Showing posts with label mnemonics. Show all posts
Showing posts with label mnemonics. Show all posts

Sunday, July 2, 2017

-Mendel’s principles of inheritance.

 

Mendel’s principles of inheritance: U.S.A

Law of dominance
"uniformity"

Some alleles are dominant while others are recessive; an organism with at least one dominant allele will display the effect of the dominant allele.

Law of segregation

During gamete formation, the alleles for each gene segregate from each other so that each gamete carries only one allele (heterozygous) for each gene.

Law of independent assortment

Genes for different traits can segregate independently during the formation of gametes.

In reality, this is not always true, as genes that are close together on the same chromosome tend to be inherited together, i.e. they are 'linked’.

Monday, March 14, 2016

- histamine releasers.

 drugs causing histamine release
(histamine releasers)

"Moon Try To Do Rays"

Morphine
Trimetaphan
Tubocurarine
Deferoxamine
Radiocontrast media.

 Dr Ibrahim samaha





Tuesday, August 23, 2011

- Eye signs of thyrotoxicosis.

Eye signs of thyrotoxicosis.
"DR Joffroy may validate symptoms"

  • Dalrymple sign:- rim of sclera is seen all around the cornea, on looking straight forward.
  • Rosenbach's sign:- fine tremor of the upper eyelids on slight closure of the eye.
  • Joffroy's sign:-lack of wrinkling of the forehead when a patient looks upward.
  • Moebius sign:- lack of convergence on looking to near object.
  • Von Graefe's sign (lid lag sign):-lagging of the upper eyelid on looking downward without movinh the head.
  • Stellwag's sign:-staring look with infrequent blinking.
Dr Ibrahim,,

Sunday, August 7, 2011

- Causes of gynecomastia.

Causes of gynecomastia.
Gynecomastia.
  • Genetic : klinefelter syndrome.
  • Young boy (puberty): due to transient increase of plasma estradiol.
  • Neonate: due to persistent maternal or placental lactogens.
  • Estrogen and estrogen like drugs (e.g. digitalis).
  • Cirrohosis,Cimetidine,Cytotoxic drugs.
  • Old age(due to conversion of androgen to estrogen in extra glandular tissue),Overactive thyroid (Hyperthyroidism)
  • Myxedema,Marijuana.
  • Acromrgally.
  • Spironolactone,Steroids.
  • Tumour (e.g. testis,adrenal,bronchogenic carcinoma).
  • INH,Iron deposition in testis.
  • Alcoholism.