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31 Cards in this Set

  • Front
  • Back

Functions of the adrenal cortex

Secretes hormones made from cholesterol; called corticosteroids or corticosteroids.

Mineralcorticoids (ZG)

From the zona glomerulosa (superficial layer) regulate Na+ and K+ balance.


1) Example: aldosterone **Regulate Na & K

Glucocorticoids (ZF)

From the zona fasciculata (middle layer) regulate glucose metabolism. 1) example: cortisol

Adrenal androgens (ZR)

From the zona reticularis are weak sex hormones that supplement those made in the gonads. Ex: DHEA

Zona glomerulosa (adrenal cortex)

Most superficial layer= Mineral

Zona fasciculata (adrenal cortex)

Middle layer=sugar

Zona reticularis (adrenal cortex)

Deepest layer= Sex

Aldosterone

⬆️ Na+ ⬆️ water = hypertonic solution


i.e. blood pressure HTN (hypertension)

What is a aldosterone blocker?

****ACE inhibitors = pril (ending) Na channel blockers

What is the job of cortisol?

Regulating the glucose of the blood


anti-inflammatory

Stress increases secretion of ____, which results in increased______release.

ACTH ; glucocorticoids

What is the stress hormones?

Glucocorticoids, epinephrine, and CRH.

General adaptation syndrome (GAS)

1) good for papa recovery after stress such as an illness or trauma.


2) cortisol helps inhibit the immune system so it does not over respond.

Thyroid gland structure is located where and has how many lobes?

1) located just below the larynx


2) has two lobes on either side of the trachea connected by the isthmus.

How does the body increase (TH) thyroid hormone

Using negative feedback


TH controls


TRH =>TSH


Thyroid home (Pregnant mother w/ Thyroid issues)

3-4 weeks


The baby will also have issues and it will result in lower IQ for baby.


Folic acid and TH medications

Parathyroid glands

*despite location they have nothing to do with the thyroid


*Secrete parathyroid hormone (PTH)


*Hormone promotes rise in blood Ca+ by acting on Bones, kidneys, and intestines.


Antogonist=> calcitonin

Diabetes mellitus type 1 (DMI)

Not enough insulin


Usually starts at a younger age


Treatment: provide insulin

Pathway when there's a ⬇️ in blood Ca+ levels

1. Detected by the parathyroid gland


2. Parathyroid hormone (PTH) is secreted into the bloodstream.


3. Target organs that respond to PTH, or its effects;


• Osteoclast reabsorb bone tissue


• Kidney retains CA and promotes activation of inactive form of vitamin d to calcitriol, an active form of vitamin d.


• Small intestine increases absorption of more CA under the influence of calcitriol


4. Raising Ca+ release in blood inhibits PTH

Where is the pancreas located?

Posterior to the stomach

Pancreas

Endocrine and an exocrine gland (Mixed gland)

Endocrine cells (pancreas)

Cells are located in pancreatic islets (islets of Langerhans)


a. Alpha cells: glucagon


b. Beta cells: insulin= ⬇️ glucose

Glucose channels / carriers

Glucose transfer (GLUT4)

Diabetes mellitus 2 (DMII)

Not enough receptors


Usually starts at a later age


Treatment: diet, insulin, medication

Pineal gland

Secretes the hormone melatonin


Part of the regulation of the circadian rhythms

Gastrointestinal tract (endocrine glands)

Several hormones are made in the stomach and small intestine to regulate digestive process; includes


Gastrin, secretin, cholecystokinin


(Going into the blood but are regulating the function of the same system)

Gonads (endocrine glands)

Produce testosterone, estrogen, and progesterone to regulate production of gametes and secondary sexual characteristics.

Placenta (endocrine glands)

Produces human chorionic gonadotropin (HCG) and samatomammotropin to regulate pregnancy.

Autocrine vs paracrine signals

Both are involved in short range signaling between neighboring cells within an organ

Autocrine signals

The sender and receiver are the same cell type

Paracrine signals

The sender and receiver are different cell types/tissues.