AP Biology Questions: The Meninges and Central Nervous System

🧠 Quick Study Guide

• 🛡️ Meninges Layers: The meninges are protective membranes surrounding the brain and spinal cord. They consist of three layers: dura mater (outermost), arachnoid mater (middle), and pia mater (innermost).
• 💧 Cerebrospinal Fluid (CSF): CSF is a clear fluid that cushions the brain and spinal cord, providing nutrients and removing waste. It is located in the subarachnoid space.
• 🧠 Central Nervous System (CNS): The CNS comprises the brain and spinal cord. The brain is responsible for higher-level functions, while the spinal cord relays signals between the brain and the peripheral nervous system.
• 📍 Brain Regions: Key regions include the cerebrum (responsible for conscious thought), cerebellum (coordination and balance), brainstem (basic life functions), and diencephalon (thalamus and hypothalamus).
• ⚡ Neurons: The basic functional unit of the nervous system, transmitting electrical and chemical signals.
• 🔗 Synapses: Junctions between neurons where neurotransmitters are released to transmit signals.
• 🖐️ Sensory & Motor Pathways: Sensory pathways transmit information from the body to the brain, while motor pathways transmit commands from the brain to the body.

🧪 Practice Quiz

1. Which of the following is the outermost layer of the meninges?
   1. Arachnoid mater
   2. Pia mater
   3. Dura mater
   4. Subarachnoid space
2. Cerebrospinal fluid (CSF) is found in which of the following spaces?
   1. Epidural space
   2. Subdural space
   3. Subarachnoid space
   4. Dura mater
3. Which part of the brain is primarily responsible for coordination and balance?
   1. Cerebrum
   2. Cerebellum
   3. Brainstem
   4. Thalamus
4. The brainstem consists of which of the following structures?
   1. Cerebrum and cerebellum
   2. Midbrain, pons, and medulla oblongata
   3. Thalamus and hypothalamus
   4. Cerebellum and medulla oblongata
5. What is the primary function of the spinal cord?
   1. Control conscious thought
   2. Coordinate movement
   3. Relay signals between the brain and peripheral nervous system
   4. Regulate hormone production
6. Which of the following cells is the basic functional unit of the nervous system?
   1. Glial cell
   2. Neuron
   3. Epithelial cell
   4. Muscle cell
7. What is the junction between two neurons called?
   1. Axon
   2. Dendrite
   3. Synapse
   4. Myelin sheath