Download App

BIOLOGY [2 Mark Question Answer]

Control and Coordination · ICSE STD 8 (ICSE - English Medium). 3 questions.

Questions

[2 Mark Question Answer]

🎯

Test yourself on this topic

3 questions · timed · auto-graded

Question 12 Marks
Which gland secretes adrenalin ? What is the function of adrenalin ?
Answer
One adrenal gland is present above each of the two kidneys. Adrenal glands produce the hormone adrenalin. It is released when a person is under stress or is involved in intensive exercise. It makes the heart beat faster, increases the flow of blood to the brain and helps to cope with stress.
View full question & answer→
Question 22 Marks
What are rods and cones ? What are their functions?
Answer
Rods and cones are the light sensitive cells present in the innermost layer, $($retina$)$ of an eye. Rods and cones are sensitive to light.
Functions of Rods :
Rod cells enable us to see is the dim light. Functions of cones :
Cone cells are the receptors responsible for coloured vision. They also help us to see in, strong light.
View full question & answer→
Question 32 Marks
Distinguish between motor, sensory and association neurons with respect to their functions.
Answer
Motor NeuronSensory NeuronAssociation Neuron
They carry impulses from the brain and spinal cord to the muscles and glands.They carry impulses from the sense organs to the spinal cord or brain.They transmit impulse from one neuron to another.
View full question & answer→
Generate Paper FreeAll Control and Coordination topics
[2 Mark Question Answer] - BIOLOGY STD 8 Questions - Vidyadip