quiz 2 Flashcards
What is meant by the term negative feedback
Responding to a stimulus in a way that reduces the effect of the stimulus
What effect does glucagon have on the liver?
Causes the liver to convert glycogen into glucose
Where in the body is testosterone made?
In the testes
Name an example of an activity that causes blood glucose concentration to increase
Eating,drinking
What does the thyroid gland do in response to a decreased metabolic rate?
Releases more thyroxine
What in the body causes Type 1 diabetes?
The body attacks pancreas cells,so the body no longer makes enough insulin
What 3 effects does adrenaline have on the body?
Increases heart rate, increases breathing rate,increases blood flow to brain and muscles
What does the thyroid gland do in response to a increased metabolic rate?
Releases less thyroxine
Name the 4 femal reproductive hormones
FSH
LH
Oestrogen
Progesterone
How long is the average female menstrual cycle?
28 days
What hormone does the thyroid gland produce?
Thyroxine
What molecule is glucose stored as in the body
Glycogen
What impact does increasing blood flow to brain and muscles have?
Increases delivery of glucose and oxygen
Name 3 things that need to be controlled for by the body’s homeostasis system
Blood glucose concentration
Body temperature
Water levels
What hormone is released in times of stress or danger?
Adrenaline
How do hormones travel in the body
Through the bloodstream
What is the role of the hormone thyroxine?
Stimulates basal metabolic rate,important for growth and development
Why does oestrogen inhibit FSH?
To prevent more than one egg maturing
Which female reproductive hormones are made in the ovaries?
Oestrogen and progesterone
Name 2 places in the body where glycogen is stored
Muscle cells,liver
What happens when blood glucose levels get to high(5 marks)
- pancreas detects an increase in blood glucose levels
- pancreas release insulin
- insulin is transported to liver
- Liver converts glucose—> glycogen
- blood glucose levels decrease
What happens when blood glucose levels get too low(5 marks)
- pancreas will detect decrease in blood glucose levels.
- pancreas releases glucagon
- Glucagon travels to liver
- Liver converts glycogen—> glucose
5, blood glucose levels increase
