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Questions and Answers

What is the primary function of the parasympathetic division of the nervous system?

  • To regulate emergency responses
  • To manage 'rest-and-digest' activities (correct)
  • To prepare the body for intense physical activity
  • To enhance sensory neuron activity

Which fibers are known for conducting impulses related to pain, touch, and temperature sensations?

  • A fibers
  • D fibers
  • B fibers
  • C fibers (correct)

What role does the enteric nervous system (ENS) primarily serve?

  • It regulates voluntary muscle movements
  • It enhances reflex actions in skeletal muscles
  • It functions involuntarily and independently of the CNS (correct)
  • It is primarily involved in sensory perception

What is the speed range of nerve impulse propagation for C fibers?

<p>0.5-2 m/sec (C)</p> Signup and view all the answers

What type of neurons govern the contraction of smooth muscle in the gastrointestinal tract?

<p>Enteric motor neurons (C)</p> Signup and view all the answers

How many neurons approximately make up the enteric nervous system?

<p>100 million (C)</p> Signup and view all the answers

What type of fibers are characterized as having diameters between 2-3 micrometers and are myelinated?

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

What do sensory neurons of the enteric nervous system primarily monitor?

<p>Changes within the GI tract (D)</p> Signup and view all the answers

What is the significance of the decussation of pyramids?

<p>It explains the contralateral control of voluntary movements. (A)</p> Signup and view all the answers

Which of these cranial nerves is primarily involved in taste and swallowing?

<p>Glossopharyngeal (IX) Nerve (A)</p> Signup and view all the answers

What role does the medullary respiratory center play?

<p>It adjusts the basic rhythm of breathing. (C)</p> Signup and view all the answers

Which cranial nerve is responsible for conveying impulses related to hearing?

<p>Vestibulocochlear (VIII) Nerve (D)</p> Signup and view all the answers

What does the posterior column–medial lemniscus pathway primarily convey?

<p>Sensory information related to fine touch and proprioception (A)</p> Signup and view all the answers

Which nerve primarily controls the muscles of chewing?

<p>Trigeminal (V) Nerve (B)</p> Signup and view all the answers

Which structure regulates cardiovascular functions in the medulla?

<p>Cardiovascular Centre (D)</p> Signup and view all the answers

What does the vagus nerve mainly provide motor impulses to?

<p>The pharynx and larynx (C)</p> Signup and view all the answers

What is the primary function of ribosomes in neuronal cell bodies?

<p>To synthesize proteins (A)</p> Signup and view all the answers

Which part of the neuron is primarily responsible for the transmission of nerve impulses?

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

What comprises the cytoskeleton of a neuron?

<p>Neurofibrils and microtubules (D)</p> Signup and view all the answers

What is the axoplasm?

<p>The cytoplasm of an axon (A)</p> Signup and view all the answers

Which structure serves as the site of communication between two neurons?

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

What type of structures can be found at the end of an axon?

<p>Synaptic end bulbs and varicosities (C)</p> Signup and view all the answers

What is the primary role of Nissl bodies within the neuronal cell body?

<p>To synthesize proteins (C)</p> Signup and view all the answers

Which of the following statements is true regarding protein synthesis in the axon?

<p>It does not occur in the axon due to lack of rough endoplasmic reticulum (D)</p> Signup and view all the answers

What is the primary function of the reticular activating system (RAS)?

<p>Govern unconscious skeletal muscle movements (A)</p> Signup and view all the answers

Which cerebellar lobe is primarily responsible for maintaining equilibrium and balance?

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

What structural characteristic distinguishes the cerebellar cortex?

<p>It contains a series of slender, parallel folds (B)</p> Signup and view all the answers

Which of the following structures is part of the cerebellar peduncles?

<p>Axons transmitting impulses (B)</p> Signup and view all the answers

What separates the cerebellum from the cerebrum?

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

The interthalamic adhesion primarily serves to connect which structures?

<p>Right and left halves of the thalamus (D)</p> Signup and view all the answers

Which paired structure makes up 80% of the diencephalon?

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

What is the main role of the cerebellar peduncles?

<p>Conducting impulses between the cerebellum and the brain (D)</p> Signup and view all the answers

What is the primary function of the limbic system?

<p>Controlling emotional responses (D)</p> Signup and view all the answers

Where is the primary somatosensory area located?

<p>In the postcentral gyrus of the parietal lobe (C)</p> Signup and view all the answers

Which sensory modalities does the primary somatosensory area NOT process?

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

What determines the size of the cortical area in the primary somatosensory area?

<p>The number of receptors present (A)</p> Signup and view all the answers

Which structure is part of the olfactory pathway?

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

What is the role of the primary motor area?

<p>Controlling voluntary muscle contractions (A)</p> Signup and view all the answers

Which area of the brain is directly involved in receiving touch and temperature sensations?

<p>Primary somatosensory area (C)</p> Signup and view all the answers

Which structure is positioned anterior to the central sulcus?

<p>Primary motor area (D)</p> Signup and view all the answers

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