KCET · BIOLOGY · STD 11 - 15. Body Fluids and Circulation

In a typical heart, if EDV is 120 mL of blood and ESV is 50 mL of blood, the stroke volume (SV) is

A 120-50=70 mL
B 120+50=170mL
C 120×50=6000 ml
D 120\(\div\)50=2.4 mL

Verified Solution

Answer & Solution

Correct Answer

(A) 120-50=70 mL

Step-by-step Solution

Detailed explanation

(A) 120-50=70 mL,
The stroke volume (SV) is the volume of blood ejected from the ventricles of the heart with each beat. It is calculated by subtracting the end-systolic volume (ESV) from the end-systolic volume (ESV) from the end-diastolic volume (EDV). Here, SV=EDV-ESV-12mL-50mL-70 mL..

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

Same subject

Match the items listed under Column-I with those given under Column-II. Choose the appropriate option from the given choices.

Column-I	Column-II
A. Residual volume (RV)	p. 4000ml-4600ml
B. Inspiratory Reserve Volume (IRV)	q. 1100ml-1200ml
C. Vital capacity (VC)	r. 1000ml-1100ml
D. Expiratory Reserve Volume (ERV)	s. 3000ml-3500ml
E Inspiratory capacity (IC)	t. 2500 ml-3000ml

KCET 2014 Medium

Explore more questions on app

From KCET

Explore more questions on app

Column I	Column II
A. Phycomycetes	i. Pencillium
B. Ascomycetes	ii. Alternaria
C. Vibrium	iii. Albugo
D. Deuteromycetes	iv. Puccinia