A person forms 1.2 L of urine in a day, at an even rate…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
A person forms L of urine in a day, at an even rate.
- How many millilitres of urine form in each hour?
- How many hours does it take to collect mL?
- How many millilitres are in the bladder after hours?
Need a reminder? The key ideaShow
Urine runs from the kidney down the ureter to the bladder. When the bladder is stretched, stretch receptors send signals to the CNS. The CNS sends motor messages: the bladder muscle contracts and the urethral sphincter relaxes. This is micturition. An adult passes to L of urine a day, slightly acidic (pH about ), with to g of urea. Glucose in the urine is glycosuria, and ketone bodies are ketonuria. Both point to diabetes mellitus.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Given. Urine: L a day, at an even rate.
Plan. Find the rate in mL an hour. Then use it for the time and the volume.
Step 1. The rate. mL. mL an hour.
Step 2. The time. h.
Step 3. After hours. mL.
Answer: mL an hour; h; mL.
Check. In hours the bladder holds mL, and in hours two thirds of that, which is mL.
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