Human Nervous System Overview
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Questions and Answers

What is the main function of the nervous system?

  • Controlling all activities of the body (correct)
  • Breaking down food
  • Producing hormones
  • Regulating body temperature

Which part of the nervous system is often referred to as the 'Command Central'?

  • Senses
  • Brain and Spinal Cord (correct)
  • Spinal cord
  • Peripheral Nervous System (PNS)

What is the function of dendrites in a neuron?

  • Transfer information to the cell body (correct)
  • Protect and electrically insulate the axon
  • Transmit information away from the soma
  • Form synapses with neighboring neurons

Which part of a neuron is responsible for transmitting information away from the cell body?

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

What is the function of myelin sheath in a neuron?

<p>Increase the speed of nerve impulses (B)</p> Signup and view all the answers

Which type of nerve cell carries impulses from receptors to the Central Nervous System?

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

Which layer of the meninges is the innermost and directly adheres to the brain's surface?

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

Where does the arachnoid mater lie in relation to the dura mater?

<p>Below the dura mater (C)</p> Signup and view all the answers

What structures allow draining of cerebrospinal fluid into the dural blood sinuses?

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

Which layer of the meninges is composed of two layers of fibrous connective tissue, one periosteal and one meningeal?

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

Where is the subarachnoid space located in relation to the arachnoid and pia maters?

<p>Deep to the arachnoid and superficial to the pia mater (D)</p> Signup and view all the answers

What protects the neurons of the brain by preventing various toxins and microorganisms from entering?

<p>Blood Brain Barrier (C)</p> Signup and view all the answers

Which system is responsible for flight or fight reactions of the body?

<p>Sympathetic Nervous System (A)</p> Signup and view all the answers

What anatomical structure separates the cerebral hemispheres?

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

Which disorder involves blockage or interruption of blood flow to a brain region?

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

Which part of the brain is involved in vigorous exercise, excitement, and fear-provoking stimuli?

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

What congenital defect involves incomplete development of the brain and skull?

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

Which part of the neuron carries impulses from the CNS to an effector?

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

What is responsible for the transmission of signals at the synapse?

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

Which part of the brain is responsible for controlling automatic behaviors essential for survival?

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

Which region of the brain is responsible for the control of the endocrine system through the pituitary gland?

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

Which nerve is solely responsible for carrying afferent impulses for the sense of smell?

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

Which cranial nerve innervates the lateral rectus muscle?

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

What is the function of the trochlear nerve?

<p>Innervating the superior oblique muscle (A)</p> Signup and view all the answers

Which part of the brain serves to keep the cerebral cortex alert and conscious?

<p>Reticular activating system (D)</p> Signup and view all the answers

Which division of the trigeminal nerve runs from the face to the pons via the superior orbital fissure?

<p>Ophthalmic (V1) (A)</p> Signup and view all the answers

What causes Bell's palsy?

<p>Herpes simplex I virus infection (A)</p> Signup and view all the answers

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