Nov 9, 2025
The Scientific Research Notes of S. Sunkavally (years:2002-2011).
4400-4403.
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The Scientific Research Notes of S. Sunkavally (years:2002-2011).
4400-4403.
Some Adrenal Cortex info for ya
The Scientific Research Notes Of S. Sunkavally (years: 2002-2011).
664-667.
TSRNOSS, p454.
Considered Adrenal Cortex
Sammy and Daddy huddled in bed, When we’d rather hit the discotheques. But alas, what are you going to do, While surviving the icy polar vortex. 02/10/2019
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Adrenal Gland - Adrenal Cortex
Adrenal Gland – Adrenal Cortex
ADRENAL GLAND It occurs in pairs, just above the kidney on either side of the spinal column. It consists of 2 parts: Outer Adrenal cortex Inner Adrenal medulla. Present outer to the cortex is a fibrous capsule. ADRENAL CORTEX: It is formed from embryonal mesoderm. Adrenal cortex produces corticosteroids/ corticoids. They are modifications of cholesterol. Corticotrophin-releasing hormone of…
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Adrenal Gland - Adrenal Cortex
ADRENAL GLAND
It occurs in pairs, just above the kidney on either side of the spinal column.
It consists of 2 parts:
Outer Adrenal cortex
Inner Adrenal medulla.
Present outer to the cortex is a fibrous capsule.
ADRENAL CORTEX:
It is formed from embryonal mesoderm.
Adrenal cortex produces corticosteroids/ corticoids. They are modifications of cholesterol.
Corticotrophin-releasing hormone of Hypothalamus stimulates anterior Pituitary to secrete Adrenocorticotrophic hormone (ACTH). ACTH then stimulates Adrenal cortex to secrete Corticosteroids
Adrenal cortex consists of 3 layers:
Outer Zona Glomerulosa
Middle Zona Fasiculata
Inner Zona Reticularis
Hormones secreted by Adrenal Cortex:
MINERALOCORTICOIDS: secreted by Zona Glomerulosa.
Target cells: Kidney cells.
Its main hormone is ALDOSTERONE ( salt balancing hormone).
It regulates electrolyte-water balance. It acts on Distal Convoluted Tubules & Collecting Ducts of Kidney, activating Na+K+pump. Causes reabsorption of Na & excretion of K. Due to this water enters by osmosis, increasing the blood volume.
It helps in maintenance of electrolyte, body fluid volume, the osmotic pressure of blood & blood pressure.
Hyposecretion causes loss of Na, Cl & water by urine and increases K in blood, thus reducing blood pressure (Hypotension)
Hypersecretion causes high blood pressure (Hypertension), nervous & muscular weakness.
GLUCOCORTICOIDS: secreted by Zona Fasciculata.
Target cells: Liver cells.
Its main hormone is CORTISOL.
It causes the liver to synthesize carbohydrate from non-carbohydrate precursors like amino acids & glycerol (Gluconeogenesis). Increasing glucose level in blood – so it’s a Hyperglycemic hormone.
Causes Proteolysis – breakdown of proteins & stimulates an increase of amino acids in the blood.
Causes Lipolysis – breakdown of fats in adipose tissue. Releases fatty acid in the blood.
Has anti-insulin effect.
Anti-inflammatory: it helps in reducing pain by preventing the phagocytic action of WBC. Hence used for persons suffering from Oedema, Arthritis, Rheumatism.
Immuno-suppressive: checks immune reactions by antibodies. It suppresses synthesis of antibodies. Hence used in the treatment of allergies and also in organ transplant.
Maintains cardiovascular system as well as kidney function.
Stimulates RBC production.
Stress hormone: as it has the capability to cope stress.
GONADOCORTICOIDS/ SEX HORMONES: secreted by Zona Reticularis.
Target cells: Gonads.
Similar to sex hormones of gonads.
Produced in very small amounts.
Male hormone is ANDROGEN & female hormone is OESTROGEN.
They cause the development of secondary sexual characters.
Disorders of adrenal cortex:
Addison’s disease:
Occurs due to deficiency of Aldosterone & Cortisol.
It causes low BP, low blood sugar, low Na, high K, nausea, vomiting, & diarrhea.
Cushing’s disease:
Occurs due to excess of Cortisol.
It causes high blood sugar, high BP, the appearance of sugar in urine, rise in Na & fall in K in plasma.
Endocrine System Mnemonic
Endocrine System: Pituitary gland: Anterior Pituitary: “FLAT PiG” FSH: Follicle stimulating hormone LH: Luteinizing hormone. ACTH: Adrenocorticotropin hormone. TSH: Thyroid stimulating hormone. Prolactin. GH: Growth hormone. Posterior Pituitary: ADH & Oxytocin ADH: Anti-diuretic hormone (Vasopressin). Intermediate lobe: MSH (Melanocyte stimulating hormone). All pituitary gland hormones…
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