Endocrine System - Final Exam Flashcards
Endocrine effect
Hormones that are released into circulation and act on distant organs
Growth hormone
Tissue growth
Thyroid stimulating hormone
For thyroid to release thyroid homrone
ACTH
Acts on adrenal gland to make cortical homrones
FSH
Acts on testes and ovary
(Sperm, testosterone)
(Ova, estrogen, progesterone)
LH
Acts on testes and ovary
(Sperm, testosterone)
(Ova, estrogen, progesterone)
PRL
Acts on breast glandular tissue
Oxytocin
Lactation
Uterine contraction
ADH
Kidney
Water reabsorption
Major diseases of endocrine system classifications (3)
- Hyperfunction
- Hypofunction
- Tumours
Hyposecretion of hormones (3)
- Agenesis
- Atrophy
- Destruction
Hypersecretion of hormones (2)
- Tumour
2. Hyperplasia
Pituitary diseases (3)
- Pituitary hyperfunction
- Pituitary hypofunction
- Localized mass (causing compression of optic chiasm and basal portion of brain)
Pituitary tumours (4)
- Prolactinoma
- Somatotropic ademona
- Corticotropic ademona
- Non-functioning tumours
Prolactimona
Amenorrhea and galactorrhea
Somatotropic ademona
Acromegaly (post-pubertal patient)
or
Gigantism (prepubertal patient)
Corticotropic adenoma
Cushing disease
Causes of pituitary hypofunction (3)
- Acute postpartum pituitary insufficiency
- Tumours that compress the pituitary
- Trauma to base of skull or intracranial surgery
Acute postpartum pituitary insufficiency
Sheehan’s syndrome
Due to ischemia related post-partum pituitary necrosis
Panhypopituitarism
Decreased production of all pituitary hormones
General weakness, cold intolerance, poor appetite, weight loss, hypotension
Diseases of posterior pituitary (1)
- Diabetes insipidus
Diabetes insipidus
Lack of antidiuretic hormone
Polyuria (hypotonic urine)
Causes of diseases of posterior pituitary (4)
- Tumours
- Infections of brain or meninges
- intracranial hemorrhage
- Trauma or bones at base of skull or transection of pituitary stalk
Thyroid disease (4)
- Hyperthyroidism
- Hypothyroidism
- Goiter
- Thyroid tumours
Hyperthyroidism
Excess of free thyroid hormones in blood More often seen in women Thyroid is warm, nodular, diffusely enlarged Hyperactive Diarrhea Warm/sweaty skin Restlessness Nervousness Emotional lability Muscle trmous Tachycardia Weightloss
Causes of hyperthyroidism (5)
- Grave’s disease
- Idiopathic nodular hyperplasia
- Adenoma
- Exogenous thyroid (ingestion)
- Medication
Grave’s disease
Autoantibodies to TSH receptor on surface of thyroid follicle cells
Usual clinical features of hyperthyroidism + exophthalmos and pretibial edema
Exophthalmos
Bulging eyes