VSAQ for Control and Cordination Class 10 Science NCERT
Important Questions1
What is meant by tropic movements?
Answer
Plant growth movements in response to stimuli from a particular direction are called tropic movements. The direction of movement is always related to the direction of stimulus.
VSAQ
2
Define phototropism.
Answer
Movement or bending of the shoot towards the direction of light is called phototropism.
VSAQ
3
Give one example of chemotropism.
Answer
The growth of pollen tube towards ovule.
VSAQ
4
State the main functions of abscisic acid in plants.
Answer
Abscisic acid inhibits the growth of plants.
VSAQ
5
Name two components of central nervous system in humans.
Answer
Brain and spinal cord.
VSAQ
6
Name the two components of peripheral nervous system.
Answer
Cranial nerves arising from the brain and the spinal nerves arising from the spinal cord.
VSAQ
7
Name the largest cell present in the human body.
Answer
Neuron.
VSAQ
8
Mention the part of the brain which controls the involuntary actions like blood pressure, salivation etc.
Answer
Medulla in the hindbrain.
VSAQ
9
Name the part of the brain which controls posture and balance of the body.
Answer
Cerebellum.
VSAQ
10
Name the part of the neuron where information is acquired.
Answer
Dendrite.
VSAQ
11
Name the part of neuron through which the information travels as an electric impulse.
Answer
Axon
VSAQ
12
What is synapse?
Answer
The junction between neurons is called synapse.
VSAQ
13
Name the sensory receptors found in the nose and on the tongue.
Answer
Olfactory and Gustatory receptors.
VSAQ
14
Mention the part of the body where gustatory and olfactory receptors are located.
Answer
Tongue and Nose.
VSAQ
15
Define feedback mechanism of hormones.
Answer
The mechanism that controls the flow of hormones is called feedback mechanism of hormones.
VSAQ
16
Name the mechanism by which amount of hormone in the blood is regulated.
Answer
Feedback mechanism.
VSAQ
17
Name the hormones in humans which regulates carbohydrate, protein and fat metabolism in the body. Mention the site where it is synthesized.
Answer
The hormone is thyroxin. The site where it is synthesized is thyroid gland.
VSAQ
18
Name the diseases by which a person is likely to suffer due to the deficiency of:
(i) Iodine
(ii) Insulin.
Answer
(i) Goitre
(ii) Diabetes.
VSAQ