Q1. What structures make up the central nervous system?

Background

Topic: Organization of the Nervous System

This question tests your knowledge of the main anatomical divisions of the nervous system.

Key Terms:

• Central Nervous System (CNS): The part of the nervous system that integrates information and coordinates activity.

• Brain and Spinal Cord: The two primary structures of the CNS.

Step-by-Step Guidance

1. Recall the two main divisions of the nervous system: central and peripheral.

2. Think about which structures are protected by the skull and vertebral column.

3. Identify the organs responsible for processing and relaying information.

Try solving on your own before revealing the answer!

Q2. What is the period called when an excitable cell cannot generate another action potential?

Background

Topic: Action Potentials

This question tests your understanding of the refractory periods during neuronal signaling.

Key Terms:

• Refractory Period: The time during which a neuron is unable to fire another action potential.

• Absolute vs. Relative Refractory Period: Two phases of reduced excitability.

Step-by-Step Guidance

1. Recall what happens to voltage-gated sodium channels after an action potential.

2. Consider the time when these channels are inactivated and cannot reopen.

3. Identify the term for this period when no new action potential can be generated.

Try solving on your own before revealing the answer!

Q3. What type of neurons carry nerve impulses from receptors toward the central nervous system?

Background

Topic: Functional Classification of Neurons

This question tests your knowledge of the direction of information flow in neurons.

Key Terms:

• Afferent Neurons: Carry information toward the CNS.

• Sensory Neurons: Another term for afferent neurons.

Step-by-Step Guidance

1. Recall the difference between afferent and efferent neurons.

2. Think about the direction of impulse transmission from sensory receptors.

3. Identify the term for neurons that transmit signals toward the CNS.

Try solving on your own before revealing the answer!

Q4. Which neuroglia produce the myelin sheath in the CNS?

Background

Topic: Neuroglia and Myelination

This question tests your knowledge of the types of glial cells and their functions.

Key Terms:

• Oligodendrocytes: Glial cells that myelinate CNS axons.

• Myelin Sheath: Insulating layer around axons.

Step-by-Step Guidance

1. Recall the types of neuroglia in the CNS and PNS.

2. Identify which cell is responsible for myelination in the CNS.

3. Compare with Schwann cells, which myelinate in the PNS.

Try solving on your own before revealing the answer!

Q5. Where is the nucleus of the neuron located?

Background

Topic: Neuron Structure

This question tests your knowledge of the anatomy of a neuron.

Key Terms:

• Cell Body (Soma): The main part of the neuron containing the nucleus.

• Nucleus: Organelle containing genetic material.

Step-by-Step Guidance

1. Recall the main structural parts of a neuron: dendrites, axon, and cell body.

2. Identify which part contains most organelles, including the nucleus.

3. Think about the function of the cell body in maintaining cell health.

Try solving on your own before revealing the answer!

Q6. What are clusters of rough endoplasmic reticulum called in neurons?

Background

Topic: Neuron Organelles

This question tests your knowledge of specialized structures within neurons.

Key Terms:

• Nissl Bodies: Aggregates of rough ER in neurons.

• Protein Synthesis: Function of rough ER.

Step-by-Step Guidance

1. Recall the role of rough ER in cells.

2. Think about the special name for these clusters in neurons.

3. Consider their function in protein synthesis for neurotransmitters.

Try solving on your own before revealing the answer!

Q7. Where do nerve impulses arise in a neuron?

Background

Topic: Neuron Function

This question tests your knowledge of the initiation site for action potentials.

Key Terms:

• Trigger Zone: Area where action potentials are initiated.

• Axon Hillock: Specific location in many neurons.

Step-by-Step Guidance

1. Recall the parts of a neuron: dendrites, cell body, axon.

2. Identify the region where the axon joins the cell body.

3. Think about where the threshold for action potential is reached.

Try solving on your own before revealing the answer!

Q8. What do synaptic vesicles store?

Background

Topic: Synaptic Transmission

This question tests your knowledge of the contents of synaptic vesicles.

Key Terms:

• Neurotransmitters: Chemicals that transmit signals across synapses.

• Synaptic Vesicles: Membrane-bound structures in axon terminals.

Step-by-Step Guidance

1. Recall the function of synaptic vesicles in the axon terminal.

2. Think about what is released into the synaptic cleft during transmission.

3. Identify the chemical messengers involved in neuron communication.

Try solving on your own before revealing the answer!

Q9. What are the effectors for the somatic nervous system?

Background

Topic: Somatic vs. Autonomic Nervous System

This question tests your knowledge of the targets of somatic motor neurons.

Key Terms:

• Effectors: Structures that respond to neural signals.

• Somatic Nervous System: Controls voluntary movements.

Step-by-Step Guidance

1. Recall the difference between somatic and autonomic effectors.

2. Think about which tissues are under voluntary control.

3. Identify the main effector organs for somatic motor neurons.

Try solving on your own before revealing the answer!

Q10. What do nerve cell bodies in the PNS generally form?

Background

Topic: Peripheral Nervous System Anatomy

This question tests your knowledge of the organization of nerve cell bodies outside the CNS.

Key Terms:

• Ganglia: Clusters of nerve cell bodies in the PNS.

• Nucleus: Cluster of cell bodies in the CNS.

Step-by-Step Guidance

1. Recall the terminology for clusters of cell bodies in the CNS vs. PNS.

2. Identify the term used for clusters in the PNS.

3. Think about examples such as dorsal root ganglia.

Try solving on your own before revealing the answer!

Q11. What is a neuron with one dendrite and one axon classified as?

Background

Topic: Structural Classification of Neurons

This question tests your knowledge of neuron types based on their processes.

Key Terms:

• Bipolar Neuron: One dendrite, one axon.

• Multipolar and Unipolar: Other neuron types.

Step-by-Step Guidance

1. Recall the structural classification of neurons: unipolar, bipolar, multipolar.

2. Identify which type has exactly one dendrite and one axon.

3. Think about where these neurons are commonly found (e.g., retina).

Try solving on your own before revealing the answer!

Q12. What is an ion channel that opens in response to changes in membrane potential called?

Background

Topic: Ion Channels

This question tests your knowledge of the types of ion channels in neurons.

Key Terms:

• Voltage-Gated Channel: Opens in response to changes in membrane potential.

• Ligand-Gated and Mechanically-Gated: Other channel types.

Step-by-Step Guidance

1. Recall the different types of ion channels: voltage-gated, ligand-gated, mechanically-gated.

2. Identify which channel responds to changes in voltage across the membrane.

3. Think about their role in action potential generation.

Try solving on your own before revealing the answer!

Q13. What is the name for impulse conduction that appears to jump from one node to the next?

Background

Topic: Action Potential Propagation

This question tests your knowledge of how myelinated axons conduct impulses.

Key Terms:

• Saltatory Conduction: Impulse jumps between nodes of Ranvier.

• Continuous Conduction: Occurs in unmyelinated axons.

Step-by-Step Guidance

1. Recall the difference between myelinated and unmyelinated axons.

2. Identify the process where impulses jump between nodes.

3. Think about the term used for this type of conduction.

Try solving on your own before revealing the answer!

Q14. Myelinated neurons make up what type of matter and transmit impulses how?

Background

Topic: Nervous Tissue Types

This question tests your knowledge of the composition and function of white and gray matter.

Key Terms:

• White Matter: Composed of myelinated axons.

• Impulse Transmission: Myelination increases speed.

Step-by-Step Guidance

1. Recall the difference between white and gray matter.

2. Identify which matter is made up of myelinated neurons.

3. Think about how myelination affects impulse speed.

Try solving on your own before revealing the answer!

Q15. What are ion channels that are always open called?

Background

Topic: Ion Channel Types

This question tests your knowledge of passive ion movement across membranes.

Key Terms:

• Leak Channels: Ion channels that are always open.

• Passive Transport: Movement without energy input.

Step-by-Step Guidance

1. Recall the types of ion channels: gated and non-gated.

2. Identify the channels that allow ions to move freely.

3. Think about their role in maintaining resting membrane potential.

Try solving on your own before revealing the answer!

Q16. What are the three functions of the nervous system?

Background

Topic: Nervous System Functions

This question tests your knowledge of the main roles of the nervous system.

Key Terms:

• Sensory, Integrative, Motor: The three main functions.

• Detection, Processing, Response: Steps in nervous system activity.

Step-by-Step Guidance

1. Recall the sequence of nervous system activity: sensing, processing, acting.

2. Identify the terms for each function.

3. Think about examples for each function.

Try solving on your own before revealing the answer!

Q17. What is the structural classification of most sensory and association neurons?

Background

Topic: Neuron Types

This question tests your knowledge of the structural differences between sensory and association neurons.

Key Terms:

• Unipolar: Most sensory neurons.

• Multipolar: Most association (interneurons).

Step-by-Step Guidance

1. Recall the structural types: unipolar, bipolar, multipolar.

2. Identify which type is typical for sensory neurons.

3. Identify which type is typical for association neurons.

Try solving on your own before revealing the answer!

Q18. Which neuroglial cells line the ventricles of the brain and circulate CSF?

Background

Topic: Neuroglia Functions

This question tests your knowledge of glial cell types and their roles in the CNS.

Key Terms:

• Ependymal Cells: Line ventricles and circulate cerebrospinal fluid (CSF).

• CSF: Fluid that cushions and nourishes the brain.

Step-by-Step Guidance

1. Recall the four main types of neuroglia in the CNS.

2. Identify which type lines the ventricles.

3. Think about their role in producing and circulating CSF.

Try solving on your own before revealing the answer!

Q19. Which ion rushes into the neuron to depolarize and generate the graded potential?

Background

Topic: Membrane Potential Changes

This question tests your knowledge of ions involved in depolarization.

Key Terms:

• Sodium (Na+): Main ion responsible for depolarization.

• Depolarization: Membrane potential becomes less negative.

Step-by-Step Guidance

1. Recall the ions involved in resting and action potentials.

2. Identify which ion moves into the cell during depolarization.

3. Think about the effect of this ion influx on membrane potential.

Try solving on your own before revealing the answer!

Q20. What is the voltage range across the membrane during an action potential?

Background

Topic: Action Potential Voltage Changes

This question tests your knowledge of the typical voltage changes during an action potential.

Key Terms:

• Resting Membrane Potential: Usually around -70 mV.

• Action Potential: Peaks at positive values.

Step-by-Step Guidance

1. Recall the resting membrane potential and the peak of the action potential.

2. Identify the typical voltage range during depolarization and repolarization.

3. Think about the minimum and maximum values reached during an action potential.

Try solving on your own before revealing the answer!