Q20 of 54 Page 51

A person was riding a two-wheeler without wearing a helmet. He met with an accident and sustained a head injury. He was dead before he was shifted to the hospital and it was found that his death was due to breathlessness and heart failure. Which part of his brain might have been damaged? Justify your answer.

The damage had taken place in a Hind part of the brain. And, in hind part, this damage had taken place mainly in the Medulla oblongata part.

Justification: As it is given in question that person had died due to breathlessness and heart failure and medulla oblongata is the part of the hind brain which controls and coordinates both these processes. So, might be damage had taken place in medulla oblongata part of the hind brain.


More from this chapter

All 54 →
18

Here are some statements about meiosis. State whether each of them is true or false:

i) It takes place in somatic cells.


ii) Meiosis is also called reduction division.


iii) The pairing of homologous chromosomes is called crossing over.


iv) Meiosis leads to variations which form the raw material for evolution.

 19

Match the following:

 21

Match the following:

 22

Observe the following diagrams that depict the transmission of nerve impulses through two pathways from body parts to CNS:


If all the nerves at both the places are similar in thickness and structure, through which pathway will the transmission of an impulse (of the same threshold) be faster and why?