This quiz works best with JavaScript enabled. Home > Science > Nervous System – Quiz 151 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Nervous System Quiz 151 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Explain the process of action potential in a neuron. A) Action potential is initiated by a depolarization of the neuron's membrane, which causes voltage-gated ion channels to open and allow the influx of sodium ions. B) Action potential is a result of the neuron's membrane becoming hyperpolarized. C) Action potential is caused by the repolarization of the neuron's membrane. D) Action potential is initiated by the influx of potassium ions. Show Answer Correct Answer: A) Action potential is initiated by a depolarization of the neuron's membrane, which causes voltage-gated ion channels to open and allow the influx of sodium ions. 2. The autonomic nervous system consists of A) Single motor neuron bodies originating in the CNS and extending to muscles. B) Chain of two motor neurons, one originating in the CNS and one extending to the effector organ. Show Answer Correct Answer: B) Chain of two motor neurons, one originating in the CNS and one extending to the effector organ. 3. What does oxygen do for our bodies? A) Helps us move. B) Helps us remove waste from our body. C) Helps turn food into energy. D) None of above. Show Answer Correct Answer: C) Helps turn food into energy. 4. Somatic system controls A) Voluntary movement. B) Involuntary movement. Show Answer Correct Answer: A) Voluntary movement. 5. The flow of electricity/impulses/messages from one point to another: A) Voltage. B) Proteins. C) Potassium. D) Current. E) Depolarization. Show Answer Correct Answer: D) Current. 6. It is estimated that around 86 ..... neurons are in our brains, and more than 100 ..... are in our brains at the time of birth. A) Hundred, hundred. B) Million, million. C) Gazillion, gazillion. D) Billion, billion. Show Answer Correct Answer: D) Billion, billion. 7. What is the part of the brain that controls balance, coordination, and unconscious muscle activities A) Cerebrum. B) Cerebellum. C) Brain stem. D) Neurons. Show Answer Correct Answer: B) Cerebellum. 8. When we scoop rice into our mouths and chew it What is the stimulus that makes us chew rice? A) Hunger. B) Saliva. C) Rice in mouth. D) Grilled chicken in a plate. Show Answer Correct Answer: C) Rice in mouth. 9. BONUS:What color is your brain? A) Red. B) Light pink. C) Grey. D) None of above. Show Answer Correct Answer: C) Grey. 10. What term describes the ability of the eye lens to change shape, becoming more convex to focus on near objects and flattening to focus on distant objects? A) Myopia. B) Refraction. C) Astigmatism. D) Accommodation. Show Answer Correct Answer: D) Accommodation. 11. What is the tympanic membrane A) Ossicles. B) Membrane in the cochlea. C) Ear drum. D) Auricle. Show Answer Correct Answer: C) Ear drum. 12. This carries a signal/message away from the cell body: A) Dendrite. B) Conclusion. C) Axon. D) Terminal. Show Answer Correct Answer: C) Axon. 13. Which part of the peripheral nervous system is responsible for involuntary actions? A) Central nervous system. B) Somatic nervous system. C) Autonomic nervous system. D) Sympathetic nervous system. Show Answer Correct Answer: C) Autonomic nervous system. 14. The sympathetic and parasympathetic nervous systems are subdivisions of the: A) Autonomic Nervous System. B) Voluntary Nervous System. C) Central Nervous System. D) Peripheral Nervous System. Show Answer Correct Answer: A) Autonomic Nervous System. 15. Which of the following are paired correctly? A) CNS-brain and spinal cord; PNS-cranial and spinal nerves. B) PNS-brain and spinal cord; CNS-cranial and spinal nerves. C) Autonomic brain and spinal cord; Somatic cranial and spinal nerves. D) Autonomic-cranial and spinal nerves; Somatic-brain and spinal cord. Show Answer Correct Answer: A) CNS-brain and spinal cord; PNS-cranial and spinal nerves. 16. Which major organ does not receive water as a priority during dehydration? A) Kidney. B) Heart. C) Brain. D) Lungs. Show Answer Correct Answer: C) Brain. 17. The PNS nerves are part of either the somatic system or the ..... A) Motor system. B) Sympathetic system. C) Parasympathetic system. D) Autonomic system. Show Answer Correct Answer: D) Autonomic system. 18. Why is the cerebral cortex folded over itself into bumps and grooves? A) To help prevent concussions. B) To make it look really gross. C) To make room for the medulla. D) It increases the surface area. E) They permit neurons to pass electrical signals faster. Show Answer Correct Answer: D) It increases the surface area. 19. As sodium and potassium ions are so small, they can easily pass through the cell membrane to create the action potential. A) True. B) False. Show Answer Correct Answer: B) False. 20. Where are myelinated neurons usually found? A) Peripheral Nervous System (PNS). B) Central Nervous System (CNS). C) Both PNS and CNS. D) None of above. Show Answer Correct Answer: A) Peripheral Nervous System (PNS). ← PreviousNext →Related QuizzesNervous System Quiz 1Nervous System Quiz 2Nervous System Quiz 3Nervous System Quiz 4Nervous System Quiz 5Nervous System Quiz 6Nervous System Quiz 7Nervous System Quiz 8Nervous System Quiz 9Nervous System Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books