Ammar Physiology Exam

30 Questions | Total Attempts: 762

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Physiology Quizzes & Trivia

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Questions and Answers
  • 1. 
     The last human instinct activated during the life of human is : 
    • A. 

      Maternity

    • B. 

      Food

    • C. 

      Sex

    • D. 

      Two answers are correct

  • 2. 
    Which of the following systems is NOT directly involved in maintaining homeostasis?
    • A. 

      Renal system.

    • B. 

      Immune system.

    • C. 

      Circulatory system.

    • D. 

      Respiratory system.

  • 3. 
    Sweating initiated in responses to a rise in body temperature that occurs on exposure to a hot environment, evaporation of the sweat cools the body. If environmental temperature rise 17 cc and the gain is 33, so body temperature will be: 
    • A. 

      Normal +0.5.

    • B. 

      Normal +1

    • C. 

      Normal -1

    • D. 

      Normal -0.5.

  • 4. 
    If two control systems, have gain of 4 and 3 respectively then which of the following is correct: 
    • A. 

      First system correction is better than the second system.

    • B. 

      Second system correction is better than first system correction

    • C. 

      First system error is higher than second system error

    • D. 

      None of the above

  • 5. 
    The rate of O2 diffusion across a cell membrane could be increased by increasing the: 
    • A. 

      Concentration gradient (difference in concentration) across the membrane.

    • B. 

      Plasma membrane thickness.

    • C. 

      Amount of ATP.

    • D. 

      Number of carrier proteins in the plasma membrane.

  • 6. 
     Facilitated diffusion: 
    • A. 

      Saturate at high solute concentration.

    • B. 

      Active diffusion.

    • C. 

      Rate of diffusion is dependent on concentration gradient only.

    • D. 

      Na+/K+ pump is an example.

  • 7. 
    Blood analysis showed that a hematocrit is 40٪ assume that the plasma volume is 3000 the blood volume of the patient is in liters is :
    • A. 

      3

    • B. 

      6

    • C. 

      5

    • D. 

      5.5

  • 8. 
    All of the following creatures have maternity instinct except : 
    • A. 

      Humans

    • B. 

      Birds

    • C. 

      Pigs

    • D. 

      Turtles

  • 9. 
    The molarity of a 4% solution of NaCI is 680 mmol/L. The molecular weight of NaCI is 58.5. What is the osmolarity of a 2% solution of NaCI (in mOsm/L)? 
    • A. 

      680

    • B. 

      340

    • C. 

      1360

    • D. 

      300

  • 10. 
     A patient weighs 50 kg, and has a fluid distribution and osmolarity that are normal (i.e. total body fluid is 60 % of body weight, & ICS is 40% of body weight, total osmotic content is 9000 mosmolar). This individual's osmolarity of body fluid would be: 
    • A. 

      250

    • B. 

      600

    • C. 

      150

    • D. 

      300

  • 11. 
     Cell volume: 
    • A. 

      Will decrease when active Na-K transport is inhibited  

    • B. 

      Will increase when active Na-K transport is inhibited  

    • C. 

      Nothing will happen when Na-K transport is inhibited 

    • D. 

      Non of the above

  • 12. 
    A man drinks 2L of iso-tonic fluid these two liters will cause: 
    • A. 

      Decrease in ECF volume

    • B. 

      Increase in ECF volume

    • C. 

      Increase in ICF volume

    • D. 

      Decrease in ICF volume 

  • 13. 
    Extrusion of big materials to the exterior of the cell through the plasma membrane is called: 
    • A. 

      Exocytosis

    • B. 

      Endocytosis

    • C. 

      Pinocytosis

    • D. 

      All of the above

  • 14. 
    When you measured the efficiency of Negative feedback of one of the control systems, you got that the control system corrects 90% of the changes, that means the gain equals: 
    • A. 

      10/1

    • B. 

      20/2

    • C. 

      27/3

    • D. 

      2 answers are correct

  • 15. 
     If there is an increase in the neutrophils , this means the body has: 
    • A. 

      Bacterial infection

    • B. 

      Parasitic infection

    • C. 

      Allergy

    • D. 

      All of the above

  • 16. 
    The life span of RBCs is: 
    • A. 

      120 days

    • B. 

      Hours

    • C. 

      120 hours

    • D. 

      80 days

  • 17. 
    Which of the following statements is incorrect : 
    • A. 

      Vitamin B12 deficiency will lead to megaloblastic anemia.

    • B. 

      Folic acid deficiency will lead to megaloblastic anaemia

    • C. 

      Iron deficiency will lead to macrocytic anemia

    • D. 

      All are correct

  • 18. 
    All of the following proteins are produced in the liver except : 
    • A. 

      Albumin

    • B. 

      Fibrinogen

    • C. 

      Alpha globulin

    • D. 

      Gamma globulin

  • 19. 
    Serum is :
    • A. 

      Normal plasma.

    • B. 

      Plasma with low O2 pressure

    • C. 

      Plasma with low fibrinogen and coagulation factors concentration.

    • D. 

      Plasma with low albumin.

  • 20. 
    When k+ channels open............ Happens:
    • A. 

      Action potential

    • B. 

      Depolarization

    • C. 

      Repolarization

    • D. 

      Resting membrane potential

  • 21. 
    If membrane potential changed from +30 Mv to -120 Mv (resting membrane potential = -90 Mv) we will have: 
    • A. 

      Repolarization

    • B. 

      Depolarization

    • C. 

      Action potential

    • D. 

      Hyperpolrization

  • 22. 
    1. Which of the following ions will increase inside the skeletal muscles during contraction: 
    • A. 

      Na+

    • B. 

      K+

    • C. 

      Ca+2

    • D. 

      Cl-

  • 23. 
      Which of the following neurotransmitter will be released at neuromuscular junction: 
    • A. 

      Acetylcholine

    • B. 

      Glutamate

    • C. 

      Adrenaline

    • D. 

      Nor-adrenaline

  • 24. 
    Which of the following is not a step in the neuromuscular transmission : 
    • A. 

      Calcium ions influx to the Presynaptic neuron.

    • B. 

      Neurotransmitter release to the synaptic cleft.

    • C. 

      Increase Na-K pump activity.

    • D. 

      Release of calcium ions from sarcoplasmic reticulum to sarcoplasm.

  • 25. 
    When a stimulate is applied to a nerve cell it :  
    • A. 

      Open sodium voltage channels.

    • B. 

      Activates calcium inward current .

    • C. 

      Change the membrane permeability to ions.

    • D. 

      Opens chloride voltage influx.