Endocrine System** Flashcards Preview

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Flashcards in Endocrine System** Deck (83)
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1

What is the function of the endocrine system?

Maintain homeostasis by releasing hormones and control prolonged continuous processes

2

How does the endocrine and nervous system work together?

Coordinate and direct the activity of the body's cells and to maintain homeostasis

3

What kind of cells are in the endocrine system?

Glandular epithelium

4

What kind of chemical signals does the endocrine system have?

Hormones

5

What is the specificity of response in the endocrine system?

Receptors on target cells

6

What is the speed of onset in the endocrine system?

Seconds to hours

7

How long is the duration of action in the endocrine system?

May be brief or may last for days if secretion ceases

8

Release their products at the body's surface (epithelium) or into body cavities through ducts; ducted

Exocrine Glands

9

What are some examples of exocrine glands?

Sweat, oil, saliva, pancreas, liver

10

Produce hormones that release into the blood or lymph; ductless

Endocrine glands

11

What are some examples of endocrine glands?

Pituitary, thyroid, pancreas, thymus

12

Chemical messengers released into the blood to be transported leisurely throughout the body

Hormones

13

Cells with specific receptors on which hormones exert their effect

Target cells

14

Where must protein receptors be present so the hormone can attach?

Plasma membrane

15

What does a hormone depend on so it could interact with its customers' receptors?

Molecular structure

16

Made from cholesterol; can pass straight through the target cell's membrane and cytoplasm and into its nucleus

Steroid

17

What are steroid hormones soluble in?

Lipids

18

What are steroid hormones insoluble in?

Water

19

Amino acid based molecules; activates/deactivates enzymes that trigger the desired change to the cell's activities

Non-steroid hormones

20

What prompts the endocrine glands to release or not release their hormones?

Negative feedback

21

What is hormone secretion activated by?

Internal or external stimulus

22

What do rising hormones inhibit?

Further hormone release

23

Endocrine organs are prodded into action by other hormones

Hormonal stimuli

24

What are some examples of hormonal stimuli?

Hypothalamus stimulates the anterior pituitary gland to secrete its hormone

25

Changing blood levels of certain ions and nutrients

Humoral stimuli

26

What are some examples of humoral stimuli?

Decreasing calcium levels stimulates the parathyroid ormone

27

Nerve fibers stimulate hormone release

Neural stimuli

28

What are some examples of neural stimuli?

Adrenal medulla releases norepinephrine and epinephrine during periods of stress

29

What types of chemicals can hormones be?

Steroids, peptides, amines, proteins, glycoproteins

30

Locally-produced lipids that affect the organ in which they are produced with a variety of effects

Prostaglandins