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Subjects
Science State Board
Class 10
Transportation in plants & Circulation in animals
Circulation in animals

20. Closed, open type circulation, blood vessels and heartbeat

Exercise condition:

6 m.

Examine the statements below and choose the correct answer:

1.

Assertion (A):	Mammalian heart is called myogenic heart.
Reasoning (R):	Heartbeat is regulated by a specialized muscle bundle (pacemaker) in mammals.

A is false but R is true
Both A and R are true and R is the correct explanation of A
A is true but R is false
Both A and R are true but R is NOT the correct explanation of A
Both A and R are false

2.

Assertion (A):	The sound of heart beats, heart valve functions can be detected by a stethoscope.
Reasoning (R):	Stethoscopes are high precision instruments.

Both A and R are false
Both A and R are true but R is NOT the correct explanation of A
Both A and R are true and R is the correct explanation of A
A is true but R is false
A is false but R is true

3.

Assertion (A):	Expansion of artery when the blood is forced into it is called pulse.
Reasoning (R):	Pulse is also called as arterial pulse.

Both A and R are true but R is NOT the correct explanation of A
Both A and R are false
A is false but R is true
A is true but R is false
Both A and R are true and R is the correct explanation of A

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