B3.2 Flashcards
1
Q
What is the endocrine system?
A
Endocrine system:
- Collection of glands that secrete hormones
- Travels in the blood
- Reach a target organ to bring effect
2
Q
What is homeostasis?
A
Homeostasis:
- Helps to maintain a constant internal environment
3
Q
What are characteristics of hormones?
A
Hormones:
- Originate at glands
- Travel in blood
- Long lasting duration
- Slow speed of action
- Chemical signal type
4
Q
What is the pituitary gland?
A
Pituitary gland:
- Releases hormones, that can stimulate different glands to release hormones
5
Q
What is the thyroid gland?
A
Thyroid gland:
- Releases thyroxine
- Controls metabolism
6
Q
What is the adrenal gland?
A
Adrenal gland:
- Releases adrenaline
- Fight/flight response
7
Q
What is the pancreas?
A
Pancreas:
- Releases insulin
- Controls blood sugar levels
8
Q
What are the ovaries?
A
Ovaries:
- Releases oestrogen and progesterone
- Coordinates menstrual cycle
9
Q
What are the testes?
A
Testes:
- Produces testosterone
10
Q
What is negative feedback?
A
Negative feedback:
- Homeostatic change
- Body detects change in environment
- Makes adjustments to return back to normal
11
Q
How does body react to change in thyroxine?
A
Thyroxine:
- Brain detects change
- Send signal to pituitary gland via motor neurone
- Releases less thyroxine stimulating hormones
12
Q
What is FSH? (1)
A
FSH:
- Follicle stimulating hormone
- Produced in pituitary gland
- Travels to ovaries to stimulate oestrogen release
- Matures egg
13
Q
What oestrogen? (2)
A
Oestrogen:
- Produced in ovaries
- Thickens uterus lining
- Inhibits FSH release
- Stimulates LH release
14
Q
What is LH? (3)
A
LH:
- Luteinising hormone
- Produced in pituitary gland
- Ovulation (release of egg)
15
Q
What is a condom?
A
Condom:
- Non hormonal
