Human nervous system and it types — task. Science CBSE, Class 10.

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State whether the given statement is true or false and give justification for the same:

1. Sensory cranial nerves control muscle movements in the head and neck.

This statement is

Motor cranial nerves control muscle movements in the head and neck.
Sensory cranial nerves control muscle movements in the hand and chest.

2. Human has the highest brain to body weight ratio among mammals.

This statement is

Humans brain to body ratio have less brain weight accessible for more complicated cognitive tasks.
Humans brain to body ratio have more brain weight accessible for more complicated cognitive tasks.

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