Physiology MCQ Exam! Beginners Level Trivia Quiz

42 Questions | Total Attempts: 150

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Physiology Quizzes & Trivia

As we continue with our revision journey heading to the MCQ finals physiology the quiz below is the Exam prep 2 in the series of tests. Do you feel like you can tackle it? Why don’t you give it a try and be sure to come back for the third exam in the series? All the best as you keep revising for your finals.


Questions and Answers
  • 1. 
    The large onion-shaped receptors that are found deep in the dermis and in subcutaneous tissue and that respond to deep pressure are
    • A. 

      Merkel discs

    • B. 

      Pacinian receptors

    • C. 

      Free nerve endings

    • D. 

      Ruffini's corpuscle

  • 2. 
    Gustatory cells are stimulated by
    • A. 

      Movement of otoliths

    • B. 

      Stretch

    • C. 

      Substances in solution

    • D. 

      Photons of light

  • 3. 
    Increases in volume are perceived when
    • A. 

      The basilar membrane vibrates more intensely

    • B. 

      Action potentials from hair cells are blocked

    • C. 

      Sound wave amplitude decreases

    • D. 

      Sound wave frequency decreases

  • 4. 
    Sensations of gravity and linear acceleration are registered in the __________.
    • A. 

      Semicircular canals

    • B. 

      Ossicles

    • C. 

      Saccule and utricle

    • D. 

      Organ of Corti

  • 5. 
    The portion of the fibrous tunic that is white and opaque is the
    • A. 

      Choroid

    • B. 

      Cornea

    • C. 

      Sclera

    • D. 

      Retina

  • 6. 
    The age-associated changes that result in loss of accommodation of the eyes is called
    • A. 

      Myopia.

    • B. 

      Hyperopia.

    • C. 

      Presbyopia.

    • D. 

      Retinopia.

  • 7. 
    Of the neurons in the retina, the axons of which form the optic nerve?
    • A. 

      Bipolar neurons

    • B. 

      Ganglion cells

    • C. 

      Cones

    • D. 

      Rods

  • 8. 
    Put these structures of the visual system in the order that they transmit light or information. 1.optic disk 2.lens 3.cornea 4.visual cortex of the occipital lobe 5.rods 6.optic chiasm 7.lateral geniculate body of the thalamus
    • A. 

      2-3-1-5-7-6-4

    • B. 

      3-2-5-1-6-7-4

    • C. 

      5-3-1-2-6-7-4

    • D. 

      3-2-1-5-7-6-4

  • 9. 
    As opposed to rods, the cones
    • A. 

      Are less sensitive in low light conditions

    • B. 

      Provide colour vision

    • C. 

      Provide greater visual acuity (sharpness of detail)

    • D. 

      Are more responsive in the daylight

    • E. 

      All of these correctly describe cones.

  • 10. 
    Hormones may:
    • A. 

      Alter the activity of an enzyme

    • B. 

      Alter the rate of synthesis of an enzyme

    • C. 

      Alter the permeability of cell membranes

    • D. 

      All of the above are correct

  • 11. 
    The steroid hormones
    • A. 

      Are derived from cholesterol

    • B. 

      Are lipid molecules

    • C. 

      Are not water soluble

    • D. 

      Include the sex hormones and corticosteroids

    • E. 

      All of these describe steroid hormones.

  • 12. 
    The hormones that contain the element iodine are
    • A. 

      Triiodothyronine (T3) and tetraiodothyronine (T4)

    • B. 

      Catecholamines (epinephrine and norepinephrine)

    • C. 

      Sex steroids

    • D. 

      Corticosteroids

  • 13. 
    Which of these events is NOT a part of steroid hormone action?
    • A. 

      Binding to an intracellular carrier protein

    • B. 

      Initiation of gene transcription

    • C. 

      Dimerisation of receptors

    • D. 

      Binding to a hormone response element

  • 14. 
    Steroid hormones
    • A. 

      Bind to membrane receptors.

    • B. 

      Diffuse easily through the plasma membrane.

    • C. 

      Act by activating cAMP.

    • D. 

      Are inactivated by second messengers.

  • 15. 
    Which of the following is not correct about a second messenger system?
    • A. 

      The activating hormone interacts with a receptor site on the plasma membrane

    • B. 

      The activating hormone activates an enzyme, most often adenylate cyclase

    • C. 

      Activated adenylate cyclase catalyses the transformation of AMP to cyclic AMP

    • D. 

      Cyclic AMP causes the activation of protein kinase

  • 16. 
    The hypothalamohypophyseal portal system carries hormones from the
    • A. 

      Anterior pituitary to the hypothalamus.

    • B. 

      Posterior pituitary to the hypothalamus.

    • C. 

      Hypothalamus to the anterior pituitary.

    • D. 

      Hypothalamus to the posterior pituitary.

  • 17. 
    The pituitary hormone associated with dwarfism, gigantism, pituitary cachexia, and acromegaly is
    • A. 

      FSH

    • B. 

      GH

    • C. 

      ACTH

    • D. 

      TSH

  • 18. 
    The supraoptic nuclei and paraventricular nuclei are clusters of neuron cell bodies located in the hypothalamus, responsible for secreting the hormones
    • A. 

      LH and FSH

    • B. 

      GH and ACTH

    • C. 

      TSH and prolactin

    • D. 

      Oxytocin and ADH

  • 19. 
    The two inhibiting hormones from the hypothalamus are
    • A. 

      GnRH and dopamine

    • B. 

      TRH and CRH

    • C. 

      GnRH and GHRH

    • D. 

      Dopamine and somatostatin

  • 20. 
    Which hormones are not secreted by the adrenal cortex?
    • A. 

      Aldosterone and other mineralocorticoids

    • B. 

      Sex steroids: weak androgens and some estrogens

    • C. 

      Cortisol and other glucocorticoids

    • D. 

      Adrenaline and some noradrenaline

  • 21. 
    Which of the following would most likely occur if the thyroid gland was removed?
    • A. 

      Increased calcitonin secretion

    • B. 

      Increased thyroid hormone production

    • C. 

      Increased TSH production

    • D. 

      Increased serum potassium levels

  • 22. 
    The hormone, insulin
    • A. 

      Is secreted by the alpha cells of the pancreas

    • B. 

      Promotes the entry of glucose and amino acids into tissue cells

    • C. 

      Promotes the breakdown of glycogen (glycogenolysis) and fat (lipolysis)

    • D. 

      Levels fall immediately after a meal is eaten

  • 23. 
    Paracrine secretion:
    • A. 

      Involves substances bound to carrier proteins in the blood

    • B. 

      Involves the secretion of a substance to act locally without entering the circulation

    • C. 

      Involves secretion via ducts into the lumen of the gastrointestinal tract

    • D. 

      Never occurs in a normal healthy organism

  • 24. 
    This structure is composed of protein filaments and is located in the center of the thick filaments.
    • A. 

      Z line

    • B. 

      Titin

    • C. 

      M line

    • D. 

      Actin

  • 25. 
    This structure runs the length of the sarcomere through the thick filaments and contributes to the elastic recoil in muscle.
    • A. 

      Z line

    • B. 

      Titin

    • C. 

      M line

    • D. 

      Actin

  • 26. 
    Which of these processes could NOT be responsible for an increase in the force of contraction of a whole muscle?
    • A. 

      Treppe

    • B. 

      Recruitment of motor units

    • C. 

      Multiple wave summation

    • D. 

      Inhibition of acetylcholinesterase

  • 27. 
    Movement in the sagittal plane includes:
    • A. 

      Abduction

    • B. 

      Elevation

    • C. 

      Inversion

    • D. 

      Flexion

  • 28. 
    Muscles which move a limb toward the midline of the body are termed
    • A. 

      Abducters

    • B. 

      Adducters

    • C. 

      Extensors

    • D. 

      Flexors

  • 29. 
    An increase in muscle tension due to a gradual increase in stimulus intensity is termed
    • A. 

      Incomplete tetanus

    • B. 

      Complete tetanus

    • C. 

      Treppe

    • D. 

      Fatigue

  • 30. 
    Which of the following statements about muscles is FALSE?
    • A. 

      During isometric contractions muscles do not generate tension.

    • B. 

      The strength of contraction is directly proportional to the stimulus intensity.

    • C. 

      Tendons act as part of the series-elastic component of a muscle.

    • D. 

      During muscle contraction the Z lines move closer together.

  • 31. 
    During skeletal muscle contraction
    • A. 

      The H zone increases in size.

    • B. 

      Ca2+ associates with tropomyosin.

    • C. 

      Myosin heads interact with tropomyosin.

    • D. 

      Thin filaments slide across thick filaments.

  • 32. 
    The Ca2+ required for skeletal muscle contraction
    • A. 

      Is released from the sarcoplasmic reticulum.

    • B. 

      Enters the cell due to the opening of voltage regulated Ca2+ channels.

    • C. 

      Is actively transported into the cell.

    • D. 

      Is released from mitochondria.

  • 33. 
    Regarding excitation contraction coupling
    • A. 

      The terminal cisternae transmit the action potential to the sarcoplasmic reticulum.

    • B. 

      Acetylcholine binds to nicotinic receptors to initiate muscle cell depolarization.

    • C. 

      The process can be blocked by muscarinic antagonists.

    • D. 

      Ca2+ is released from the transverse tubules to initiate contraction.

  • 34. 
    Ca2+ binds to
    • A. 

      Actin

    • B. 

      Myosin

    • C. 

      Tropomyosin

    • D. 

      Troponin

  • 35. 
    In regards to the relationship between resting muscle fiber length and tension generated
    • A. 

      Maximal tension is generated when the thick and thin filaments slightly overlap.

    • B. 

      Maximal tension is generated when the thick and thin filaments do not overlap.

    • C. 

      Maximal tension is generated when the thick and thin filaments fully overlap.

    • D. 

      The amount of overlap is unimportant in determining maximal tension.

  • 36. 
    Blood lactate will begin to rise when exercise is performed at a rate that is
    • A. 

      15 % of VO2max.

    • B. 

      25% of VO2max.

    • C. 

      50% of VO2max.

    • D. 

      85% of VO2max.

  • 37. 
    Fatty acids provide the majority of the energy for muscle metabolism when a person is
    • A. 

      Exercising at 25% of VO2max.

    • B. 

      Exercising at 50% of VO2max.

    • C. 

      Exercising at 75% of VO2max.

    • D. 

      Exercising at 100% of VO2max.

  • 38. 
    Which of the following factors may be involved in causing muscle fatigue?
    • A. 

      Decreased H+ concentration.

    • B. 

      Increased glycogen.

    • C. 

      Increased lactate formation.

    • D. 

      All of the above.

  • 39. 
    Endurance training results in increased
    • A. 

      Muscle mitochondria number.

    • B. 

      Glycogen depletion during exercise.

    • C. 

      Number of type IIB fibers.

    • D. 

      Lactate production per unit time.

  • 40. 
    Which of the following statements regarding cardiac muscle is TRUE?
    • A. 

      Dense bodies anchor thin filaments.

    • B. 

      Fibers lack I and A bands.

    • C. 

      Intercalated discs contain gap junctions.

    • D. 

      Fibers lack branches.

  • 41. 
    Smooth muscle cells
    • A. 

      Contain intercalated discs.

    • B. 

      Contain A and I bands.

    • C. 

      Are innervated by somatic nerves.

    • D. 

      May contain gap junctions.

  • 42. 
    A muscle contraction against a resistance that is greater than the force and causes muscle lengthening is a(n)
    • A. 

      Concentric contraction.

    • B. 

      Isometric contraction.

    • C. 

      Eccentric contraction.

    • D. 

      Isokinetic contraction.