The Nervous System

Mr. Anderson's video on the Animal Nervous System covers the brain's hemispheres, neuron functions, and action potentials. It explains how neurons communicate through synapses using neurotransmitters like GABA. The video also explores the concept of split brain and how different brain parts handle various functions. The importance of neuron connections in forming memories is highlighted, emphasizing the nervous system's complexity and significance.

What is the primary function of the Corpus callosum in the brain?

• To regulate vision

• To control speech

• To connect the two hemispheres

• To separate the two hemispheres

What happens when the Corpus callosum is severed?

• Speech is impaired

• The brain stops functioning

• Vision is lost

• The two hemispheres can no longer communicate

What is the role of neurotransmitters in neuron communication?

• They generate electrical signals

• They store energy

• They insulate the axon

• They transmit chemical messages across synapses

Which part of the neuron receives incoming signals?

• Axon

• Myelin sheath

• Dendrites

• Soma

What is the function of the myelin sheath?

• To speed up the transmission of nerve impulses

• To store neurotransmitters

• To protect the neuron from damage

• To slow down nerve impulses

What triggers the opening of sodium channels in a neuron?

• The presence of calcium ions

• A change in voltage

• The release of neurotransmitters

• The movement of potassium ions

What is the resting voltage of a typical neuron?

• -55 millivolts

• +70 millivolts

• -70 millivolts

• 0 millivolts

What role do calcium ions play in synaptic transmission?

• They inhibit neuron firing

• They insulate the axon

• They release neurotransmitters

• They generate action potentials

Which neurotransmitter is known for its inhibitory effects?

• GABA

• Dopamine

• Acetylcholine

• Serotonin

How do excitatory signals affect a neuron?

• They decrease the likelihood of firing

• They increase the likelihood of firing

• They inhibit neurotransmitter release

• They have no effect