5 Questions
What is the primary composition of the central nervous system (CNS)?
Brain and spinal cord
Where is the brain housed in vertebrates?
Cranial cavity within the skull
What provides a barrier to chemicals dissolved in the blood, protecting the brain from most neurotoxins commonly found in food?
Meninges
What replaces the body fluid found outside the cells of all bilateral animals in vertebrates?
Cerebral spinal fluid
Which animals have a true brain according to the text?
Arthropods, cephalopods, and vertebrates
Study Notes
Central Nervous System (CNS)
- The primary composition of the CNS consists of the brain and spinal cord.
Brain Anatomy
- In vertebrates, the brain is housed in the skull.
Blood-Brain Barrier
- The blood-brain barrier provides a protective shield, preventing most neurotoxins commonly found in food from entering the brain.
Body Fluids
- In vertebrates, cerebrospinal fluid replaces the body fluid found outside the cells of all bilateral animals.
Evolution of the Brain
- Only vertebrates have a true brain, according to the text.
Test your knowledge of the central nervous system with this quiz. Explore the brain and spinal cord, their functions, and their integration with the body's activities. See how much you know about this vital part of the nervous system.
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