BioEd Online
Bio Ed Online: Our Sense of Hearing
What causes sound? How do our ears detect sound? How do our brains recognize sound? In this lesson learners investigate hearing and discover that sensory receptors in the ears collect sound information and transmit it to the brain, and...
BioEd Online
Bio Ed Online: Neurotransmitters Contain Chemicals
Nervous system signals are transmitted electrically along individual neurons, but neurons are separated from each other by a tiny gap. Chemical messengers called neurotransmitters cross the gap between neurons. Neurotransmitters fit into...