Neuron Structure and Function

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Questions and Answers

What type of neurons are responsible for transmitting impulses from sensory receptors to the central nervous system?

  • Interneurons
  • Multipolar neurons
  • Sensory neurons (correct)
  • Motor neurons

Where are the cell bodies of most sensory neurons located?

  • In the brain
  • In the peripheral nervous system (correct)
  • In the spinal cord
  • In the central nervous system

What type of neurons have cell bodies that reside in the central nervous system?

  • Unipolar neurons
  • Sensory neurons
  • Motor neurons
  • Interneurons (correct)

What is the primary function of interneurons?

<p>To integrate and process information from sensory neurons (B)</p> Signup and view all the answers

What type of neurons are multipolar?

<p>All of the above (D)</p> Signup and view all the answers

What is the term for the pathway of neurons that complete the communication between sensory and motor neurons?

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

What is the function of the axon?

<p>Transmitting information to other neurons (B)</p> Signup and view all the answers

What is the purpose of myelin on axons?

<p>To speed up the action potential (A)</p> Signup and view all the answers

What is the term for the ability of neurons to respond to a stimulus and convert it to an action potential?

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

What is the term for the swollen ends of some axon terminals?

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

What type of neurons have several dendrites and one axon?

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

What is the term for neurons that transmit information from sensory receptors to the CNS?

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

What is the primary function of synapses?

<p>To facilitate communication between neurons or between a neuron and another cell (B)</p> Signup and view all the answers

What type of synapse allows for the synchronization of function?

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

What is the term for the space between the communicating neurons in a chemical synapse?

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

What type of neurotransmitter is involved in emotional responses, addictive behaviors, and skeletal muscle tone?

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

What type of neuroglial cell forms the myelin sheath of CNS neurons?

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

What is the function of the blood-brain barrier?

<p>To protect the brain from harmful substances (B)</p> Signup and view all the answers

What type of neuroglial cell is involved in the removal of debris and phagocytosis of microbes?

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

What is the term for a cluster of neuronal cell bodies in the CNS?

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

What part of the spinal cord tapers into a structure called the conus medullaris?

<p>Spinal cord at L2 (D)</p> Signup and view all the answers

What is the term for the small tube in the centre of the spinal cord that contains cerebrospinal fluid?

<p>Central canal (D)</p> Signup and view all the answers

What is the function of the anterior horn in the spinal cord?

<p>Contains motor nuclei (D)</p> Signup and view all the answers

What is the function of the lateral horn in the spinal cord?

<p>Contains sympathetic nuclei (A)</p> Signup and view all the answers

What is the function of the dorsal horn in the spinal cord?

<p>Consists of sensory neurons and interneurons (B)</p> Signup and view all the answers

What is the function of the reticular formation in the brain stem?

<p>A net-like structure that extends through the brainstem (C)</p> Signup and view all the answers

What is the function of the pons?

<p>Involved in reflex visual activities (D)</p> Signup and view all the answers

What is the function of the medulla oblongata?

<p>Contains centres for the control of heart rate, blood pressure, breathing, swallowing, and vomiting (B)</p> Signup and view all the answers

What is the path of an axon that travels up to the brain as part of a sensory tract?

<p>Dorsal root ganglion to dorsal horn to white matter (C)</p> Signup and view all the answers

Which part of the spinal cord receives the sensory input from the dorsal root ganglion?

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

Which type of motor output involves the lateral horn and anterior root?

<p>Autonomic motor output (D)</p> Signup and view all the answers

Which direction does the axon of a somatic motor neuron extend after synapsing with the motor tract?

<p>centrifugally towards the spinal nerve (D)</p> Signup and view all the answers

What is the role of the dorsal root ganglion in the processing of sensory input?

<p>To receive and process sensory input from peripheral receptors (C)</p> Signup and view all the answers

What is the destination of the axon that enters the dorsal horn and synapses with an interneuron?

<p>The ventral horn as part of a spinal reflex pathway (B)</p> Signup and view all the answers

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