Biology life process Flashcards
What are unique features in artery and veins?
Ateries have thick walls.
Veins have valves
What are the types of blood vessels?
artery,veins,cappilaries
What are valves used for?
To prevent back flow of blood
What element is used for synthesis of proteins?
Nitrogen
In plants which tube transports water and mineral obtained at soil
Xylem
In plants which tube transports products of photosynthesis from leaves
Phloem
What is transpiration and how does it help the plant?
The loss of water in the form of vapour from the aerial parts of the plant is known as transpiration.
It helps in temperature regulation.
What is translocation?
Transport of soluble products of photosynthesis is called translocation.
How is phloem know as?
Vascular tissue
What does phloem transport?
Sucrose and amino acids
Where does translocation of food and other substances takes place?
Sieve tube with the help of adjacent companion cells both upward and downward direction
How is translocation in phloem achieved?
By utilising energy
What are removed from blood in kidneys
Nitrogenous waste such as urea or uric acid
What are the filtration units?
Nephrons
What are the parts included in excretory system of human beings?
A pair of kidneys, a pair of ureters, a urinary bladder and a urethra
What are the substance re-absorbed in selective reabsorption?
glucose, amino acids, salts and a major amount of water.
. What are the factors based on which the amount of water is reabsorbed?
- How much excess water there is in the body
2. How much waste there is to be excreted?
What is the use of artificial kidney?
Artificial kidney is a device to remove nitrogenous waste products from the blood through dialysis
What is the function does not occur in kidney?
Selective reabsorption
What is the volume of initial filtrate in the kidney of a healthy adult daily?
180L
Volume of urine excreted daily
1-2 litre
Where is many plant waste products stored?
cellular vacuole.
Other waste products are stores in resin and gums especially in old xylem
What are the dividing walls in heart called as?
Septum
