The endocrine system + fight or flight

The endocrine system: n... of glands which secrete h... into bloodstream

S... than nervous system but l... lasting effects

network, hormones, slower, longer

Hormones: c... m... released by glands

Glands: o... that release hormones

chemical messengers, organs

Target cells: have receptors for s... hormones

A hormone only affects a limited number of cells

The more hormone molecules binding to receptors, the stronger the response in target cellls

specific

Endocrine system:

S... -> h... -> p... g... -> e... g... -> h... -> t... c... -> r... -> n... f...

stimulus, hypothalamus, pituitary gland, endocrine gland, hormone, target cell, response, negative feedback

Change in body detected - h... -> p... -> tells gland to release h..., travels in blood -> t... c... -> r... to fix problem

hypothalamus, pituitary, hormone, target cell, response

Negative feedback:

1. Hypothalamus sends r... hormone to p... g...

2. P... g.. secretes s... hormone, stimulates t... g...

3. T... g... releases h..., levels in bloodstream increase

4. Hypothalamus detects high levels + stops

5. Pituitary gland stops

6. Target cell stops

releasing, pituitary gland, pituitary gland, stimulating, target cell, target cell, hormone

Endocrine gland, hormone + function:

Adrenal c... - c... - releases glucose for e... + supresses i... system

Adrenal m... - a... + n... - f... o... f... response

cortex, cortisol, energy, immune, medulla, adrenaline, noradrenaline, fight or flight

Endocrine gland, hormone + function:

Testes: t... - m... s... c....

Ovaries: o... - f... sexual characteristics

testosterone, male sexual characteristics, oestrogen, female

Endocrine gland, hormone + function:

Thyroid - t... - regulates m... r... + protein synthesis

Pineal - melatonin - s... w... cycle

thyroxine, metabolic rate, sleep wake

Fight or flight response:

a... (unconscious)

S... -> ForF system -> a... (sends distress signal) -> h... -> (activates both nervous + endocrine system)

automatic, stressor, amygdala, hypothalamus

Fight or flight response:

1. Nervous system: h... triggers s... branch of a... system

2. Sympathetic NS stimulates a... m...

3. Adrenal medulla secretes hormones a... + n... into bloodstream

4. Lead to range of p... changes, preparing for ForF

hypothalamus, sympathetic, autonomic, adrenal medulla, adrenaline, noradrenaline, physiological

Amygdala: brains 'emotional alarm system'

Helps brain detect t..., form e... memories + trigger ForF response

Processes e...

threats, emotional, emotions

Sympathetic state:

D.... pupils, ... heart + breathing rate, ... saliva + digestion

dilated, increased, inhibited

Parasympathetic state:

C... pupils, ... heart + breathing rate, ... saliva + digestion

constricts, decreased, stimulated