The layer of cells which covers the cerebral hemispheres is called .......

Which of the following statements are correct about the midbrain?
$(I)$. Located between the thalamus/hypothalamus of the forebrain and pons of the hindbrain
$(II)$. $A$ canal named cerebral aqueduct passes through it
$(III)$. The dorsal part consists of $4$ lobes called corpora quadrigemina
Choose the correct option

Which part of the brain controls involuntary actions in the body?

Which part of the brain is directly concerned with the control of the heart?

The choroid plexus functions to produce:

The cerebral cortex is referred to as the grey matter due to its greyish appearance. The ........... are concentrated here giving the colour.