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Endocrine System
Endocrine System
64
Biology
Undergraduate 1
02/05/2014

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Term
endocrine system 
Definition
rapid changes and very specific responses to environmental stimuli
Term
Endocrine cells 
Definition
their secretions (hormones) to body fluids (bloodstream)
Term
 Cells
Definition
_______ can respond to several hormones at the same time
Term
Catecholamine 
Definition
(water soluble) including epinephrine and nor-epinephrine are amino acid derivatives
Term
Thyroid hormones 
Definition
(lipid soluble) are amino acid derivatives
Term
Peptide hormones 
Definition
are composed by amino acids
Term

Insulin 

Definition
is a peptide hormone that composed by amino acids
Term
Sex hormones 
Definition
are steroids
Term
Steroid hormones
Definition

a.     Are lipid derivatives

b.     Their structures are similar to cholesterol

c.     Binds with intracellular receptors (nucleus, mitochondria)

 

d.     Gene transcription occurs when binding to receptors

Term
catecholamines
Definition

1)     The hormone works with second messenger is catecholamines. For example: Epinephrine and nor-epinephrine work with second messenger cyclic AMP.

Term
Hormones can change cellular activities by changing ___, ___, and _____ of ENZYMES in a cell
Definition
quantitiesactivities, and identities
Term
G protein 
Definition
links the first messenger (hormones) and second messengers (cyclic AMP, calcium ion)
Term
When enzyme adenyl cyclase is activated, _____; when enzyme PDE is activated, ______
Definition

cAMP is formed

cAMP is broken down

Term

1)     Hormones that control the function of the ANTERIOR pituitary gland (Releasing and Inhibiting hormones RH/IH) are released from the _____.

Definition
MEDIAN EMINENCE of the HYPOTHALAMUS
Term

1)     If median eminence is damaged, no TRH, CRH, GnRH released by the hypothalamus.

a.

b.

c.

 

Definition

a.     No TRH ]  Hypothalamus would no longer be able to control the secretion of thyroid hormones.

b.     No CRH ] Hypothalamus would no longer be able to control the secretion of cortisone.

 

c.     No GnRH ] Hypothalamus would no longer be able to control the secretion of sex hormones

Term
Hormones that control the function of the POSTERIOR pituitary gland are released from the ____ and _____
Definition

SUPRAOPTIC NUCLEI (ADH)

PARAVENTRICULAR NUCLEI (oxytocin) of the HYPOTHALAMUS


Term
The main function of ADH (antiuretic hormone) is to ____
Definition
decrease the amount of water loss at the kidneys. This function is to help to retain water in the body
Term

1)     Anterior pituitary glands releases ____

Definition
7 hormones: TSH, ACTH, FSH, LH, MSH, GH, and PRL (prolactin)
Term
Prolactin hormone is responsible for ___
Definition
milk production
Term
Oxytocin hormone is responsible for ___
Definition
milk ejection and promoting uterine contraction
Term

1)     Growth hormones promotes ____

Definition
bone , muscle growth by increasing the protein uptake by cells, and cause hyperglycemia (diabetic-effect)
Term
Excess secretion of GH prior to puberty will cause 
Definition
gigantism
Term

1)     Excess secretion of GH after puberty will cause ____

Definition
acromegaly
Term
Liver cells respond to GH by ____
Definition

releasing somatomedins or IGF (insulin-like growth factors)


a.     Example: In epithelia and connective tissue, GH stimulates DIVISIONS of stem cell and DIFFERENTIATION of daughter cells. Somatomedins stimulate the growth of these daughter cells)

Term

The anterior hormone that triggers the release of thyroid hormone from the thyroid gland is ____

 

Definition
TSH
Term
The anterior hormone that triggers the release of glucocorticoids from the adrenal cortex is 
Definition
ACTH
Term

 The anterior hormone that promotes egg and sperm is 

Definition
FSH. (follicle stimulating hormone)
Term
The anterior hormone that triggers the release of female and male sex hormones is 
Definition
LH
Term
anterior hormone that stimulates melanocytes to produce pigment melanin is 
Definition
MSH
Term

CALCITONIN is a ____

Definition
hormone of the C cells of the THYROID gland (located outside the thyroid follicles)  that can lower blood calcium (HYPOCALCEMIA)
Term

    CALCITONIN lowers the Ca2+ concentration in the blood because:

a.

b.

Definition

a.     Calcitonin inhibits osteoclast activity.

 

b.     Calcitonin stimulates Ca2+ excretion by the kidneys.

Term
PTH is a ___
Definition
hormone of the chief cells of the PARATHYROID gland that can increase blood calcium (cause HYPERCALCEMIA)
Term

1)     The reason why PTH  may cause hypercalcemia because

a.

b.

c.

 

Definition

a.     PTH stimulates osteoclast activity and inhibits osteoblast activity

b.     PTH  stimulates the formation and secretion of calcitriol (vitamin D) at the kidneys

 

c.     PTH increases the reabsorption of calcium at the kidney  (less calcium loss in the urine)

Term
PTH is the ____
Definition
antagonist of CALCITONIN
Term

 Low PTH in blood causes 

Definition
convulsion (hypocalcaemia)
Term
GOITER is condition resulting from 
Definition
too much TSH or lack of iodine in the diet
Term

1)     Thyroid hormones (T3 and T4)

a.     Derive from ____

b.     Contain mineral ____

c.     Work with ___

d.     Are ____-soluble

e.     Are in ____

f.       Increase ____

g.     Have permissive effect on

Definition

1)     Thyroid hormones (T3 and T4)


a.     Derive from  amino acid TYROSIN

b.     Contain mineral iodine

c.     Work with intracellular receptors

d.     Are lipid-soluble

e.     Are in colloidal state (not readily diffuse out of the thyroid vesicles).

f.       Increase BMR (primary role in the maintenance of body temperature).

g.     Have permissive effect on epinephrine

Term
RENIN is responsible for
Definition
the activation of angiotensin I
Term

RENIN is released in response with

Definition
a decline in renal blood flow and sympathetic stimulation.
Term
Angiotensin I is converted to 
Definition
angiotensin II by enzyme ACE
Term

___ is a powerful vasoconstrictor

 It will promote _____

Definition

Angiotensin II is a powerful vasoconstrictor

 It will promote high blood pressure

Term
If Enzyme ACE is blocked, Angiotensin II will not be produced. Therefore ACE inhibitor drug is useful to treat hypertension
Definition
If Enzyme ACE is blocked, Angiotensin II will not be produced. Therefore ACE inhibitor drug is useful to treat hypertension
Term

Zona reticularis of the adrenal cortex produces ___


Zona fasciculata of the adrenal cortex produces _____________ [ increase the conversion of lipids to glucose ]


Zona glomerulosa of the adrenal cortex produces ________

Definition

Zona reticularis of the adrenal cortex produces sex hormones


Zona fasciculata of the adrenal cortex produces glucocorticoids (cortisol)

[ increase the conversion of lipids to glucose ]


Zona glomerulosa of the adrenal cortex produces mineralocorticoid (aldosterone)

Term

1)            CORTISOL:


a.     Produced by zona fasciculata of the adrenal cortex

b.     Controlled by the ACTH of the pituitary gland

c.     Makes the liver produce more glucose and glycogen to release more glucose in the blood and more glycogen in the muscle

d.     Broken down lipids (lipolysis) to release more fatty acids in the blood

 

Definition
Term

     Low cortisol in the blood due to damage of the zona fasciculata of the adrenal cortex causes a decrease ability to convert lipids to glucose

Definition
Low cortisol in the blood due to damage of the zona fasciculata of the adrenal cortex causes a decrease ability to convert lipids to glucose
Term

1)     Aldosterone:

 

a. increases___


b.  is released by ___


c.  is also released by either

 

Definition

a.     sodium concentration in blood (HYPERNATREMIA)


b.     angiotensin II

c. a fall in plasma Na+ or elevated plasma K+

Term

The adrenal medulla produces ___

 

Definition
catecholamine (epinephrine and nor-epinephrine)
Term

          Cortisone (hormone of the adrenal cortex) is synergistic to ___

Definition
growth hormone (hormone of the anterior pituitary gland)
Term

1)     Glucagon : (a CELL of the pancreas)


a.     increases ___


b.     It is released in response to __

 

c.     produced from the ___

Definition

a. blood sugar


b. low blood glucose (hypoglycemia)


c. alpha cells of the pancreas


 

Term

1)     Insulin: (b CELL of the pancreas)


a.     Decreases ___

b.     It is released in response to __

c.     Is required for __ and ___

d.     Increases __

 

e.     Produced by ___

Definition

a.     blood glucose

b.     high blood glucose (hyperglycemia)

c.     growth and development

d.     amino acid uptake by cells

 

e.     Beta cell of Islet of Langerhans of the pancreas

Term

1)     Pancreas:

a.     Mixed gland (endocrine and exocrine gland)

b.     Endocrine portion (insulin &glucagon) occupies 1% volume of the gland. It is located in the islet of Langerhans that produce HORMONES

 

c.     Exocrine portion (digestive enzymes) occupies 99% volume of the pancreas. It produces enzymes for digestion.

Definition
Term

1)     ANP (atrial natriuretic hormone):

a.     ANP is produced by  cardiac muscle cells in the  atria of the heart


b.     ANP helps in reduce blood volume and blood pressure by promoting sodium loss at the kidneys (more sodium in the urine)

 

c.      ANP is antagonistic with aldosterone and ADH (ANP¹ ADH or Aldosterone)

Definition
Term
Hormones of the kidneys include __, __ and __
Definition
RENIN, EPO and CALCITRIOL
Term


Hypothalamus acts as __

. It serves as the link between the __ and the __

Definition

Hypothalamus acts as an endocrine organ. It serves as the link between the endocrine and the nervous system

Term

1)     Thymosin:


a.     Hormone of the ___ produced by the ___

 

b.     Stimulates the __

Definition


a.     immune system produced by the thymus

 

b.     Stimulates the production of T cell

Term

1)     Testosterone:


a.     Male sex hormone

b.     Produced from the interstitial cell of the testis

c.     Is required for growth and development

 

d.     Increases aggressive behavior and sex drive

Definition
Term
STRESS
Definition

 

Any condition that threatens homeostasis is called __

Term

  The basic pattern of response that the body produces in response to stress is called ___

Definition


GAS (general adaptation syndrome)

Term
The hormone that dominates during the alarm phaseof the GAS is __
Definition
epinephrine
Term
The hormone that dominates during the resistance phaseof the GAS is 
Definition
glucocorticoids
Term

Alarm phase of the GAS (general adaptation syndrome)


a.     

 


b.     

 


c.     

 

d.  

 

Definition

a.     Increase heart rate and respiration rate

 


b.     Mobilize of energy reserve

 


c.     Increases mental illness

 

d.     Increases blood flow to the skeletal muscles and skin

Term

1)     1)     Resistance phase


a.    


b.    

 

c.   


 

Definition


a.     Occurs few hours after the alarm phase

 


b.     Lipid reserves are mobilized.

 


c.     blood glucose increased

Term

    The zona reticularis of the adrenal cortex produce __

Definition
androgen (male sex hormone)
Term

1)     Tumor of the adrenal  gland at the reticular reticularis cause __

Definition


abnormal production of estrogen  that leads to breast enlargement (GYNECOMASTIA).

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