Applied basic sciences MCQS

Discussion in 'MRCS Forum' started by sarahkhan, Jul 27, 2004.

  1. sarahkhan

    sarahkhan Guest

    DEAR ALL,

    I AM POSTING SOME OF THE MCQS WHICH CAME IN IRELAND APPLIED BASIC SCIENCES EXAM OF PHYSIOLOGY.....HOPE THEY HELP....THE PATTERN OF THE NEW EXAM WOULD BE SIMILAR TO THIS IF NOT IDENTICAL.......

    Q1.OXYTOCIN

    A.IS SYNTHESIZED IN THE SUPRAOPTIC NUCLEUS OF THE HYPOTHALAMUS-----TRUE

    B.CAUSES MILK EJECTION----TRUE

    C.RELAXES THE UTERUS----FALSE

    D.IS A LARGE POLYPEPTIDE----FALSE

    E.IS RELEASED DIRECTLY INTO THE CIRCULATION FROM ITS SITE OF PRODUCTION----FALSE



    Q2.BONE

    A.OWES ITS STRENGTH TO THE MINERAL HYDROXYAPATITE---TRUE

    B.IS A LIVING TISSUE---TRUE

    C.SURFACES ARE MAINLY LINED BY OSTEOBLASTS----TRUE

    D.GROWTH IN LENGTH IN LONG BONES OCCURS BY THE GROWTH OF THE EPIPHYSEAL CARTILAGE----TRUE

    E.HAS A GREAT CAPACITY FOR REMODELLING----TRUE



    Q3.PLASMA PROTEINS

    A.HAVE A HIGH MOLECULAR WEIGHT------TRUE

    B.ARE SYNTHESIZED ONLY IN THE LIVER----FALSE

    C.ARE RESPONSIBLE FOR THE RELATIVELY HIGH VISCOSITY OF PLASMA---TRUE

    D.ARE INVOLVED IN THE TRANSPORT OF HORMONES---TRUE

    E.PLAY A ROLE IN THE BUFFERING OF BLOOD---TRUE



    Q4.IN THE CONTROL OF URINARY BLADDER FUNCTION

    A.THE PUDENDAL NERVES INNERVATE THE EXTERNAL URETHRAL SPHINCTER---TRUE

    B.THE INTERNAL URETHRAL SPHINCTER IS UNDER VOLUNTARY CONTROL---FALSE

    C.STIMULATION OF THE PELVIC SPLANCHNIC NERVES (NERVI ERIGENTES)CAUSES CONTRACTION OF THE BLADDER---TRUE

    D.MICTURITION REFLEXES ARE INITIATED AT BLADDER VOLUMES OF BETWEEN 20 AND 50 ML---FALSE

    E.MICTURITION REFLEXES ARE ABOLISHED BY CUTTING THE LUMBAR AND SACRAL DORSAL ROOTS----TRUE



    Q5.THE CITRIC ACID CYCLE

    A.IS ALSO KNOWN AS KREBS CYCLE---TRUE

    B.IS A SEQUENCE OF REACTIONS IN WHICH ACETYL CO A IS METABOLIZED TO CO2 AND H ATOMS----TRUE

    C.IS THE COMMON PATHWAY FOR THE OXIDATION TO CO2 AND H2O FOR CARBOHYDRATE----TRUE

    D.IS THE COMMON PATHWAY FOR THE OXIDATION TO CO2 AND H2O FOR ALL AMINO ACIDS----FALSE

    E.DOES NOT REQUIRE OXYGEN---FALSE




    Q6.AT BIRTH

    A.SYSTEMIC VASCULAR RESISTANCE RISES----TRUE

    B.PULMONARY VASCULAR RESISTANCE RISES---FALSE

    C.THERE SI A REVERSAL OF FLOW IN THE DUCTUS ARTERIOSUS----TRUE

    D.THE OPENING BETWEEN THE TWO VENTRICLES CLOSES----FALSE

    E.THE CARDIAC OUTPUT AVERAGES 5 LITRES PER MINUTE---FALSE




    Q7.NERVE IMPULE TRANSMISSION

    A.IN MYELINATED FIBERS IS SLOWER THAN IN UNMYELINATED FIBERS---FALSE

    B.CONDUCTION VELOCITY IS DIRECTLY PROPORTIONAL TO THE DIAMETER OF THE CONDUCTING FIBERS-----TRUE

    C.EXCITATORY NEUROTRANSMITTERS HYPERPOLARIZE THE NERVE CELL MEMBRANE---FALSE

    D.IS SALTATORY IN UNMYELINATED NERVES---FALSE

    E.OPENING OF POTASSIUM CHANNELS RESULTS IN DEPOLARIZATION OF THE NERVE CELL MEMBRANE----FALSE



    Q8.IN THE MENSTRUAL CYCLE

    A.THE FIRST HALF IS TERMED THE PROLIFERATIVE OR THE FOLLICULAR STAGE---TRUE

    B.AFTER OVULATION BOTH OESTROGEN AND PROGESTERONE ARE PRODUCED BY THE OVARY----FALSE

    C.PLASMA OESTROGEN FALLS DURING THE FIRST HALF OF THE CYCLE---FALSE

    D.A RISE IN BODY TEMPERATURE TAKES PLACE AT THE TIME OF THE OVULATION---TRUE

    E.THE LOSS OF MENSTRUAL FLUID IS ABOUT 250 ML---FALSE



    Q9.IN MODERATE EXERCISE

    A.CELLULAR METABOLISM IS MAINLY AEROBIC---TRUE

    B.A METABOLIC ACIDOSIS IS INEVITABLE---FALSE

    C.INSULIN PRODUCTION IS INHIBITED---TRUE

    D.PCO2 OF ARTERIAL BLOOD RISES----FALSE

    E.BLOOD FLOW TO SKELETAL MUSCLE CAN INCREASE TO 20 L/MIN.----TRUE



    Q10.HYPOCAPNIA

    A.DECREASES CEREBRAL BLOOD FLOW----TRUE

    B.SHIFTS THE OXYGEN DISSOCIATION CURVE TO THE RIGHT----FALSE

    C.DECREASES PLASMA IONIZED CALCIUM----TRUE

    D.STIMULATES THE MEDULLARY RESPIRATORY CENTRE----FALSE

    E.CAUSES PERIPHERAL VASODILATATION-----FALSE


    Q11.THE PHYSIOLOGICAL DEAD SPACE

    A.IS INVARIABLY IDENTICAL IN VOLUME TO THE ANATOMICAL DEAD SPACE----FALSE

    B.IS ALSO KNOWN AS THE PHYSIOLOGICAL SHUNT----FALSE

    C.IS ABOUT 20 % OF THE FUNCTIONAL RESIDUAL CAPACITY----FALSE

    D.COMPRISES THE ANATOMICAL DEAD SPACE AND THE ALVEOLAR DEAD SPACE----TRUE

    E.IS GREATER IN THE UPRIGHT POSITION----TRUE


    Q12.THE CAROTID BODY

    A.CONTAINS NUMEROUS SINUSOIDAL CAPILLARIES---TRUE

    B.IS SITUATED AT THE BIFURCATION OF THE COMMON CAROTID ARTERY---TRUE

    C.IS RICHLY SUPPLIED WITH AFFERENT NERVE FIBERS---TRUE

    D.IS MAINLY CONCERNED IN RESPIRATORY REFLEXES---TRUE

    E.CONTAINS NERVE FIBERS SENSITIVE TO ALTERATIONS IN BLOOD PRESSURE---FALSE


    TAKE CARE.
    .
  2. Guest

    Guest Guest

  3. Dr Sajjad

    Dr Sajjad Guest

    thanking you

    Thanks Sara
    You are an angel.

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