Structures of the Brain

How much does the human brain weigh?

• 3.3 pounds or 1.5 kilograms

• 2 pounds or 0.9 kilograms
• 3 pounds or 1.4 kilograms
• 5 pounds or 2.3 kilograms

Which animal can process things better than humans?

• Elephants

• Cats
• Dolphins

• Fish

What do motor neurons do?

• Filter blood in the kidneys
• Produce insulin
• Regulate heart rate
• Take away messages from your brain

What do sensory neurons do?

• Send messages to your brain

• Transmit signals from the heart to the lungs
• Transmit signals from sensory organs to the brain and spinal cord
• Transmit signals from the brain to sensory organs

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The small cordlike structure in your brain is called your ————————————————.

• intestine cord
• brain stem

• muscle cord
• spinal cord

What happens when you have a lot of folds on your brain?

• Decreased surface area for fewer neurons and connections
• No change in surface area or neuron connections
• You’re able to process things much better

• Increased risk of brain damage and cognitive decline

Your brain’s spinal cord is made up of the__________________________.

• muscles and tendons
• blood vessels and capillaries
• nerve cells and bundles of nerve fibers
• central nervous system

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