# As Biology Paper2 2019 Q2.3

Scientists measured the oxygen-carrying capacity of seal blood. They found the haemoglobin in a 190kg seal contained 10700cm3 oxygen. When the seal dived, it used 5.2 cm3 oxygen per minute per kg of body mass. Use this information to calculate the maximum number of minutes the seal can remain underwater. Assume that all of the oxygen attached to the haemoglobin is released during the dive.
How do I find the answer to this question?
Original post by TheGingerCarrot

Thank you
To find the answer to this question, we need to calculate how long the total amount of oxygen in the seal's blood will last, given the rate at which the seal uses oxygen.

So for that, you gotta,

1. First, we need to calculate the total oxygen consumption rate of the seal. This is given by the oxygen consumption per minute per kg of body mass, multiplied by the total body mass of the seal.

2. Then, we divide the total amount of oxygen in the seal's blood by the total oxygen consumption rate. This will give us the total time the seal can remain underwater.

Now mate, you can get the calculations done :

1. Total oxygen consumption rate = Oxygen consumption per minute per kg * Body mass
= 5.2 cm³/min/kg * 190 kg
= 988 cm³/min

2. Total time the seal can remain underwater = Total oxygen in blood / Total oxygen consumption rate
= 10700 cm³ / 988 cm³/min
= 10.83 minutes

Soooo, the seal can remain underwater for approximately 10.83 minutes.
Original post by Smith17
Scientists measured the oxygen-carrying capacity of seal blood. They found the haemoglobin in a 190kg seal contained 10700cm3 oxygen. When the seal dived, it used 5.2 cm3 oxygen per minute per kg of body mass. Use this information to calculate the maximum number of minutes the seal can remain underwater. Assume that all of the oxygen attached to the haemoglobin is released during the dive.
How do I find the answer to this question?