Question

Arrange the following statements in the correct order in which they occur during the formation and removal of urine in human beings. (a) Ureters carry urine to the urinary bladder. (b) Wastes dissolved in water are filtered out as urine in the kidneys. (c) Urine stored in the urinary bladder is passed out through the urinary opening at the end of the urethra. (d) Blood containing useful and harmful substances reaches the kidneys for filtration. (e) Useful substances are absorbed back into the blood.

Answer 1

Formation and removal of urine in human beings:

The above statements can be arranged as follows:

(d) Blood containing useful and harmful substances reaches the kidneys for filtration.

1. Blood is filtered by the urinary system, which also produces urine as a waste product.
2. The ureters, bladder, kidneys, renal pelvis, and urethra are among the urinary system's organs.
3. They are primarily responsible for removing toxins from the blood and turning waste into urine.

(e) Useful substances are absorbed back into the blood.

1. On passive transporters, glucose, amino acids, and other chemicals diffuse out of the epithelial cell along concentration gradients before being reabsorbed by the blood capillaries.
2. To keep homeostatic plasma concentrations, the nephron must reabsorb the majority of the Ca++, Na+, glucose, and amino acids.
3. As waste products, other chemicals like urea, K+, ammonia (NH3), creatinine, and certain medicines are secreted into the filtrate.

(b) Waste dissolved in water is filtered in urine as urine.

1. Our kidneys filter extra fluid and waste from our blood into the urine-collecting tubules of the kidney so that they can be expelled from our body.
2. Blood is filtered by the urinary system, which also produces urine as a waste product.
3. Unwanted compounds are removed from the circulation by the kidneys, which also create urine to do so.
4. Urine is produced in three stages: glomerular filtration, reabsorption, and secretion.
5. These procedures make sure that the body is solely expelled from waste and extra water.

(a) The urethra carries urine to the bladder.

1. Urethra: Urine can travel through this tube and leave the body.
2. Urine leaks from the bladder as a result of the brain's tightening signal to the bladder muscles.
3. In order to allow urine to pass from the bladder through the urethra, the brain sends a signal to the sphincter muscles to loosen up.

( c) Urine stored in the urinary bladder passes through the urethra at the end of the urethra.

1. Urine leaks from the bladder as a result of the brain's tightening signal to the bladder muscles.
2. In order to allow urine to pass from the bladder through the urethra, the brain sends a signal to the sphincter muscles to loosen up.
3. Normal urination takes place when all the signals take place in the appropriate order.
4. The sphincter, a ring-shaped muscle that controls how much urine leaves the bladder and enters the urethra, relaxes when a person wants to urinate.
5. This allows urine to exit the body through the urethra.

Thus, the correct order would be d, e, b, a, and c.