Qstnid -Ii-4-null (A) The Diagram Given Below Represents An Organ System In The Human Body. Study The Same And Answer The Questions That Follow : [5] <Img Src = "/Etl/image/esa-icse-x/bio-pyq-sb/y2019/48902750332_9cb0f684c9_o.png" Alt= "" > (A) Identify The System. (A) Label The Parts Marked 2 And 4. Mention The Function Of Part 5. (A) Name The Structural And Functional Units Of The Part Marked 1. (A) What Is The Fluid That Accumulates In Part 3? Which Is The Main Nitrogenous Waste Present In It? (A) Draw A Neat, Labelled Diagram Showing The Longitudinal Section Of Part 1. (B) The Diagram Given Below Represents An Endocrine Gland In The Human Body. Study The Diagram And Answer The Following Questions : [5] <Img Src = "/Etl/image/esa-icse-x/bio-pyq-sb/y2019/48902750347_aece7ef9c8_o.png" Alt= "" > (B) Identify The Endocrine Gland. Where Is It Located? (B) Why Is The Above Gland Referred To As The &Lsquo;master Gland’? (B) Name The Hormone Which In Deficiency Causes Diabetes Insipidus. How Does This Disorder Differ From Diabetes Mellitus ? (B) Explain The Term &Lsquo;hormone’. What Is The Role Of Tropic Hormones In The Human Body? (B) Which Lobe Of The Above Gland Secretes : <Ol><li>oxytocin</li><li>acth</li><li>growth Hormone</li></ol>answer: - Previous Year Paper Year:2019

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ICSE-X-Biology

Previous Year Paper year:2019

with Solutions - page 4

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#4
null (a) The diagram given below represents an organ system in the human body. Study the same and answer the questions that follow :
[5]

(a) Identify the system.
(a) Label the parts marked 2 and 4. Mention the function of part 5.
(a) Name the structural and functional units of the part marked 1.
(a) What is the fluid that accumulates in part 3? Which is the main nitrogenous waste present in it?
(a) Draw a neat, labelled diagram showing the longitudinal section of part 1.
(b) The diagram given below represents an endocrine gland in the human body. Study the diagram and answer the following questions :
[5]

(b) Identify the endocrine gland. Where is it located?
(b) Why is the above gland referred to as the ‘Master gland’?
(b) Name the hormone which in deficiency causes Diabetes Insipidus. How does this disorder differ from Diabetes Mellitus ?
(b) Explain the term ‘Hormone’.

What is the role of Tropic hormones in the human body?
(b) Which lobe of the above gland secretes :

Oxytocin
ACTH
Growth hormone
Answer:
Ans :
(a) (a) Urinary / Excretory system
(a) 2 - Left Ureters

4 - Sphincter muscle

5 - Urine is expelled from urinary bladder through urethra.
(a) Nephron
(a) Urine; main nitrogenous water present in it is urea.
(a)
(b) (b) Pituitary gland.

Location - Hangs from the base of midbrain below hypothalamus of brain.
(b) Because it controls practically all other endocrine gland.
(b) Antidiuretic hormone ; Its deficiency causes diabetes insipidus (hypoglycemia). Insufficient secretion of insulin causes diabetes mellitus (hyperglycemia). It passes sugar in urine.
(b) Hormone is the secretion from some glandular part of the body which is poured directly into blood and which acts on target organs or cells of same individual, bringing about coordination between distant parts of the body.

Tropic hormones stimulate other endocrine gland to produce their specific hormone.
(b)
Posterior lobe
Anterior lobe
Anterior lobe

#4-a
The diagram given below represents an organ system in the human body. Study the same and answer the questions that follow :
[5]

#4-a-i
Identify the system.
Ans : Urinary / Excretory system

#4-a-ii
Label the parts marked 2 and 4. Mention the function of part 5.
Ans : 2 - Left Ureters

4 - Sphincter muscle

5 - Urine is expelled from urinary bladder through urethra.

#4-a-iii
Name the structural and functional units of the part marked 1.
Ans : Nephron

#4-a-iv
What is the fluid that accumulates in part 3? Which is the main nitrogenous waste present in it?
Ans : Urine; main nitrogenous water present in it is urea.

#4-a-v
Draw a neat, labelled diagram showing the longitudinal section of part 1.
Ans :

#4-b
The diagram given below represents an endocrine gland in the human body. Study the diagram and answer the following questions :
[5]

#4-b-i
Identify the endocrine gland. Where is it located?
Ans : Pituitary gland.

Location - Hangs from the base of midbrain below hypothalamus of brain.

#4-b-ii
Why is the above gland referred to as the ‘Master gland’?
Ans : Because it controls practically all other endocrine gland.

#4-b-iii
Name the hormone which in deficiency causes Diabetes Insipidus. How does this disorder differ from Diabetes Mellitus ?
Ans : Antidiuretic hormone ; Its deficiency causes diabetes insipidus (hypoglycemia). Insufficient secretion of insulin causes diabetes mellitus (hyperglycemia). It passes sugar in urine.

#4-b-iv
Explain the term ‘Hormone’.

What is the role of Tropic hormones in the human body?

Ans : Hormone is the secretion from some glandular part of the body which is poured directly into blood and which acts on target organs or cells of same individual, bringing about coordination between distant parts of the body.

Tropic hormones stimulate other endocrine gland to produce their specific hormone.

#4-b-v
Which lobe of the above gland secretes :

Oxytocin
ACTH
Growth hormone
Answer:
Ans :
Posterior lobe
Anterior lobe
Anterior lobe