1. Coloured part of eye that lacks blood vessels 
a. Cornea b. Sclerotic layer 
c. Optic nerve 
2. Structure that carries electrical impulse from dendrite to nerve endings of neuron 
3. Function of cerebral cortex 
4. Appropriate term for muscular extention pf camda epididymis 
5. Q5(a) in the picture

5. (a)  The diagram below represent a microscopic view of human egg ( or egg cell)
(i) Name the parts labelled as A, B, C and D respectively.
(ii) Identify that which part of the egg cell is ruptured by the enzyme released by the vacrosome of sperm. 
(iii) Which part of the egg fuse with the sperm to form a zygote? 
(iv) Draw a diagram of the process of fusion of egg and sperm. 

Dear student,        
Please find below the solution to the asked query                                                                

1. Cornea is the part of the eye that lacks blood vessels. Hence, option (a) is correct.

2. Axon carries the electrical impulse from dendrites to nerve endings of neuron.

3. Cerebral Cortex is the outer layer of cells covering the cerebral hemispheres of brain. It is also called ‘grey matter” due to its greyish appearance, imparted by the high concentration of neuron cell bodies.

The four lobes of the cerebral cortex are frontal lobe, parietal lobe, temporal lobe and occipital lobe. Their functions are as follows:

  • Frontal lobe − It is responsible for cognitive functions such as attention, thinking, memory, reasoning and learning. It also inhibits the autonomic and emotional responses.

  • Parietal lobe − It is mainly concerned with cutaneous sensations and their coordination with visual and auditory sensations.

  • Temporal lobe − It processes the auditory information. It also helps in understanding of speech and written language and memorising symbolic sounds and words.

  • Occipital lobe − It interprets visual impulses, memorises visual stimuli and helps in colour visual orientation.

​Please post other questions in a separate thread. 

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