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IGNOU BZYCT-133 Important Question & Exam Note in English Medium Download
IGNOU BZYCT-133 Important Question & Exam Notes ,Top 20 Question of BZYCT-133
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Which are the four successive layers present in the integument of mammals? |
List the primary divisions of the nervous system and their subdivisions. |
List the cranial nerves of special senses and the nerves that innervate the eye muscles. |
Describe specialised sensory organs of vertebrates and relate their role to their habitat. |
Explain the role of fate maps and patterns of development |
How would you define a ligand in cell-to cell signalling? |
What is the difference between juxtacrine and paracrine signalling? |
How is EMT used in the embryo and in the adult? |
Describe the process of internalization of mesoderm in frog. What are the end results of the gastrulation process? |
Discuss the process of development of extra embryonic membranes in chick. |
How do genetic and environmental defects cause problems in development? |
Give five features that you can use to distinguish between the skulls of frog and rabbit. |
Describe the specializations found in ruminant stomachs. |
What are the peculiar features of respiratory system of agnathans? |
Give short answers to the following: i) What is the major modification that occurs in reptilian aortic arches? ii) What is the role of ductus arteriosus in bird’s circulatory system? iii) How does right subclavian develop in mammals? iv) Write one difference between somatic and visceral arteries. v) What are precaval veins? |
Write short notes on: i) Kidney blood circulation ii) Types of mammalian uteri |
How do bats prevent getting deaf from their high frequency calls? How do they get information about the immediate environment? |
Briefly write the functions of the following hormones secreted in mammals. a) Adrenocoricotropic hormone b) Parathormone c) Aldosterone d) Testosterone e) Progesterone |
List at least three stages in gene expression that can be regulated to result in differentiated cell types? Explain any one of them with the help of an example. |
How would you define a ligand in cell-to cell signalling? |
What is the difference between juxtacrine and paracrine signalling. |
How is EMT used in the embryo and in the adult? |
What is a signal transduction pathway? Write out its steps in the order they would occur in a target cell. |
Indicate the following changes that occur during metamorphosis in amphibians either as progressive or regressive or remodeling: a) The development of middle ear in connection with the pharyngeal pouch. b) The change in the shape of the mouth and the shortening and reduction of the cloacal tube. c) Disappearance of lateral line organs of skin and reduction of blood vessels. d) The differentiation of brain. e) The changes in the portal system and the changes in the vascular system to supply blood to the lungs. |
Name the organs derived from: a) Dorsal mesoderm b) Lateral plate mesoderm |
What is the function of amniotic fluid? How are substances exchanged between the embryonic and maternal blood? |
Which common maternal diseases can lead to flaws in development? Explain. |

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