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The MCQs below are drawn from the Psychology subject category.
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4751
Which nervous system division is characterized by ganglia originating primarily from the thoracic and lumbar segments of the spinal cord and terminating in ganglia located near the spinal column?
The sympathetic nervous system, often associated with the 'fight-or-flight' response, features preganglionic neurons that originate in the thoracolumbar region of the spinal cord. These fibers typically synapse in the sympathetic chain ganglia, which are situated in close proximity to the spinal cord, allowing for rapid, coordinated physiological responses across the body.
4752
Which division of the autonomic nervous system is responsible for increasing heart rate?
The sympathetic nervous system is a component of the autonomic nervous system that prepares the body for 'fight-or-flight' responses. When activated, it triggers physiological changes such as an increased heart rate, dilated pupils, and the release of glucose from the liver to provide energy for immediate physical action in response to perceived stress or danger.
4753
Which of the following physiological changes is associated with the activation of the sympathetic nervous system?
The sympathetic nervous system triggers the 'fight-or-flight' response, preparing the body for emergency action. This includes releasing glucose (sugar) from the liver for energy, increasing perspiration to cool the body, and accelerating respiration to increase oxygen intake. These coordinated physiological responses ensure the body is ready to react quickly to perceived threats or stressors.
4754
Which division of the autonomic nervous system is responsible for activating the body's 'fight or flight' response?
The sympathetic nervous system is a branch of the autonomic nervous system that mobilizes the body's resources during stressful or emergency situations. It triggers physiological changes such as increased heart rate, dilated pupils, and the release of adrenaline to prepare the organism to either fight or flee.
4755
What are the two primary divisions of the autonomic nervous system?
The autonomic nervous system regulates involuntary bodily functions and is divided into the sympathetic nervous system, which prepares the body for 'fight or flight' responses, and the parasympathetic nervous system, which promotes 'rest and digest' activities, helping the body return to a state of homeostasis.
4756
What are the distinct primary functions of the sympathetic and parasympathetic nervous systems?
The autonomic nervous system is divided into two main branches: the sympathetic and parasympathetic systems. The sympathetic nervous system is responsible for the 'fight or flight' response, mobilizing energy and resources during stressful situations. The parasympathetic nervous system, often called the 'rest and digest' system, works to conserve energy and return the body to a state of homeostasis after the stressor has passed.
4757
Which division of the autonomic nervous system is primarily activated during exposure to mild, unpleasant stimuli?
The sympathetic nervous system is responsible for the 'fight-or-flight' response. Even when encountering mild or unpleasant stimuli, the body often initiates a sympathetic arousal pattern to prepare for potential threats. This involves physiological changes such as increased heart rate and alertness, which are characteristic of sympathetic activation rather than the restorative functions of the parasympathetic nervous system.
4758
Saima experienced an increased heart rate and jitteriness after taking hay fever medication. Which system was likely stimulated by this medication?
The sympathetic nervous system is responsible for the body's 'fight-or-flight' response. When activated, it increases heart rate, dilates pupils, and causes feelings of agitation or jitteriness. Certain medications can inadvertently stimulate this system, leading to these physiological symptoms as a side effect.
4759
Which division of the autonomic nervous system is responsible for activating the body's 'fight-or-flight' response during stressful situations?
The sympathetic nervous system is the branch of the autonomic nervous system that triggers the fight-or-flight response. It prepares the body for immediate action by increasing heart rate, dilating pupils, and mobilizing energy stores to respond to perceived threats or stressors.
4760
Which division of the autonomic nervous system is responsible for mobilizing the body's resources during emergency situations?
The sympathetic nervous system is responsible for the 'fight or flight' response. When faced with a threat, it triggers physiological changes such as increased heart rate, dilated pupils, and redirected blood flow to muscles to prepare the body for immediate action. This system works in opposition to the parasympathetic nervous system, which focuses on 'rest and digest' activities.
