1.this part of the brain controls the beating of the heart

a.spinal cord b.cerebrum c.cerebellum d.main stem

2. tiny connections or pathways in the nervous system are called ___

a.blood cells b. neurons c.brain tissues d.tiny cells sites

3. sounds enter the ear as ___

a.vibrations b.loud c.reactions d. all of these

please help me answer this questions it’s due tomorrow 7am….