Grade 7 nervous system quiz with answers and explanations.

🧠 Quick Study Guide

• 🧠 The nervous system is your body's control center.
• 📡 Neurons (nerve cells) transmit electrical and chemical signals.
• 🚦 The central nervous system (CNS) includes the brain and spinal cord.
• 💪 The peripheral nervous system (PNS) connects the CNS to the rest of the body.
• 🖐️ Sensory neurons detect stimuli (like touch or light).
• ⚙️ Motor neurons carry signals to muscles and glands.
• ⚡️ Signals travel along neurons through synapses.

🧪 Practice Quiz

1. Which part of the nervous system includes the brain and spinal cord?
   1. Peripheral Nervous System
   2. Central Nervous System
   3. Autonomic Nervous System
   4. Somatic Nervous System


2. What is the main function of sensory neurons?
   1. To carry signals to muscles
   2. To detect stimuli
   3. To control involuntary actions
   4. To transmit signals within the brain


3. Which type of neuron carries signals from the brain to the muscles?
   1. Sensory Neuron
   2. Interneuron
   3. Motor Neuron
   4. Association Neuron


4. What is the gap between two neurons called?
   1. Axon
   2. Dendrite
   3. Synapse
   4. Myelin Sheath


5. Which of the following is NOT a part of the central nervous system?
   1. Brain
   2. Spinal Cord
   3. Nerves in the arm
   4. Cerebellum


6. What is the role of the myelin sheath?
   1. To slow down nerve impulses
   2. To protect the neuron
   3. To speed up nerve impulses
   4. To transmit signals to other neurons


7. Which division of the nervous system controls involuntary actions like heart rate and digestion?
   1. Somatic Nervous System
   2. Central Nervous System
   3. Autonomic Nervous System
   4. Peripheral Nervous System