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Questions and Answers
What is the correct sequence of steps in producing a reflex action where the hand is withdrawn from a hot object?
What is the correct sequence of steps in producing a reflex action where the hand is withdrawn from a hot object?
- 2→1→3
- 1→2→3
- 3→2→1
- 3→1→2 (correct)
What does the central nervous system consist of?
What does the central nervous system consist of?
- brain and spinal cord only (correct)
- brain, spinal cord and peripheral nerves
- brain only
- spinal cord and peripheral nerves only
What do the dots at the synapse represent?
What do the dots at the synapse represent?
- receptor molecule
- vesicle
- synaptic cleft
- neurotransmitter (correct)
Which of the following can be considered an effector in a reflex arc?
Which of the following can be considered an effector in a reflex arc?
Which identification is correct for neurone P and neurone Q in a reflex arc with respect to neurotransmitter direction?
Which identification is correct for neurone P and neurone Q in a reflex arc with respect to neurotransmitter direction?
Which of the following parts are included in the central nervous system?
Which of the following parts are included in the central nervous system?
What is the primary function of a synapse?
What is the primary function of a synapse?
Which situation illustrates a voluntary action?
Which situation illustrates a voluntary action?
In a reflex arc, which structures connect to a motor neurone via synapses?
In a reflex arc, which structures connect to a motor neurone via synapses?
What occurs to the iris muscles when transitioning from bright light to dim light?
What occurs to the iris muscles when transitioning from bright light to dim light?
Which of the following can function as an effector in a reflex arc?
Which of the following can function as an effector in a reflex arc?
Where are neurotransmitter molecules stored in a synapse?
Where are neurotransmitter molecules stored in a synapse?
What happens when synaptic vesicles release their contents?
What happens when synaptic vesicles release their contents?
What passes from P to Q in a synapse?
What passes from P to Q in a synapse?
What is the correct sequence of structures through which a nerve impulse passes in a reflex arc?
What is the correct sequence of structures through which a nerve impulse passes in a reflex arc?
Which structure contains relay neurones?
Which structure contains relay neurones?
What could cause a man to move his hand but not feel objects touching it after an injury?
What could cause a man to move his hand but not feel objects touching it after an injury?
Sensory neurones conduct impulses from what to where?
Sensory neurones conduct impulses from what to where?
Which component is responsible for ensuring that the nerve impulses travel in one direction only within a reflex arc?
Which component is responsible for ensuring that the nerve impulses travel in one direction only within a reflex arc?
Which part of the nervous system primarily handles reflex actions?
Which part of the nervous system primarily handles reflex actions?
In a reflex arc, what is the role of the effector?
In a reflex arc, what is the role of the effector?
Which of the following best describes how motor neurones operate?
Which of the following best describes how motor neurones operate?
What happens at the synapse?
What happens at the synapse?
Which statement accurately describes the role of the effector in a reflex action?
Which statement accurately describes the role of the effector in a reflex action?
What substance is primarily contained within the vesicles of neurones at synapses?
What substance is primarily contained within the vesicles of neurones at synapses?
What process allows an impulse to be transmitted across a synapse?
What process allows an impulse to be transmitted across a synapse?
In a reflex action, which component is considered the receptor?
In a reflex action, which component is considered the receptor?
Which correctly describes the effect of heroin when it binds to receptors in a synapse?
Which correctly describes the effect of heroin when it binds to receptors in a synapse?
What characteristic of involuntary responses differentiates them from voluntary responses?
What characteristic of involuntary responses differentiates them from voluntary responses?
Which sequence correctly orders the processes occurring at a synapse during neurotransmission?
Which sequence correctly orders the processes occurring at a synapse during neurotransmission?
Which labelled molecule in a synapse is most closely associated with the transmission of signals?
Which labelled molecule in a synapse is most closely associated with the transmission of signals?
What is the primary function of a motor neurone within a reflex arc?
What is the primary function of a motor neurone within a reflex arc?
Which part of the nervous system is mainly involved in the processing of sensory information during a reflex action?
Which part of the nervous system is mainly involved in the processing of sensory information during a reflex action?
Flashcards
What is the central nervous system?
What is the central nervous system?
The brain and spinal cord together make up the central nervous system.
What is a synapse?
What is a synapse?
A synapse is the junction between two neurons, where a signal is transmitted from one neuron to another.
What is a voluntary action?
What is a voluntary action?
A voluntary action is a conscious, intentional movement controlled by the brain, such as raising your hand.
What components of a reflex arc are connected by synapses?
What components of a reflex arc are connected by synapses?
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What happens to the iris muscles in dim light?
What happens to the iris muscles in dim light?
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Where are neurotransmitter molecules stored?
Where are neurotransmitter molecules stored?
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What is an effector?
What is an effector?
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What is the function of a synapse?
What is the function of a synapse?
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Synaptic cleft
Synaptic cleft
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Neurotransmitter receptor
Neurotransmitter receptor
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Vesicle
Vesicle
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Neurotransmitter
Neurotransmitter
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Reflex arc pathway
Reflex arc pathway
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Sensory neuron
Sensory neuron
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Motor neuron
Motor neuron
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Relay neuron
Relay neuron
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Effector
Effector
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Synaptic transmission
Synaptic transmission
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What is a sensory neuron?
What is a sensory neuron?
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What is a motor neuron?
What is a motor neuron?
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What is a reflex arc?
What is a reflex arc?
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What is a neurotransmitter?
What is a neurotransmitter?
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What are vesicles?
What are vesicles?
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What is a receptor?
What is a receptor?
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How does heroin affect the synapse?
How does heroin affect the synapse?
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What is an involuntary response?
What is an involuntary response?
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Study Notes
Nervous Control in Humans
- Central Nervous System (CNS): Composed of the brain and spinal cord.
- Parts forming the CNS: Parts 1 and 2 form the CNS.
- Reflex Arc: A neural pathway that controls a reflex action.
- Contains components in a specific order: receptors → sensory neurons → relay neurons → motor neurons → effectors.
- Synapse: The gap between neurons where neurotransmitters facilitate the transmission of nerve impulses.
- Neurotransmitters: Chemical messengers that carry signals across the synapse.
- Effectors: Muscles or glands that respond to nerve impulses.
- A muscle or gland can be an effector in a reflex arc.
- Example: Effector in a reflex action is a muscle that moves the body part away from a stimulus.
- Vesicles: Contain neurotransmitter molecules in the synapse. Found in the nerve ending close to the synaptic gap.
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Description
Explore the intricate workings of the central nervous system (CNS) in this quiz, focusing on its components, the reflex arc, synapses, and neurotransmitters. Understand how nerve impulses control muscle responses and the role of effectors in reflex actions. Test your knowledge on how these elements interact to facilitate human nervous control.
