00
Correct
00
Incorrect
00 : 00 : 00
Session Time
00 : 00
Average Question Time ( Secs)
Retry this test Dashboard

  • Question 1 - The process by which DNA fragments are separated by gel and transferred onto...

    Correct

    • The process by which DNA fragments are separated by gel and transferred onto a membrane sheet is called:

      Your Answer: Southern blotting

      Explanation:

      A Southern blot is a method used in molecular biology for detection of a specific DNA sequence in DNA samples. Southern blotting combines transfer of electrophoresis-separated DNA fragments to a filter membrane and subsequent fragment detection by probe hybridization. The other forms of blotting involve the use of RNA and proteins.

    • This question is part of the following fields:

      • Genetics
      • Physiology
      6.3
      Seconds

  • Question 2 - Neurons that are inactive during quiet breathing, become active when the respiratory drive...

    Incorrect

    • Neurons that are inactive during quiet breathing, become active when the respiratory drive for increased ventilation becomes greater than normal. These are located in the:

      Your Answer: Dorsal respiratory group

      Correct Answer: Ventral respiratory group

      Explanation:

      The mechanism of control of ventilation is an interplay of multiple regions in the brain. Medullary respiratory centre sets the basic rhythm of breathing. The dorsal respiratory group integrates input from the stretch receptors and the chemoreceptors in the periphery and is composed mainly of inspiratory neurons which controls the basic rhythm of breathing. The ventral respiratory group generates breathing rhythm and integrates data coming in to the medulla. It contains both inspiratory and expiratory neurons. They are primarily active in exercise and stress.

    • This question is part of the following fields:

      • Physiology
      • Respiratory
      11
      Seconds

  • Question 3 - With regard to X linked disorders which of the following are true ...

    Incorrect

    • With regard to X linked disorders which of the following are true

      Your Answer: They are relatively common but their expression is variable

      Correct Answer: X linked recessive disorders usually present in males and only very rarely present in homozygous females

      Explanation:

      All are true for autosomal recessive disorders. Dominance rules for sex-linked gene loci are determined by their behaviour in the female: because the male has only one allele (except in the case of certain types of Y chromosome aneuploidy), that allele is always expressed regardless of whether it is dominant or recessive.

    • This question is part of the following fields:

      • Genetics
      • Physiology
      18.6
      Seconds

  • Question 4 - Anti-gastroesophageal reflux mechanisms include the following except: ...

    Correct

    • Anti-gastroesophageal reflux mechanisms include the following except:

      Your Answer: Peristaltic movements of the oesophagus

      Explanation:

      The lower oesophageal sphincter contracts preventing reflux of acid into the oesophagus. The sling muscles of the stomach, the crura of the diaphragm and the phreno-oesophageal ligament all play an important role in constricting the lower portion of the oesophagus and preventing reflux. Peristaltic movements do not stop the acid reflux.

    • This question is part of the following fields:

      • Gastrointestinal
      • Physiology
      14.2
      Seconds

  • Question 5 - Where does the anterior pituitary receive most of its blood supply? ...

    Incorrect

    • Where does the anterior pituitary receive most of its blood supply?

      Your Answer: Medial mammillary nucleus

      Correct Answer: Portal hypophysial vessels

      Explanation:

      The anterior pituitary receives its arterial supply from the superior hypophyseal artery, which is a branch of the internal carotid that forms a capillary around the hypothalamus; thus forming the hypothalamo-hypophysial portal system.

    • This question is part of the following fields:

      • Endocrinology
      • Physiology
      5.5
      Seconds

  • Question 6 - Which cell type functions as the critical bridge between innate and adaptive immune...

    Correct

    • Which cell type functions as the critical bridge between innate and adaptive immune systems, by activating naïve T lymphocytes?

      Your Answer: Dendritic cells

      Explanation:

      Dendritic cells are antigen presenting cells. They express class II MHC and T cell co-stimulatory molecules. They bind antigens and present them to native T cells and in the process activate the specific T cell against that antigen.

    • This question is part of the following fields:

      • Immunology
      • Physiology
      11
      Seconds

  • Question 7 - The effects of β1 stimulation include the following ...

    Incorrect

    • The effects of β1 stimulation include the following

      Your Answer: Dephosphorylation of l type Ca++ channel s

      Correct Answer: Increased strength of contraction

      Explanation:

      β1 stimulation include the phosphorylation of L type Ca++ channels and phospholamban and increased Ca++ influx from myocytes.

    • This question is part of the following fields:

      • Cardiovascular
      • Physiology
      5.8
      Seconds

  • Question 8 - Endolymph in the inner ear is rich in: ...

    Correct

    • Endolymph in the inner ear is rich in:

      Your Answer: K

      Explanation:

      Cochlear fluids namely endolymph and perilymph have different compositions. Perilymph is a typical extracellular fluid, with ionic composition comparable to plasma or cerebrospinal fluid. The main cation is sodium. Endolymph is a totally unique extracellular fluid, with an ion composition unlike that which is found anywhere else in the body. The major cation in the endolymph is potassium and there is virtually no sodium.

    • This question is part of the following fields:

      • Neurology
      • Physiology
      4.9
      Seconds

  • Question 9 - In the jugular venous pressure wave… ...

    Incorrect

    • In the jugular venous pressure wave…

      Your Answer: Consists of 3 troughs and 3 peaks

      Correct Answer: Consists of 3 peaks and 2 troughs

      Explanation:

      The jugular venous pressure (JVP, sometimes referred to as jugular venous pulse) is the indirectly observed pressure over the venous system via visualization of the internal jugular vein. It can be useful in the differentiation of different forms of heart and lung disease. Classically three upward deflections (peaks) and two downward deflections (troughs) have been described:The upward deflections are the a (atrial contraction), c (ventricular contraction and resulting bulging of tricuspid into the right atrium during isovolumetric systole) and v = venous filling.The downward deflections of the wave are the x (the atrium relaxes and the tricuspid valve moves downward) and the y descent (filling of ventricle after tricuspid opening).

    • This question is part of the following fields:

      • Cardiovascular
      • Physiology
      6.3
      Seconds

  • Question 10 - The brainstem contains which of the following structures? ...

    Incorrect

    • The brainstem contains which of the following structures?

      Your Answer: The midbrain, pons, medulla and cerebellum

      Correct Answer: The midbrain, pons and medulla

      Explanation:

      Brain stem is the base of the brain that connects the brain to the spinal cord. It consists of the mid brain, pons and medulla oblongata.

    • This question is part of the following fields:

      • Neurology
      • Physiology
      6.9
      Seconds

SESSION STATS - PERFORMANCE PER SPECIALTY

Genetics (1/2) 50%
Physiology (4/10) 40%
Respiratory (0/1) 0%
Gastrointestinal (1/1) 100%
Endocrinology (0/1) 0%
Immunology (1/1) 100%
Cardiovascular (0/2) 0%
Neurology (1/2) 50%
Passmed
Retry this test Dashboard