Neural control and coordination - neuron structure nerve impulse transmission reflex action - Question Bank
1. What is the consequence of a stimulus that is subthreshold for a neuron?
2. The propagation of an action potential along an axon is a form of:
3. Which reflex is primarily involved in maintaining balance and posture?
4. When a postsynaptic neuron receives an inhibitory neurotransmitter, it causes:
5. The process of summation in neurons refers to:
6. Which statement best describes the role of receptors in a reflex arc?
7. The 'trigger zone' for generating an action potential in a neuron is the:
8. Which type of neuron transmits information from the CNS to effectors?
9. A drug that blocks the reuptake of a neurotransmitter would likely:
10. What is the primary function of the axon terminal?
11. The refractory period ensures that:
12. Which of the following is NOT a primary neurotransmitter involved in human neural function?
13. The sodium-potassium pump is crucial for maintaining the concentration gradients of ions across the neuron membrane, requiring:
14. Hyperpolarization occurs when:
15. The depolarization phase of an action potential reaches a peak of about:
16. The resting membrane potential is approximately:
17. Which glial cells form the myelin sheath in the Peripheral Nervous System (PNS)?
18. Which glial cells form the myelin sheath in the Central Nervous System (CNS)?
19. The process by which neurotransmitters are removed from the synaptic cleft is important for:
20. Which part of the neuron contains the nucleus and major organelles?
21. The role of the interneuron in a polysynaptic reflex arc is to:
22. Withdrawal reflexes, like pulling your hand away from a hot object, are examples of:
23. In the knee-jerk reflex, the sensory neuron directly synapses with the:
24. The knee-jerk reflex (patellar reflex) is an example of a:
25. A simple reflex arc typically involves how many neurons?
26. The effector in a reflex arc is responsible for:
27. The motor neuron transmits the impulse from the CNS to the:
28. An interneuron, also known as a relay neuron, is typically found in the:
29. The sensory neuron transmits the impulse from the receptor to the:
30. Which component of a reflex arc detects the stimulus?
31. The pathway followed by a nerve impulse during a reflex action is called a:
32. What is a reflex action?
33. The space between the presynaptic terminal and the postsynaptic membrane is called the:
34. Which of the following is a common inhibitory neurotransmitter?
35. Which of the following is a common excitatory neurotransmitter?
36. Neurotransmitters are released from the:
37. Saltatory conduction, which speeds up nerve impulse transmission, occurs in:
38. The 'all-or-none' principle of nerve impulse transmission means that:
39. What happens during repolarization of a neuron?
40. The rapid influx of sodium ions into the neuron causes:
41. During the generation of an action potential, which ion channels open first, leading to depolarization?
42. Which ion is primarily responsible for the resting membrane potential of a neuron?
43. The transmission of a nerve impulse across a synapse is typically mediated by:
44. What is the junction between two neurons called?
45. The cell body of a neuron is also called the:
46. Gaps in the myelin sheath along an axon are known as:
47. What is the insulating layer around the axon of many neurons?
48. The long projection of a neuron that conducts electrical impulses away from the cell body is called the:
49. Which part of a neuron receives signals from other neurons?
50. What is the basic functional unit of the nervous system?