1)Physiology
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Questions and Answers

What is the primary function of the somatic nervous system?

  • To provide involuntary control of bodily functions
  • To control the functions of internal organs
  • To process sensory information from the external environment
  • To control the movements of the musculoskeletal system (correct)

How does the autonomic nervous system differ from the somatic nervous system?

  • The autonomic system controls internal organs, while the somatic system controls external sensations
  • The autonomic system produces reflex activations and works involuntarily, while the somatic system works voluntarily (correct)
  • The autonomic system is activated by incoming senses, while the somatic system is activated by the body's needs
  • The autonomic system works voluntarily, while the somatic system works involuntarily

Which of the following is considered a special sense?

  • Pain
  • Touch
  • Proprioception
  • Vision (correct)

Where are the receptors for touch, pressure, proprioception, and pain located?

<p>Throughout the skin and underlying tissue (B)</p> Signup and view all the answers

What is the primary function of the special senses?

<p>To process sensory information from the external environment (A)</p> Signup and view all the answers

What is the purpose of the somatosensory system's receptors?

<p>To provide awareness of activity in the surrounding area and allow appropriate or protective actions to be taken (D)</p> Signup and view all the answers

Which type of receptor is stimulated by chemicals in the blood?

<p>Chemoreceptor (B)</p> Signup and view all the answers

Which type of mechanoreceptor is sensitive to light touch in glabrous skin?

<p>Meissner's corpuscles (D)</p> Signup and view all the answers

What is the function of Ruffini endings?

<p>Sense continuous deformation, such as heavy touch or pressure (B)</p> Signup and view all the answers

Which type of mechanoreceptor is stimulated by rapid movement on the skin?

<p>Pacinian corpuscles (B)</p> Signup and view all the answers

Which type of receptor is stimulated by light?

<p>Photoreceptor (B)</p> Signup and view all the answers

What is the function of free nerve endings?

<p>Respond to pain, touch, pressure, and thermal stimuli (A)</p> Signup and view all the answers

What type of sensory receptors are Hair Follicle Receptors?

<p>Phasic receptors (A)</p> Signup and view all the answers

What constitutes a 'sensory unit'?

<p>A single sensory axon and its peripheral branches (D)</p> Signup and view all the answers

What is the 'receptive field' in the context of sensory receptors?

<p>The area where a stimulus produces a sensory effect in the clusters of neighboring receptors (D)</p> Signup and view all the answers

What determines the intensity of a stimulus according to the text?

<p>Both the frequency of impulse transmission and the number of receptors involved (A)</p> Signup and view all the answers

What affects the senses according to the 'Law of Specific Energies' mentioned in the text?

<p>The type of sensation (modality) does not change as intensity increases (D)</p> Signup and view all the answers

What determines the ability to discriminate between two separate stimuli applied together?

<p>Both the distance between the stimuli and the type of sensory receptors involved (D)</p> Signup and view all the answers

Which type of sensory fibers enter the spinal cord via dorsal roots?

<p>Somatic and part of autonomic (A)</p> Signup and view all the answers

Where are the cell bodies of somatic afferents located?

<p>Spinal ganglion (B)</p> Signup and view all the answers

What do lesions in the Dorsal Column-Medial Lemniscal System cause?

<p>Disorders of balance (D)</p> Signup and view all the answers

Which receptors are associated with the Dorsal Column-Medial Lemniscus System for proprioception and fine touch?

<p>Muscle spindles, Golgi tendon organs, Ruffini Endings (A)</p> Signup and view all the answers

Where do the afferents of the Dorsal Column - Medial Lemniscus System travel in the spinal cord?

<p>Dorsal horn (A)</p> Signup and view all the answers

Which area in the brain contains the third neurons related to the Dorsal Column-Medial Lemniscal System?

<p>Ventral posterolateral nucleus of Thalamus (B)</p> Signup and view all the answers

What percentage of sensory inputs that enter the central nervous system are eliminated?

<p>99% (C)</p> Signup and view all the answers

Which type of receptor detects distant senses such as light and sound?

<p>Teleceptors (A)</p> Signup and view all the answers

What is the function of receptors?

<p>Both a and b (C)</p> Signup and view all the answers

What type of receptors perceive stimuli from the body's internal environment?

<p>Interoceptors (B)</p> Signup and view all the answers

What happens when a receptor potential reaches a threshold voltage?

<p>The receptor potential is converted into an action potential in the sensory axon (C)</p> Signup and view all the answers
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