MCQ ON CIRCULATORY PATHWAYS class 11 for NEET | CIRCULATORY PATHWAYS class 11| MCQ CIRCULATORY PATHWAYS with Answer | Check the below NCERT MCQ question for class 11Biology based on the with Answers.
MCQ on CIRCULATORY PATHWAYS class 11Biology with answers were prepared based on the latest pattern. We have provided class 11 Biology MCQs question with Answers to help students understand the concept very well.
MCQ ON CIRCULATORY PATHWAYS is useful for NEET / CSIR / UGC / CBSE / ICSE / AIIMS / EXAM / AFMC EXAM / STATE LEVEL MEDICAL EXAM/ KVS PGT BIOLOGY / NVS PGT BIOLOGY EXAM 2023-2024 ,2025
INTRODUCTION:-
CIRCULATORY PATHWAYS
THE CIRCULATORY PATTERNS ARE OF TWO TYPES:
Open and closed circulatory system.
Open circulatory system is present in arthropods and molluscs in which blood pumped by the heart pass through large vessel into open space or body cavities called sinuses .
This pattern is consider to be more advantages as the flow of fluid can be more precisely regulated .
Annelida and chordata have a closed circulatory system in which the blood pumped by the heart is always circulated through a closed network of blood vessels .
ELECTROCARDIOGRAPH :-
ECG is a graphical representation of the electrical activity of the heart during a cardiac cycle.
Each peak in the ECG is identified with a letter from P to T that correspondence to specific electrical activity of the heart.
The P wave represents the electrical depolarisation of atria.
The QRS complex represents the polarization of the ventricles.
The T wave represents repolarisation.
REGULATION OF CARDIAC ACTIVITY :-
Normal activity of the heart are regulated intrinsically by specialised muscles nodal tissues hence the heart is called myogenic.
DISORDERS OF CIRCULATORY SYSTEM:-
HIGH BLOOD PRESSURES’-
Hypertension is the term for blood pressure that is higher than 120 by 80 in this measurement 120 millimetre Hg millimetres of Mercury pressure is the systolic pressure or pumping pressure and 80 mm mercury is the diastolic or resting pressure.
If repeated checks of blood pressure of an individual is 140 by 90 or 140 over 90 or higher its shows hypertension. High blood pressure leads to heart diseases and also affects vital organs like brain and kidney.
.
CORONARY ARTERY DISEASE (CAD):-
Coronary artery disease often referred to as atherosclerosis , affects the vessel that supply blood to the heart muscle.
It is caused by deposits of calcium , fats , cholesterol and fibrous tissues which makes the lumen of arteries narrower.
ANGINA:-
It is also called eangina pictorist.A symptom of acute chest pain appears when no oxygen is reaching the heart muscle.
Angina can occur in men and women of any age but it is more common among the middle aged and elderly.
It across due to conditions that affect the blood flow.
MCQ CIRCULATORY PATHWAYS class 11 for NEET/KVS PGT BIOLOGY / NVS PGT BIOLOGY EXAM 2023-2024,2025
1. Open circulatory system is present in
(a) arthropods
(b) molluscs
(c) both a and b
(d) mammals
Ans (c) both a and b
2. Closed circulatory system have a
(a) Annelids
(b) chordata
(c) both a and b
(d) hydra
Ans. (c) both a and b
3. Fish have a chambered heart
(a) 2
(b) 3
(c) 4
(d) 1
Ans. (a) 2
4. Amphibian have chamber of heart
(a) 2
(b) 3
(c) 1
(d) 4
Ans.(b) 3
5. Which possess a 4 chambered heart ?
(a) crocodile
(b) birds
(c) mammals
(d) all the above
Ans.(d) all the above
6.Crocodiles have chambered of heart
(a) 3
(b) 2
(c) 4
(d) all the above
Ans.(c) 4
7. Double circulation found in
(a) birds
(b) mammals
(c) both a and b
(d) Sponge
Ans.(c) both a and b
8. Amphibian have 3 chambered heart with
(a) two atria and a single ventricle
(b) two ventricles and a single atria
(c) 3 artria
(d) no artria
Ans.(a) two atria and a ventricle
9. Heart , the ……… derived organ
(a) endodermally
(b) exodermally
(c) mesodermally
(d) all the above
Ans. (c) mesodermally
10. Heart is protected by a double walled membranous bag
(a) pleura
(b) atria
(c) pericardium
(d) epicardium
Ans. (c) pericardium
11. The atrium and the ventricle of the same side are separated by a thick fibrous tissue called the
(a) atrioventricular septum
(b)biscuspid valve
(c) tricuspid valve
(d) all the above
Ans.(a) atrioventricular septum
12. Opening between right atrium and right ventrical is guarded by a valve formed of three muscular flaps or cusps
a) the tricuspid valve
b) the biscuspid valve
c) both a and b
(d) none of the above
Ans . (a) tricuspid valve
13. The guards the opening between the left atrium and the left ventricle
(a) biscuspid valve
(b) mitral valve
(c) both a and b
(d) tricuspid valve
Ans.(c) both a and b
14. The entire heart is made of
(a) cardiac muscle
(b) skeletal muscle
(c) visceral muscles
(d) all the above
Ans. (a) cardiac muscle
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15. A patch of the tissue is present in the right upper corner of the right atrium is called
(a) sino – artrial node
(b) atrio- ventricular node
(c) both a and b
(d) emphysema
Ans.(a) sino- artrial node
16. The pacemaker is
(a) SA node
(b) AV node
(c) both a and b
(d) none
Ans.(a) SA node
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