Breasts Structure and Function

Q. In which of the following order milk secreted from the mammary glands reaches nipples.

1. Mammary ducts → mammary ampulla → mammary tubules → lactiferous duct
2. Mammary ampulla → mammary duct→ lactiferous duct → mammary tubules
3. Lactiferous duct → mammary duct → mammary ampulla → mammary tubules
4. Mammary tubules → mammary ducts → mammary ampulla → lactiferous duct

Q. Identify the type of inheritance pattern given in the following human pedigree.

1. X-linked dominant
2. Autosomal recessive
3. Autosomal dominant
4. X-linked recessive

Q.

What is colostrum?

Q. Proboscis gland is a/an

1. Endocrine organ
2. Excretory organ
3. Feeding organ
4. Reproductive organ

Q. Which one is the incorrect match?

1. 
   congsanguineous mating
2. 
   male
3. 
   unspecified sex
4. unaffected individuals

Q.

Vitrllogenesis occur during the formation of

A)oogonial cell in graffian follicle

B. Ootid in fallopian tube

C. Sec oocyte in fallopian tube

D. Primary oocyte in graffian follicle.

Q. Identify the labelled parts 1 - 4 in the given figure of the blastocyst within the uterus.

1. 1- Blastocyst, 2. Inner cell mass, 3. Corona Radiata, 4.Trophoblast
   
2. 1- Blastomere, 2.Trophoblast, 3. Corona Radiata, 4.Inner cell mass
   
3. 1- Blastomere, 2. Trophoblast, 3. Zona pellucida, 4.Inner cell mass
   
4. 1- Blastocoel, 2.Trophoblast, 3. Zona pellucida, 4.Inner cell mass
   

Q. Chalaza representing the:

1. 
   Tip of the ovule
2. 
   Base of the ovule
3. 
   Both (1) & (2)
4. Stalk of the ovule

Q. In breast of human female, milk is sucked out through:

1. Mammary tubule
2. Mammary duct
3. Mammary ampulla
4. Lactiferous duct

Q. After birth, colostrum is released from the mammary gland which is rich in

1. proteins, fat and low in antibodies
2. proteins, antibodies and low in fat
3. proteins and low in fats
4. fat and low in proteins

Q.

A sequential expression of a set of human genes occurs when a steroid molecule binds to the

1. tRNA

2. mRNA

3. DNA sequence

4. Ribosome

Q.

What does a girl inherit from her father?

Q.

Assertion: When water has to be conserved in the body, ADH is secreted from the posterior pituitary. ​

Reason: ADH renders the walls of DCT, collecting duct and tubule impermeable to water.​

Q. What is capacitation with reference to mammalian sperm

Q.

Why is colostrum so important for babies?

Q.

Recessive characters are expressed in the subsequent generation only:

1. On any autosome

2. On both the chromosome of female

3. When they are present on X chromosome of male

4. When they are present on X chromosome of female

Q. Pedigree analysis is very important in human beings because:

1. It helps genetic counselling to avoid disorders
2. It shows the origin of traits
3. It shows the flow of traits in family
4. All of the above

Q. Distinguish between Polyp and Medusa.​

Q. Corpus callosum connects

1. optic lobes
2. corpora quadrigemina
3. lobes of cerebellum
4. cerebral hemispheres

Q. The frequency of X-linked recessive trait in a population with XY sex-determination system is 0.3. What will be the frequency of affected males?

1. 0.09
2. 0.3
3. 0.7
4. 0.42

Q.

Identify the labelled parts in the given cross-section of female breast.

1. (i) Lobe, (ii) Lobule, (iii) Acini , (iv) Lactiferous duct

2. (i) Lactiferous duct, (ii) Lobule, (iii) Lobe, (iv) Acini

3. (i) Lactiferous duct, (ii) Acini, (iii) Lobe, (iv) Lobule

4. (i) Lobule, (ii) Acini, (iii)Lobe, (iv) Lactiferous duct

Q. Acromegaly is due to

1. Hypersecretion of GH
2. Hyposecretion of GH
3. Hypersecretion of ACTH
4. Hyposecretion of ACTH

Q. Identify the labelled parts 1 - 4 in the given figure of the blastocyst within the uterus.

1. 1- Blastocyst, 2. Inner cell mass, 3. Corona Radiata, 4.Trophoblast
   
2. 1- Blastomere, 2.Trophoblast, 3. Corona Radiata, 4.Inner cell mass
   
3. 1- Blastomere, 2. Trophoblast, 3. Zona pellucida, 4.Inner cell mass
   
4. 1- Blastocoel, 2.Trophoblast, 3. Zona pellucida, 4.Inner cell mass
   

Q.

Differentiate between the following on the basis of what is mentioned within brackets.

Corpus callosum and corpus luteum (Function)

Q. Assertion :The female external genitalia includes mons pubis, labia majora and labia minora. Reason: The glandular tissue of each breast is divided into 5-10 mammary lobes.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect

Q. Pedigree analysis is very important in human beings because:

1. It helps genetic counselling to avoid disorders
2. It shows the origin of traits
3. It shows the flow of traits in family
4. All of the above

Q. Differentiate between.
Holocrine and apocrine glands

Q. Differentiate between the following pairs on the basis of what is mentioned within brackets:
Corpus callosum and Corpus luteum (Function).

Q. Very short answer type.
Give one reason for a statutory ban on amniocentesis

Q. Nature of mammary gland is

1. Apocrine
2. Merocrine
3. Holocrine
4. None of the above