Question

1. besides water, what are two waste products found in urine?

a.
b.

1. how do you know when your bladder needs to be emptied?
2. whats the word for the ring-like muscle that contracts to prevent urine from escaping the bladder unless you want it to?

Explanation:

For question 14, the two most common waste products in urine besides water are nitrogenous wastes that the body excretes. For question 15, the body sends a specific sensory signal when the bladder is full. For question 16, the ring-like muscle controlling bladder outflow is a specific sphincter muscle.

Answer:

14.
a. Urea
b. Uric acid (or creatinine)

1. You feel a strong urge to urinate (a sensation of fullness in the lower abdomen).
2. Urethral sphincter (internal urethral sphincter, specifically)