Q1. Which structure is involved in the transmission of impulses at a chemical synapse?A. NeurotransmittersB. Axon hillockC. DendritesD. Nodes of Ranvier
Q2. Which of the following is NOT a characteristic of myelinated nerve fibers?A. Presence of Schwann cellsB. Faster conduction of nerve impulsesC. Continuous conduction of impulsesD. Presence of nodes of Ranvier
Q3. Which of the following statements about the peripheral nervous system (PNS) is correct?A. It consists of the brain and spinal cord.B. It includes cranial and spinal nerves.C. It does not interact with the central nervous system.D. It only controls involuntary functions.
Q4. Which of the following is NOT a function of the medulla oblongata?A. Regulation of respirationB. Control of cardiovascular reflexesC. Coordination of muscle movementsD. Regulation of gastric secretions
Q5. Which type of neuron transmits impulses from the CNS to the effector organs?A. Sensory neuronB. Afferent neuronC. Efferent neuronD. Interneuron
Q6. Which of the following statements about the myelin sheath is correct?A. It speeds up the transmission of nerve impulses.B. It is produced by microglia.C. It slows down nerve conduction.D. It covers all neurons in the body.
Q7. Which part of the brain regulates circadian rhythms in humans?A. Medulla oblongataB. HypothalamusC. ThalamusD. Pons
Q8. Which of the following structures is NOT part of the hindbrain?A. CerebellumB. PonsC. Medulla oblongataD. Hypothalamus
Q9. Which of the following statements about neurotransmitter release is incorrect?A. Calcium ions trigger neurotransmitter release at the synapse.B. Neurotransmitters are released from synaptic vesicles.C. Neurotransmitter release occurs only at chemical synapses.D. Neurotransmitters are directly transmitted through electrical synapses.
Q10. Which of the following statements about the central nervous system is correct?A. It consists of the brain and spinal cord.B. It controls only involuntary actions.C. It does not communicate with the peripheral nervous system.D. It is not protected by any membrane.