Consider the following four statements (i) - (iv) and select the correct option.
(i) Fish heart contains only oxygenated blood.
(ii)Closure of A-V valves produces the second heart sound.
(iii) The vascular connection between the digestive tract and kidney is called hepatic portal system.
(iv) Purkinje fibres are nerve fibres present in the heart wall.

i - F, ii - F, iii - T, iv - F

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i - F, ii - F, iii - F, iv - T

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i - T, ii - T, iii - F, iv - T

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i - T, ii - F, iii - T, iv - F

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Solution

The correct option is B i - F, ii - F, iii - F, iv - T
The fish heart contains both oxygenate and deoxygenated blood as it has one atrium and one ventricle.
Closure of A-V valves produces the first heart sound.
The vascular connection between the digestive tract and the liver is called the hepatic portal system.
Purkinje fibres are nerve fibres present in the heart wall.
Thus, the correct answer is 'i - F, ii - F, iii - F, iv - T.'

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Q. The image shows a sectional view of the human heart. What are the functions of the blood vessels numbered from i to iv.

Option	Carries blood from heart to body cells	Carries blood from heart to lungs	Carries blood from lungs to heart	Carries blood from the body cells to heart
A.	i	ii	iii	iv
B.	i	iii	iv	ii
C.	ii	iv	iii	i
D.	iii	i	iv	ii

[0.8 Mark]

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Q. Rearrange the following (

I

I V

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Question 3
Given below are events that lead to pregnancy and development of embryo

(i) Fertilization of egg
(ii) Maturation of egg
(iii) Release of egg
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Which of the following options gives the correct order of sequence in which they occur?

(a) i, ii, iii, iv
(b) ii, i, iii, iv
(c) i, iv, ii, iii
(d) ii, iii, i, iv

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