Rowan College of South Jersey, Sewell

BIO 107There are 2 extra credit points available if you choose to sample your own urine in addition to the two
samples provided.
Pre-laboratory Questions
1. Because blood is filtered in the kidneys and travels through very small thin-walled
blood vessels, what might be detected in the urine of an individual with high blood
pressure?
We might find blood
2. What can healthy people do to prevent kidney stones?
3. Why is urine darker in the morning than later in the day?
We haven’t had water in 7-9 hours and because of this our bodies are holding on to the
water we do have in our systems because we need it.
4. If pure water has a specific gravity of 1, why is the specific gravity of urine higher?
There is more than just water in urine.
Data Table 1: Specific gravity of urine
Standard urine Abnormal urine Real urine (optional)
20 30
Data table 2: Chemical values of the urine samples
Value Synthetic standard
urine
Synthetic abnormal
urine
Real urine
pH
5 5
Glucose
normal 1,000 mg/dL
Ketones
Neg. Neg.
Leukocytes
Neg. Neg.