# Biology calculation

Watch
Announcements
#1
Tests on the man whose blood was used to construct Figure 8 gave the following data.
Concentration of haemoglobin in blood = 150 g dm^-3.
Volume of oxygen carried by fully saturated haemoglobin = 1.35 cm^3 g^-1.
Resting heart rate = 60 beats per minute.
Volume of blood pumped out of left ventricle every beat = 60 cm^3.

Use these data and information from Figure 8 to calculate the volume of oxygen released to the man's tissues per minute whilst he was at rest.

I can't find an official mark scheme answer but according to a quizlet set mine is wrong. I did this:
saturation of Hb with oxygen (which will then be released to tissues)= 38%
60x60=3600cm^3min^-1
Oxygen saturation: (38/100)x1.35=0.513 cm^3g^-1
haemoglobin volume:0.150x3600=540gmin^-1
then finally the volume of oxygen =540x1.35=729cm^3min^-1

The percentage saturation seems quite high but I really don't see how it can be much lower on the graph (attached)
Last edited by learningizk00l; 1 month ago
0
1 month ago
#2
Oxygen saturation: (38/100)x1.35=0.513 cm^3g^-1
haemoglobin volume:0.150x3600=540gmin^-1
then finally the volume of oxygen =540x 0.513 =277cm^3min^-1
1
#3
(Original post by deskochan)
Oxygen saturation: (38/100)x1.35=0.513 cm^3g^-1
haemoglobin volume:0.150x3600=540gmin^-1
then finally the volume of oxygen =540x 0.513 =277cm^3min^-1
oops yeah that's what i meant
thanks
0
X

new posts
Back
to top
Latest
My Feed

### Oops, nobody has postedin the last few hours.

Why not re-start the conversation?

see more

### See more of what you like onThe Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

### Poll

Join the discussion

#### How would you feel if uni students needed to be double vaccinated to start in Autumn?

I'd feel reassured about my own health (30)
15.63%
I'd feel reassured my learning may be less disrupted by isolations/lockdowns (60)
31.25%
I'd feel less anxious about being around large groups (23)
11.98%
I don't mind if others are vaccinated or not (16)
8.33%
I'm concerned it may disadvantage some students (11)
5.73%
I think it's an unfair expectation (49)
25.52%
Something else (tell us in the thread) (3)
1.56%