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The number of cranial and spinal nerves in a human being are respectively ______.
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Name the following:
Two parts of the autonomic nervous system
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Write full form of the following abbreviation:
CNS
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Write full form of the following abbreviation:
PNS
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Write full form of the following abbreviation:
ANS
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Distinguish between the following pair:
Sympathetic nervous system and parasympathatic nervous system (location and role)
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While watching a scary movie, mention its effects on the following organs by the autonomous nervous system in the table given below: (one has been done for you as an example).
| Organ | Sympathetic System | Parasympathetic System | |
| e.g. Lungs | Dilates bronchi and bronchioles | Constricts bronchi and bronchioles | |
| (1) | Heart | ______ | ______ |
| (2) | Pupil of the eye | ______ | ______ |
| (3) | Salivary gland | ______ | ______ |
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Two hungry boys (A and B) enter a restaurant and see the menu. Boy B starts salivating but not A. Explain the reason for this difference.
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The pituitary hormone which stimulates contraction of uterus during child birth.
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The diagram shown below is the longitudinal section of a testis of man. Study it carefully and answer the questions that follow
(i) Label the parts numbered 1 to 3 in the diagram.
(ii) In which part of the testis are the sperms produced?
(iii) State the functions of the parts labelled 1 and 3 in the diagram.
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Name the cells that secrete Testosterone
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Give appropriate biological/technical terms for the following:
The kind of twins formed from two fertilized eggs.
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State the exact location of the Proximal convoluted tubule.
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State the main function of the Leydig cells
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State the main function of the Corpus luteum
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Differentiate between Sperm duct and fallopian rube (function)
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the Biological/technical term for The canal through which the testes descend into the scrotum just before the birth of a male baby
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Give scientific reasons: When an ovum gets fertilized, menstrual cycle stops temporarily in a woman.
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Give scientific reasons: Mature erythrocytes in humans lack nucleus and mitochondria
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The diagram given below is that of a developing human foetus. Study the diagram and then answer the questions that follow:
- Label the parts numbered 1 to 3 in the diagram.
- Mention any two functions of the part labelled 2 in the diagram.
- Explain the significance of the part numbered 3 in the diagram.
- Define the term ‘Gestation’. What is the normal gestational period of the developing human embryo?
- Mention the sex chromosomes in a male and female embryo.
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