Advertisements
Advertisements
Question
Briefly describe the following:
Angina Pectoris
Advertisements
Solution
- When enough oxygen does not reach the heart muscles, angina pectoris develops, causing chest pain and discomfort.
- Angina pectoris is the pain in the chest. It results from a reduction in blood supply to cardiac muscle due to narrowed and hardened coronary arteries.
- Angina pectoris often occurs during exertion, when the heart demands more oxygen and narrowed blood vessels cannot supply. It disappears with rest.
APPEARS IN
RELATED QUESTIONS
Differentiate between Transpiration and Evaporation
What causes the opening and closing of guard cells of stomata during transpiration?
Water reaches great heights in the trees because of suction pull caused by ______.
The loss of water in the form of water vapour through stomata on leaves is known as ___________.
Define the three processes by which plants absorb water and minerals from the soil.
Fill in the blank:
Water is lost from the leaves by__________.
How does transpiration help in the uptake of water from the soil?
(a) State whether the following statement are True or False.
(b) Rewrite the false statement in the correct form by changing either the first or the last word only.
Most transpiration occurs at midnight.
Give suitable explanation for the following:
On a bright sunny day, the leaves of certain plants roll up.
Given alongside is the diagram of an experimental set-up to demonstrate a certain phenomenon in plants.
Name the phenomenon being demonstrated.
The figure given below represents an experimental setup with a weighing machine to demonstrate a particular process in plants. The experimental setup was placed in bright sunlight. Study the diagram and answer the following questions.
Name the process intended for study.
Design an experiment to demonstrate the transpiration process.
Describe an experiment to prove that transpiration occurs more from the undersurface of dorsiventral leaves.
Give Technical Term
When cobalt chloride paper is placed on lower and upper surface of the leaf, the paper of which side becomes more pink?
Plants lose water by the process of transpiration.
Boojho’s uncle was hospitalised and put on dialysis after a severe infection in both of his kidneys.
What is dialysis?
Write a note on Transpiration.
The radio labelled carbon in carbon dioxide supplied to potato plants in an experiment was seen in the tuber eventually. Trace the movement of the labelled carbon dioxide.
Water molecule is very polar. Polar end of molecule attracts opposite charges on another water molecule (acts like magnet). How will you explain this property of water with reference to upward movement of water? Comment on the upward movement of water given the intermolecular hydrogen bonding in water.
A root hair is derived from ______ cell.
