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Flashcards in chapter 17 Deck (143)
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Which system communicates by electrical impulses and transmitters?

Nervous system

1

Which system communicates by hormones?

Endocrine system

2

Which system releases hormones into the bloodstream and can go all over the body?

Endocrine system

3

Which system releases neurotransmitters at target cells?

.

4

Which system reacts quickly within 1 to 10 ms?

The nervous system

5

Which system has local specific effects?

Nervous system

6

Which system has general widespread effects

Endocrine system

7

Which system reacts more slowly could take seconds to days because of so many places to go?

Endocrine system

8

Which system stops quickly when the stimulus stops?

Nervous system

9

Which system continues responding longer even after the stimulus stops it start slowly stop slowly?

Endocrine system

10

what is a chemical messenger it stimulates the physiology of cells in another tissue or organ?

Hormone

11

What makes a tissue or organ change what they're doing?

A hormone

12

What are the three classes of hormones?

Steroid hormones
peptide hormones
monoamine's

13

Which type of hormone is derived from the cholesterol molecule?

Steroid hormones

14

What hormone is hydrophobic which means it won't dissolve in water so it must bind to transport proteins in plasma?

Steroid hormone

15

Which hormones are large and are called proteins and have chains of 3-200+ amino acids?

Peptide hormones

16

Which hormone is hydrophilic which means it likes water so it can mix with blood plasma and travel in blood?

Peptide hormone

17

What means one amino acid?

Monoamine

18

This hormone is also hydrophilic and is made from amino acids tryptophan or tyrosine. Most are the same as peptide hormones.

Monamine

19

A thyroid hormone is what type of hormone?

monoamine

20

What is the mode of action of a hormone?

Alteration of cell activity.
Hormones only stimulate cells that have receptors for them.

21

What do receptors do?

They act like switches to turn certain metabolic pathways on or off when the hormone binds to them.

22

What is specificity?

It means being picky. The receptor for one hormone will not bind other hormones

23

What is saturation?

All of the receptor molecules are occupied by hormones

24

Which hormones diffuse through the plasma membrane and entered the nucleus?

Steroid hormones

25

Which hormones bind to receptors associated with DNA?

Steroid hormones

26

What hormone cannot penetrate into a target cell?

Peptide hormones

27

A hormone that binds to cell surface receptor which then activates the G protein and the G protein migrates to effector enzyme And activates it which generates the second messenger?

The second messenger then activates other enzymes which catalyze or inhibit metabolic reactions

Cyclic AMP, DAG, IP3 act as second messengers

Peptide hormones

28

What is amplification?

When one hormone can trigger the synthesis of many enzymes

29

When the target cell increases the number of recepters and becomes more sensitive to the hormone, this type of modulation of target cell sensitivity is called?

Up-regulation