Study guide questions: A and P CH 25/26

Endocrine system:

uses chemical messengers through the bloodstream.

• slower and long lasting

Nervous system

uses electrical impulses and neurotransmitters to send messages.

• fast and short lived and sent to muscles/glands 

Classifications of hormones

• lipid soluble (steroid)

• water soluble (peptide)

• glycoprotein (amines) 

Why are steroids able to pass through

they are lipid soluble 

Permissiveness

When a small amount of one hormone allows another to have their full effect. 

*Yes:

can cells have _____ and ____ and neurotransmitters 

anterior pituitary gland 

Thyroid hormone (TSH) is stimulated by another hormone that comes from

Down regulation

decrease of receptor sites of the cell 

Classification of steroid hormones?

hormones manufactured by the endocrine cells from cholesterol.

• lipid soluble- can easily pass through the plasma membrane of target cell.

Classification of nonsteroid hormone?

Synthesized primarily from amino acids.

• uses second messenger model.

cholesterol 

Common molecule where all steroid hormones are derived

Synergism

2 hormones that work together to enhance each other’s effect

Master gland

pituitary 

Prolactin

effects milk production 

ADH and oxytocin 

Neurohypophysis (posterior pituitary) serves as storage and release site for?

Principle thyroid hormone

T3 

antagonistic to parathyroid hormone

What kind of action does calcitonin have

cell membrane, blood clotting, and neuromuscular excitability 

Which depends on normal levels of calcium in the blood:

thyroid glan

Abnormally high metabolic rate is associated with? 

pancreas

What gland is exocrine and endocrine?

What function does glucagon have?

increase blood glucose

If you have high blood levels of ADH, what might the person have?

dehydration or high temperatures 

What structure has the mind/body link?

hypothalamus

High levels of hCG would suggest what?

pregnancy 

Which hormone is used by some people to boost athletic performance or keep them looking younger?

human growth hormone, somatotropin

How can hormones act on one type of cell and not others?

receptors=lock and hormone=key 

Tissue hormone

it is a prostaglandin; it acts locally