(D) The heart sounds are $Lubb$ and $Dub$.$Lubb$ is the first heart sound,which is low-pitched and of longer duration,caused by the closure of the atr

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Both Assertion and Reason are incorrect.

(D) The heart sounds are $Lubb$ and $Dub$.$Lubb$ is the first heart sound,which is low-pitched and of longer duration,caused by the closure of the atrioventricular $(AV)$ valves.$Dub$ is the second heart sound,which is high-pitched and of shorter duration,caused by the closure of the semilunar valves.Therefore,the Assertion is incorrect because 'Dub' is short and sharp,and the Reason is incorrect because 'Dub' is caused by semilunar valves,not $AV$ valves.

Class 11 Biology Body Fluids and Circulations Mix Examples- Body Fluids and Circulations

Medium

$A$: 'Dub' is a long and sharp sound.
$R$: It is caused by the closing of atrioventricular valves.

A
Assertion and Reason both are correct and Reason is the correct explanation of Assertion.
B
Assertion and Reason both are correct but Reason is not the correct explanation of Assertion.
C
Assertion is correct,but Reason is incorrect.
D
Both Assertion and Reason are incorrect.

Explore More

Browse All

Question Bank

All Subjects

Class 11 Questions

Class 11

Biology Questions

Chapter

Body Fluids and Circulations

Subtopic

Mix Examples- Body Fluids and Circulations

The organ that acts as a filter for blood is:

Easy

View Solution

Match the following:
Types of leucocytes | Function
$A.$ Neutrophils | $1.$ Heparin and histamine secretion
$B.$ Basophils | $2.$ Antibodies formation
$C.$ Acidophils | $3.$ Scavenger
$D.$ Monocytes | $4.$ Phagocytes
$E.$ Lymphocytes | $5.$ Antiallergic and healing of wounds
The correct pairing sequence is:

Medium

View Solution

Which one of the following is a matching pair of a certain body feature and its value/count in a normal human adult?

MediumAIIMS 2008

View Solution

Match column $I$ with column $II$:
Column $I$ Column $II$
$(a)$ Eosinophils $(i)$ Coagulation
$(b)$ $RBC$ $(ii)$ Universal Recipient
$(c)$ $AB$ Group $(iii)$ Resist Infections
$(d)$ Platelets $(iv)$ Contraction of Heart
$(e)$ Systole $(v)$ Gas transport

Easy

View Solution

What is the function of the human spleen?

Medium

View Solution

Vedclass Products

For Students

Vedclass Test Series

Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.

Start Free Trial

For Teachers

Exam Paper Generator

Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.

Try Free

For Institutes

Online Exam Module

Live online exams with unlimited students, 360° analytics & white-label branding.

See Demo

Column $I$	Column $II$
$(a)$ Eosinophils	$(i)$ Coagulation
$(b)$ $RBC$	$(ii)$ Universal Recipient
$(c)$ $AB$ Group	$(iii)$ Resist Infections
$(d)$ Platelets	$(iv)$ Contraction of Heart
$(e)$ Systole	$(v)$ Gas transport

$A$: 'Dub' is a long and sharp sound.$R$: It is caused by the closing of atrioventricular valves.

Similar Questions

The organ that acts as a filter for blood is:

Which one of the following is a matching pair of a certain body feature and its value/count in a normal human adult?

Match column $I$ with column $II$:Column $I$Column $II$$(a)$ Eosinophils$(i)$ Coagulation$(b)$ $RBC$$(ii)$ Universal Recipient$(c)$ $AB$ Group$(iii)$ Resist Infections$(d)$ Platelets$(iv)$ Contraction of Heart$(e)$ Systole$(v)$ Gas transport

What is the function of the human spleen?

Vedclass Test Series

Exam Paper Generator

Online Exam Module

$A$: 'Dub' is a long and sharp sound.
$R$: It is caused by the closing of atrioventricular valves.

Match column $I$ with column $II$:
Column $I$ Column $II$
$(a)$ Eosinophils $(i)$ Coagulation
$(b)$ $RBC$ $(ii)$ Universal Recipient
$(c)$ $AB$ Group $(iii)$ Resist Infections
$(d)$ Platelets $(iv)$ Contraction of Heart
$(e)$ Systole $(v)$ Gas transport