest concentration.
What animal secretes urine through its skin?
Urea transporter Most fish excrete through their gills, and some amphibians and lungfish may excrete through their skin, but the Chinese soft-shelled turtle’s oral habit is almost certainly a one-off.
How the filtrate is concentrated in mammals?
A counter current mechanism operates between the two limbs of the loop of Henle and those of vasa recta (capillary parallel to Henle’s loop). The filtrate gets concentrated as it moves down the descending limb but is diluted by the ascending limb.
How urine is formed in mammals?
Primary urine is formed by filtration from the blood. From this primary urine certain substances are reabsorbed into the blood and other substances are secreted into the primary urine from the blood. The word secretion is used by renal physiologists to imply transport, other than by filtration, from the blood to urine.
Why do camels have concentrated urine?
This concentrated urine not only serves to conserve water, but also allows camels to drink water which is more concentrated than sea water (above 3% NaCl), and to eat salty plants (halophytes) that would otherwise be toxic.
Which animals can produce urine that is more concentrated than their body fluids?
Mammals and birds are the only vertebrates able to produce urine with a higher osmotic concentration than their body fluids. These vertebrates are therefore able to excrete their waste products in a small volume of water, so that more water can be retained in the body.