This quiz works best with JavaScript enabled. Home > Science > Biology > Nervous System – Quiz 466 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Nervous System Quiz 466 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. The nervous system gathers info from inside and outside the body. A) True. B) False. Show Answer Correct Answer: A) True. 2. Too much of this neurotransmitter can cause severe muscle spasms and even death A) Serotonin. B) Endorphins. C) Acetylcholine. D) GABA. Show Answer Correct Answer: C) Acetylcholine. 3. Which structure in humans transmit electrical messages? A) Veins. B) Lymphocytes. C) Neurons. D) Nephrons. Show Answer Correct Answer: C) Neurons. 4. The threshold of the stimulus A) If a stimulus is below its minimum threshold level nothing will happen. B) This state exists when a neuron is not carrying an impulse but prepared. C) A neuron cant conduct an impulse. a neuron will always conduct an impulse totally or not at all. D) None of above. Show Answer Correct Answer: A) If a stimulus is below its minimum threshold level nothing will happen. 5. What is the membrane that protects the brain and spinal cord? A) Meninges. B) Cerebrospinal fluid. C) Neuron. D) Myelin sheath. Show Answer Correct Answer: A) Meninges. 6. ..... is the liquid present inside our eye. A) Aqueous humor. B) Iris. C) Pupil. D) Egg. Show Answer Correct Answer: A) Aqueous humor. 7. What do motor/efferent neurons do? A) Carry messages from the brain and spinal cord to muscles and glands. B) Carry impulses from the skin and sends to the spinal cord and brain. C) Carry impulses from sensory neurons to motor neurons. D) Store messages. Show Answer Correct Answer: A) Carry messages from the brain and spinal cord to muscles and glands. 8. At extreme temperatures, many enzymes..... A) Speed up reactions. B) Slow down reactions. C) Stop working properly. D) All of the above. Show Answer Correct Answer: C) Stop working properly. 9. How do the pupils in our eyes adjust to changes in light? A) By dilating (becoming larger) in dim light and constricting (becoming smaller) in bright light to regulate the amount of light entering the eye. B) By secreting tears to protect the eye from excessive light exposure. C) By changing the curvature of the cornea to focus incoming light onto the retina. D) By activating photoreceptor cells in the retina to detect changes in light intensity. Show Answer Correct Answer: A) By dilating (becoming larger) in dim light and constricting (becoming smaller) in bright light to regulate the amount of light entering the eye. 10. The type of contraction in which the muscle fibers shorten is called A) Concentric isotonic. B) Eccentric isotonic. C) *isometric. D) *treppe. Show Answer Correct Answer: A) Concentric isotonic. 11. The long structure in the neuron that carries an electrical impulse to the terminals. A) Dendrite. B) Neurotransmitter. C) Axon. D) Stimulus. Show Answer Correct Answer: C) Axon. 12. What is the myelin sheath's important function? A) Insulating the axon fibers. B) Caring impulses from the CNS to muscles and glands. C) Controlling the smooth muscles of he internal organs. D) Stimulating the skeletal muscles. Show Answer Correct Answer: A) Insulating the axon fibers. 13. Middle layer; very thin, cob-web like A) Arachnoid. B) Pia mater. C) Dura Mater. D) None of above. Show Answer Correct Answer: A) Arachnoid. 14. What do the Pineal glands do? A) Make enzymes. B) Stores memories. C) Makes Melatonin. D) Kills viruses. Show Answer Correct Answer: C) Makes Melatonin. 15. The 4 (four) flavors that you can taste are sweet, sour, bitter and ..... A) Salty. B) Fresh. Show Answer Correct Answer: A) Salty. 16. Imagine Luna, Charlotte, and Aiden are on a space mission. They encounter an alien who asks them, 'Which system is your brain a part of?' What should they answer? A) Peripheral Nervous System. B) Central Nervous System. Show Answer Correct Answer: B) Central Nervous System. 17. What is a difference between hormones and nerves? A) Hormones have a slow response but low duration (doesn't last long). B) Nerves have a quick response and a low duration of affect (doesn't last long). C) Only hormone release is controlled by the hypothalamus. D) The hypothalamus controls autonomic (involuntary) responses. Show Answer Correct Answer: B) Nerves have a quick response and a low duration of affect (doesn't last long). 18. Which is the largest part in our brain? A) Cerebrum. B) Cerebellum. C) Neurons. D) Medulla. Show Answer Correct Answer: B) Cerebellum. 19. Reflex arcs are a type of neural pathway that: A) Does NOT involve the brain. B) DOES involve the brain. Show Answer Correct Answer: A) Does NOT involve the brain. 20. 37 Which of the following is not a function of the sympathetic nervous system? A) Increases heart rate glucose from the liver. B) Dilates blood vessels in skeletal muscles. C) Stimulates digestion. D) Releases glucose from the liver. Show Answer Correct Answer: C) Stimulates digestion. ← PreviousNext →Related QuizzesScience 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books