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DAANCE Module 1: Basic Sciences Questions and Answers on the Nervous System, Exams of Nursing

Liberty University (LU)Nursing

A comprehensive set of questions and answers related to the basic sciences of the nervous system. It covers key concepts such as the structure and function of the central nervous system, peripheral nervous system, and autonomic nervous system. Particularly useful for students studying anatomy, physiology, and related fields.

Typology: Exams

2024/2025

Available from 01/23/2025

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DAANCE module 1: Basic Sciences questions
with correct answers
1)What is the role of the central nervous system?
2)What are the 3 subdivisions of the central nervous system? - Answer 1) To
provide overall control of body function
2) Central Nervous System, Peripheral Nervous System, Autonomic Nervous
System
NERVOUS SYSTEM:
1) What are the cells of the nervous system called?
2) What are they responsible for?
3) What is action potential? What happens during this?
4) How is this related to a synapse?
5) What is a synapse? - Answer 1) Neurons
2) Responsible for conducting nerve impulses within the brain and from one body
part to another
3) The nerves threshold of stimulus. When an impulse reaches the threshold, the
impulse travels along the neuron at a constant rate.
4) When an impulse reaches the end of the neuron, it can pass to another neuron
across a synapse.
5) A junction between two neurons.
DEPOLARIZATION/REPOLARIZATION:
1) Explain depolarization.
2) What substance is often the material moving in and out of the membrane?
3) What is the wave of polarization?
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Download DAANCE Module 1: Basic Sciences Questions and Answers on the Nervous System and more Exams Nursing in PDF only on Docsity!

DAANCE module 1: Basic Sciences questions

with correct answers

1)What is the role of the central nervous system? 2)What are the 3 subdivisions of the central nervous system? - Answer 1) To provide overall control of body function

  1. Central Nervous System, Peripheral Nervous System, Autonomic Nervous System NERVOUS SYSTEM:
  2. What are the cells of the nervous system called?
  3. What are they responsible for?
  4. What is action potential? What happens during this?
  5. How is this related to a synapse?
  6. What is a synapse? - Answer 1) Neurons
  7. Responsible for conducting nerve impulses within the brain and from one body part to another
  8. The nerves threshold of stimulus. When an impulse reaches the threshold, the impulse travels along the neuron at a constant rate.
  9. When an impulse reaches the end of the neuron, it can pass to another neuron across a synapse.
  10. A junction between two neurons. DEPOLARIZATION/REPOLARIZATION:
  11. Explain depolarization.
  12. What substance is often the material moving in and out of the membrane?
  13. What is the wave of polarization?
  1. Explain repolarization.
  2. How does this relate to local anesthetics? - Answer 1) The outside of a nerve membrane is positively charged. When those charges move into the membrane, the outside is left negatively charged.
  3. Na+ ions
  4. The movement of changing charges during depolarization.
  5. After the nerve impulse passes through the nerve, the nerve fibers become repolarized, or positively charged, again.
  6. Local anesthetics interfere with Na+ ions traveling through the ion channels, preventing depolarization and slowing or stopping the nerve impulses. SYNAPSES:
  7. What is a terminal button?
  8. What are pre-synaptic and post-synaptic?
  9. What is a synaptic cleft?
  10. What substance is this product dependent on?
  11. What action does this substance have? - Answer 1) The bulge at the end of the nerve, that touches the next nerve.
  12. The nerve before and after the synapse that is active.
  13. The gap between two nerves, which a nerve impulse must 'jump across' to communicate with the next nerve.
  14. Neurotransmitters
  15. They enable transmission of the depolarization wave from one nerve onto the receptor sites of the next. CENTRAL NERVOUS SYSTEM:
  16. What is the central nervous system, and what does it consist of?
  1. What important control centers does it contain?
  2. What else does it contain, and what does this do? - Answer 1) Between the brains core and the spinal cord (inferiorly).
  3. midbrains, pons, medulla oblongata.
  4. Autonomic (automatic) nervous system.
  5. Reticular formation, responsible for consciousness or arousal. BRAINSTEM:
  6. What does the lower portion of the brainstem contain?
  7. What does the pons do?
  8. What does the medulla do? - Answer 1) Pons and medulla.
  9. It connects to the the cerebellum, and controls coordination and movement.
  10. Contains centers which control blood pressure, heart rate, respiratory, and digestion. PERIPHERAL NERVOUS SYSTEM:
  11. What does this system consist of?
  12. What are sensory nerves?
  13. What are motor nerves?
  14. What are the two main components of this system? - Answer 1) Nerves, which carry impulses away from the CNS to parts of the body, and carry impulses from the periphery back to the the CNS.
  15. Nerves that bring messages from the environments back to the CNS (such as touch and pain).
  16. Nerves that send out responses to a muscle, which initiates body movement.
  17. The cranial and spinal nerves.

PERIPHERAL NERVOUS SYSTEM- Cranial Nerves

  1. What are they?
  2. What are the cranial nerves which are exclusively sensory?
  3. Which nerve is both sensory and motor?
  4. Which nerve is primarily a motor nerves?
  5. Which nerve is a primary concern with local anesthesia? - Answer 1) Nerves that start at the base of the brain.
  6. Optic nerve (sight), Olfactory nerve (smell), Auditory nerve (sound).
  7. Trigeminal nerve, which supplies sensation to teeth and jaw, and has a motor branch which supplies the muscles of mastication.
  8. Facial nerve, supplies motor fibers for facial expression such as smiling, frowning, etc.
  9. Trigeminal nerve CRANIAL NERVE, TRIGEMINAL NERVE: Mandible
  10. What are the 3 branches of the nerve?
  11. What nerves are anesthetized when working on the mandible? What is this injection called?
  12. What areas does this affect? - Answer 1) Opthalmic, Maxillary, and Mandibular.
  13. Inferior alveolar and lingual nerves. Mandibular block.
  14. Mandibular teeth, chin, lips, half of the tongue, and the floor of the mouth. CRANIAL NERVE, TRIGEMINAL NERVE: Maxilla
  15. If teeth are not infiltrated individually, what types of blocks can be used?
  16. What do each of these nerves supply? - Answer 1) Posterior superior alveolar, greater palatine, and nasopalatine.
  1. #1- Heart, increases heart rate and strength of contractions. #2 Lung, causes bronchodilation. PARASYMPATHETIC NERVOUS SYSTEM:
  2. What does this system do?
  3. What chemical does this system use? What are the actions of this system called?
  4. What drugs do we use that counteracts this?
  5. How does this system regulate blood press and heart rate?
  6. What are these receptors called? - Answer 1) Creates a vegetative state, such as slowing the heart, increased salivary secretion, and increased digestion. 2)Acetylcholine. Cholinergic.
  7. Glycopyrrolate or atropine.
  8. Receptors in the walls of the aorta, carotid artery, and ventricles of the heart response to changes in pressure and adjust the sympathetic and parasympathetic responses to regulate these.
  9. Baroreceptors. AUTONOMIC NERVOUS SYSTEM- OMS Perspective:
  10. What do the anesthetic drugs utilized in OMS affect?
  11. What do barbiturates and propofol do, and what does this result in?
  12. What does ketamine do, and what does this affect?
  13. What can anticholinergic drugs do, and how does it do this? What are some anticholinergic drugs? - Answer 1) They affect the vital centers in the medulla and the pons that are associated with the autonomic nervous center.
  14. They depress the vital centers, resulting in hypotension and respiratory depression.
  15. This stimulates the vital centers and causes an increase in blood press and pulse.
  1. They can reduce secretion of saliva, by counteracting parasympathetic stimulation. Atropine or glycopyrrolate. AUTONOMIC NERVOUS SYSTEM- OMS Perspective:
  2. Why is epinephrine put into local anesthetics?
  3. How are autonomic drugs, such as epinephrine, useful in medical or anesthetic emergencies?
  4. How is epinephrine used?
  5. How is ephedrine used? How are adrenergic drugs, such as labetalol used?
  6. How are adrenergic drugs such as albuterol used? - Answer 1) It causes vasoconstriction, which decreases 'wash-out' of the anesthetic from the area, and helps control bleeding.
  7. They can emulate or interfere with normal autonomic functions to help manage the emergency.
  8. It is used in cardiac arrest to reestablish electrical conductivity in the heart by stimulating the adrenergic receptors.
  9. It is used in the management of hypotension. Used in the management of hypertension.
  10. To treat asthma and severe allergic attacks. AUTONOMIC NERVOUS SYSTEM- OMS Perspective:
  11. How is atropine used in bradycardia?
  12. What are the roles of the cholinergic receptors in the heart, which normally receive acetylcholine?
  13. How does atropine affect this?
  14. What does this do to treat bradycardia? - Answer 1) It counteracts the neurotransmitter acetylcholine at the parasympathetic receptor sites in the heart.
  15. To maintain the heart rate at a decreased heart level and keep it in check.
  1. Which ventricle has the bigger job, which causes it to have the thickest wall of the 4 chambers? - Answer 1) The right and left ventricles. From the atria.
  2. Ventricle chambers are larger and have thicker walls.
  3. The right ventricle send blood to the lung to be oxygenated.
  4. The left ventricle send blood to the body or peripheral circulation.
  5. The left ventricle. VESSELS AND VALVES:
  6. Which side of the heart is filled with oxygenated blood?
  7. What 3 sources does the right atrium receive blood from?
  8. What additional source is the only one that returns oxygen-rich blood to the heart?
  9. What step is this in blood circulation? - Answer 1) The left side.
  10. Superior Vena Cava, Inferior Vena Cava, and from the heart via the Coronary Sinus.
  11. Pulmonary vein, which comes directly from the lungs.
  12. The first step. VESSELS AND VALVES:
  13. What is the second step in blood circulation?
  14. What valve does this pass through?
  15. How much pressure does this require? - Answer 1) After the right atrium fills with blood, it contracts and forces blood into the right ventricle.
  16. Tricuspid valve.
  17. It is the lowest in the heart, has very little resistance. VESSELS AND VALVES:
  1. What is the third step in blood circulation?
  2. What is unique about the pulmonary artery? - Answer 1) The right ventricle contracts, causing the tricuspid valve to close, and forces the blood through the pulmonary valve into the pulmonary artery, which goes to the lungs.
  3. It is the only artery that carries oxygen-depleted blood. VESSELS AND VALVES:
  4. What is the fourth step in blood circulation?
  5. What part of the RBC is responsible for releasing the waste products, and picking up oxygen?
  6. Where does blood go after it as become oxygen saturated? - Answer 1) Blood arrives at the lungs to be re-oxygenated.
  7. Hemoglobin.
  8. It returns to the left atrium through pulmonary veins. VESSELS AND VALVES:
  9. After the left atrium fills and contracts, where does it go next?
  10. What are the final steps in blood circulation? - Answer 1) It passes through the mitral valve into the left ventricle.
  11. The left ventricle contracts,closing the mitral valve and forcing the blood through the aortic valve and into the aorta. This blood goes to the body.
  12. Right atrium receives oxygen depleted blood from the body.
  13. Right atrium contracts, blood flow through tricuspid valve into right ventricle.
  14. Right ventricle contracts, blood flows through pulmonary artery to the lungs.
  15. Blood is re-oxygenated at lungs, travels through pulmonary veins to the left atrium.
  16. Left atrium contracts, blood flows through mitral valve into the left ventricle.
  1. What do arteries turn into as they leave the heart? What is their final destination?
  2. How do these connect back to the heart? - Answer 1) Arterioles, and then capillaries. They exchange oxygen, carbon dioxide, and other waste from the cells of the body.
  3. Capillaries connect to venules, which are the smallest veins. These turn into small veins, then larger veins, and finally into the the Superior or Inferior Vena Cava. ARTERIES AND VEINS:
  4. What are the major differences between arteries and veins?
  5. What does the layer of muscle do? Which happens during a sympathetic stimulation? What happens after the stimulation disappears?
  6. What is a lumen?
  7. What is vasoconstriction and vasodilatation? - Answer 1) Arteries have much thicker walls to handle press of blood flow. They are more elastic an have a muscular layer around them.
  8. It can expand and contract the artery. It contracts the arterial wall. The artery expands.
  9. It is the hollow core of the artery.
  10. Vasoconstriction is when the diameter of the artery decreases. Vasodilatation is when is increase. HEART RHYTHM: 1)When does the diastolic and systolic pressures occur?
  11. What is the stroke volume? 3)What is the cardiac output? - Answer 1) Diastolic occurs after the atria contract and send blood into the ventricles. When the ventricles relax this is the diastolic pressure. Systolic occurs when the ventricles contract and send blood to the lungs. The pressure in the arteries is the systolic pressure.
  1. The amount of blood pumped by the left ventricle in each beat.
  2. The total amount of blood pumped out of the left ventricle in one minute. HEART RHYTHM:
  3. What is the cardiac cycle?
  4. What is the normal amount of beats per minute?
  5. What is it called of the rate is too low, or high? - Answer 1) One contraction and relaxation of the atria and ventricles, followed by a short pause.
  6. 60-100.
  7. Lower than 60 is called bradycardia. Higher than 100 is called tachycardia. HEART CONDUCTION:
  8. What controls the automaticity of the heart?
  9. What is this node called because of this ability?
  10. What happens if this node is not functioning correctly? Does this work as well?
  • Answer 1) The sinoatrial node.
  1. The 'pacemaker'.
  2. Other 'ectopic pacemakers' can take over. No, the lower in the heart they are located, the less beats per minute they produce. HEART CONDUCTION:
  3. What is the node located between the atria and ventricles called?
  4. What step is this node in creating a heart contraction?
  5. Where is the impulse sent after it reaches this point?
  6. What are the fibers that divide in this area called? - Answer 1) Atrioventricular node.
  7. The second step, after the stimulation of the sinoatrial node.
  1. When the heart is experiencing a lack of oxygen. Dysrhythmias, or abnormal tracings.
  2. The wave of depolarization and repolarization of the heart. CARDIAC MONITORING: 1)What does the 'P' wave represent?
  3. What is the QRS complex? What number per minute does this equal?
  4. What does the 'T' wave represent?
  5. Where do we see reflections of myocardial irritability, or dysrythmias? - Answer
  6. Depolarization, which produces the muscular contraction of the atria.
  7. The activity produced by ventricular contractions. The heart rate.
  8. Repolarization, which makes the ventricles ready to contract again.
  9. In the QRS complex. BLOOD VESSELS OF HEAD AND NECK:
  10. List the path of blood after it leaves the brachiocephalic artery on the right side of the heart.
  11. Where does blood go after leaving the brachiocephalic artery on the left side?
  12. Why are the right and left common carotid arteries important?
  13. Where 2 arteries do they separate into once they reach the mandible? - Answer
  14. The brachiocephalic artery branches into the common carotid artery, which goes to the right side of the neck, and the right subclavian artery, which goes into the right arm.
  15. The left common carotid artery branches directly off the artery and goes into the neck.
  16. They are the one of the best places to check a patient's pulse.
  17. The internal carotid artery, which goes into the skull, and the external carotid artery, which divides into 8 branches.

EXTERNAL CAROTID ARTERY:

Where do these branches supply? Lingual Facial Maxillary Inferior Alveolar - Answer *Lingual- tongue and floor of the mouth *Facial- behind the angle of the mandible to the first and second molars, and the external aspects of the face *Maxillary- internal aspects of the face, such as maxilla, sinuses, maxillary teeth and portions of the nose *Inferior Alveolar- the mandible and teeth, terminates at the mental artery. SUPERFICIAL VEINS OF THE HEAD AND NECK:

  1. What vein is the first step in bringing blood back to the heart from the face? What is this divided into?
  2. What are the next steps? - Answer 1) The facial vein. Three tributaries, which drain blood from the face, under the nose, and the eyelids.
  3. The facial vein meets the retromandibular vein to form the common facial vein. They enter the internal jugular vein. DEEP VEINS OF THE HEAD AND NECK:
  4. Where do the deep components of the venous system start, and what is it called?
  5. What does this network surround?
  6. Where does this drain into? - Answer 1) Behind the maxilla, called the pterygoid plexus.
  7. The maxillary artery.