Digestive System Flashcards
Homeostasis
Maintenance of a constant internal environment
What temperature should a human body be kept at and why
37° C
So enzymes don’t become denatured
For optimum enzyme activity
So active site of enzymes don’t lose their shape
What happens to the human body in an increase in body temperature
Sweating
body hairs lie flat
Ectotherm organism
organisms whose body temperature depends on their external environment
How does ______ contribute to homeostasis:
1. Liver
2. Lungs
- Breaks down toxins, generates heat
- Excretion of water or CO2, release of heat
Where does:
1. Peristalsis occur
2. Deamination occur
3. Bile store
- Oesophagus
- Liver
- Gall bladder
Organs connected by hepatic portal vein
Intestine to liver
Substances stored in the liver
Vitamin A,D,E,K
Glycogen
Iron
Copper
Benefits of dietary fibre
Normalise bowel movements
Lower cholesterol levels
May reduce risk of some cancers
Aids in weight management
Digestion & its role in humans
The breakdown of food
(To make nutrients soluble, for transport of nutrients)
Egestion
Removal of undigested waste from the human body
Function and location of villi
Small intestine
To increase surface area
Role of lacteal
To absorb digested fats
Function of liver
detoxification
Produces bile
Breaks down red blood cells
Peristalsis
Food is moved along the digestive system by muscular contractions
