Hormones and Receptors Flashcards Preview

Endocrine > Hormones and Receptors > Flashcards

Flashcards in Hormones and Receptors Deck (21):
1

who do endocrine glands communicate?

by hormone secretion

2

do endocrine glands have ducts?

no

3

name some overfall functions of the endocrine system

regulation of nutrient metabolsim, H2O and elctrolyte balance
enabling changes to stress
promote growth and development
control reproduction
controlling and integrating activities of cardio and digestive enzymes

4

what are the 3 main classes of hormones?

glycoproteins and peptides (insulin)

steroids e.g testosterone

tyrosine and tryptophan derivatives e.g adrenaline

5

how are amines transported in plasma?

mainly free as hydrophilic

6

how are peptides and proteins transported in plasma?

mainly free as hydrophilic

7

how are steroids transported in the plasma?

bound as hydrophobic

8

are steroids stored anywhere?

no

they are made and released on demand

9

what is the job of carrier proteins?

so carry steroids and thyroxine

they increase the amount transported in blood and prevent rapid excretion by preventing filtration by kidneys

10

what carrier protein binds to cortisol?

cortisol-binding globulin

11

what carrier protein binds to thyroxine?

thyroxine binding globulin

12

how do steroid hormones enter cells/

by diffusion

13

what does the sex steroid-binding globulin mainly bind to?

testosterone

14

what does albumin bind?

steroids and thyroxine

15

what does transthyretin bind?

thyroxine and some steroids

16

what are the main 3 types of hormone receptors?

G -protein coupled receptors
receptor kinases
nuclear receptor

17

which receptors are on the cell surface?

G protein coupled receptors and receptor kinases

18

what are the 3 classes of nuclear receptors?

class 1
class 2
hybrid

19

what activates the class 1 nuclear receptors?

mainly steroids

20

what activates the class 2 nuclear receptors?

mainly lipids

21

what activated the hybrid class nuclear receptors?

thyroid hormone