Internal Environment And Homeostasis Trivia Quiz

80 Questions | Total Attempts: 302

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Internal Environment And Homeostasis Trivia Quiz

Are you aware of Internal environment and homeostasis? If you have learned about the process, there are a lot of things that take place when it comes to the human body and its adaptation to changes. Do you feel like you know enough to help you pass this test? Well take up the quiz below and get to find out for sure.


Questions and Answers
  • 1. 
    Which of the following fluids constitutes a portion of the internal environment:
    • A. 

      Interstitial fluid

    • B. 

      Plasma

    • C. 

      Both

    • D. 

      Neither

  • 2. 
    Homeostasis refers to the: 
    • A. 

      Ability of humans to stand on two feet

    • B. 

      Capability to control the external surroundings of the organism

    • C. 

      Nearly constant conditions that are maintained in the internal environment of multicellular organisms

  • 3. 
    Interstitial fluid is:
    • A. 

      Larger in volume than the plasma volume

    • B. 

      One of the extracellular fluids in the body

    • C. 

      Part of the internal environment

    • D. 

      The region found between cells

    • E. 

      All of the above

  • 4. 
    Select the response demonstrating homeostasis
    • A. 

      Blood sugar drops during starvation

    • B. 

      Body temperature rises during fever

    • C. 

      The acidity of the extracellular fluid remains the same as diet changes

    • D. 

      An individual slips into irreversible shock

  • 5. 
    Plasma osmolarity:
    • A. 

      Has a range of 290 to 310 mOsmoles

    • B. 

      Is critical for maintaining fluid compartmentalization

    • C. 

      Is important for proper cell function

    • D. 

      Is equal to extracellular fluid osmolarity

    • E. 

      All of the above

  • 6. 
    If a decrease in blood pressure were the stimulus for a negative feedback control system, the response produced by the effector cells of the control system would: 
    • A. 

      Decrease blood pressure

    • B. 

      Increase blood pressure

    • C. 

      No change blood pressure

  • 7. 
    A decrease in the hematocrit of a patient from 55% to 40% could occur if there was a (n): 
    • A. 

      Increase in erythrocyte production

    • B. 

      Decrease in blood plasma volume

    • C. 

      Insufficient vitamin B12

    • D. 

      Both a and b are correct

    • E. 

      None of the above are correct

  • 8. 
    Which of the following will stimulate the production of erythrocytes by the bone marrow:
    • A. 

      Increased arterial oxygen partial pressure

    • B. 

      Increased circulating concentrations of glucocorticoids

    • C. 

      Increased circulating erythropoietin

    • D. 

      All of the above

  • 9. 
    Blood flowing from the lungs to the heart in the pulmonary veins enters the:
    • A. 

      Left atrium

    • B. 

      Left ventricle

    • C. 

      Right atrium

    • D. 

      Right ventricle

  • 10. 
    A decrease in the value of which of the following will increase resistance to blood flow:
    • A. 

      Blood vessel length

    • B. 

      Blood vessel radius

    • C. 

      Blood vessel viscosity

  • 11. 
    Cardiac action potentials are transmitted from the pacemaker region throughout the rest of the heart by:
    • A. 

      Gap junctions between adjacent cardiac muscle cells

    • B. 

      Nerves from the pacemaker region that synapse on individual cardiac muscle cells

    • C. 

      Paracrine agent released from cardiac muscle cells

    • D. 

      Synapses between adjacent cardiac muscle cells

  • 12. 
    The ion principally responsible for the resting membrane potential is: 
    • A. 

      Calcium

    • B. 

      Chloride

    • C. 

      Potassium

    • D. 

      Sodium

  • 13. 
    The plateau phase of the cardiac action potential is the result of an increased membrane permeability to: 
    • A. 

      Calcium ions

    • B. 

      Chloride ions

    • C. 

      Potassium ions

    • D. 

      Sodium ions

  • 14. 
    If the SA node of the heart were destroyed, the atria and the ventricles would no longer contact
    • A. 

      True

    • B. 

      False

  • 15. 
    Which of the following is responsible for the change in resting membrane potential in the ischemic zone of the heart?
    • A. 

      The permeability of ions is altered

    • B. 

      The Na+ / K+ ATPase pumps have limited action

    • C. 

      The gap junctions no longer facilitate conduction

  • 16. 
    The T wave of the electrocardiogram corresponds with which phase of cardiac activity?
    • A. 

      Contraction of the atria

    • B. 

      Contraction of the ventricles

    • C. 

      Relaxation of the atria

    • D. 

      Relaxation of ventricles

  • 17. 
    The heart is innervated by the: 
    • A. 

      Autonomic nervous system

    • B. 

      Central nervous system

    • C. 

      Peripheral nervous system

    • D. 

      Both A and C are correct

    • E. 

      All of the above

  • 18. 
    Atropine is a drug that blocks the action of acetylcholine at muscarinic receptors. How will the administration of atropine affect heart rate?    
    • A. 

      Heart rate will increase

    • B. 

      Heart rate will decrease

    • C. 

      Heart rate will not change

  • 19. 
    A patient presents with a hematocrit of 68%. What additional piece of evidence from the choices below would be of the greatest help in differentiating a diagnosis for this patient?
    • A. 

      Blood pressure

    • B. 

      Heart rate

    • C. 

      Hemoglobin levels

    • D. 

      Leukocyte count

  • 20. 
    With a hematocrit of 68%, what is the best differential diagnosis?
    • A. 

      Increased red blood cell formation or increased erythropoietin

    • B. 

      Increased red blood cell formation or decreased red blood cell destruction

    • C. 

      Increased red blood cell numbers or reduced blood plasma volume

    • D. 

      Decreased red blood cell numbers or increased blood plasma volume

  • 21. 
    The volume of blood pumped by each ventricle during one cardiac cycle is: 
    • A. 

      Cardiac output

    • B. 

      End diastolic volume

    • C. 

      End systolic volume

    • D. 

      Stroke volume

  • 22. 
    During mid-diastole:
    • A. 

      All valves are closed

    • B. 

      Aortic and pulmonary valves are open

    • C. 

      Ventricular pressure is greater than atrial pressure

    • D. 

      All of the above

    • E. 

      None of the above

  • 23. 
    During isovolumetric ventricular contraction: 
    • A. 

      All valves into and out of the heart are closed

    • B. 

      Blood is being ejected from the ventricles

    • C. 

      Blood is flowing from the atria to the ventricles

    • D. 

      All of the above

  • 24. 
    Question 24if an individual has an aortic stenosis, then: 
    • A. 

      Blood will pass into the left ventricle from the aorta during diastole

    • B. 

      Blood will not pass into the right ventricle from the right atrium

    • C. 

      The ejection of blood into the left ventricle will be enhanced

    • D. 

      The ejection of blood through the valve during systole will be restricted

  • 25. 
    Question 25Insufficiency of the left AV valve will produce a murmur heard during: 
    • A. 

      Systole

    • B. 

      Diastole