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Control & Coordination - 2


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20 Questions MCQ Test Science & Technology for UPSC CSE | Control & Coordination - 2

Control & Coordination - 2 for Class 10 2022 is part of Science & Technology for UPSC CSE preparation. The Control & Coordination - 2 questions and answers have been prepared according to the Class 10 exam syllabus.The Control & Coordination - 2 MCQs are made for Class 10 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Control & Coordination - 2 below.
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Control & Coordination - 2 - Question 1

Artificial ripening of fruits is carried out by

Control & Coordination - 2 - Question 2

Involuntary actions in the body are controlled by

Control & Coordination - 2 - Question 3

Inter neuron junction where neurotransmitters are released

Detailed Solution for Control & Coordination - 2 - Question 3

Neuromuscular junctions are between axon ending and muscles and junction between axon ending of one neuron and dendrites of another neuron is termed synapse.

Control & Coordination - 2 - Question 4

Which of the following is not associated with growth of plant?

Detailed Solution for Control & Coordination - 2 - Question 4

Abscisic acid induces the formation of abscission  zone in the leaf stalk or petiole and brings about shedding of leaves. Thus, it is not associated with the growth of the plant. 

Control & Coordination - 2 - Question 5

Which of the following endocrine glands is unpaired ?

Detailed Solution for Control & Coordination - 2 - Question 5

All other glands except pancreas are paired. Pancreas is located in the duodenum (first part of intestine), loop.

Control & Coordination - 2 - Question 6

Which of the following statements is correct about receptors?

Control & Coordination - 2 - Question 7

Which of the following is not an example of cerebral reflex ?

Detailed Solution for Control & Coordination - 2 - Question 7

Withdrawal of hand after coming in contact with hot object.

Control & Coordination - 2 - Question 8

Ageing in human beings is caused by disappearance of which of the following glands?

Detailed Solution for Control & Coordination - 2 - Question 8

The correct answer is d

According to immunity theory, ageing is associated with the disappearance of the thymus gland by the late middle age in man and replaced by fat. It causes a weakening in the defense mechanisms of the body and in the course of time, leads to a large-scale decay and destruction of cells and tissues.

Control & Coordination - 2 - Question 9

Gigantism results due to

Detailed Solution for Control & Coordination - 2 - Question 9

Excess secretion of growth hormone by pituitary gland causes gigantism while its deficiency causes dwarfism.

Control & Coordination - 2 - Question 10

Which of the following is not a ductless gland?

Control & Coordination - 2 - Question 11

In humans, number of spinal nerves is

Control & Coordination - 2 - Question 12

Which hormone regulates the ionic balance in the body?

Control & Coordination - 2 - Question 13

Which of the following statements is not true about thyroid gland ?

Detailed Solution for Control & Coordination - 2 - Question 13

For secretion of thyroid, iodine is essential and not iron.

Control & Coordination - 2 - Question 14

Which of the following acts as both endocrine and exocrine glands?

Detailed Solution for Control & Coordination - 2 - Question 14

Pancreas are both exocrine and endocrine glands ; they are exocrine glands because they secrete products - pancreatic juice and endocrine because they secrete other substances directly into the blood stream. 

Control & Coordination - 2 - Question 15

In a neuron, conversion of electrical signal to a chemical signal occurs at/ in

Detailed Solution for Control & Coordination - 2 - Question 15

When the electrical impulse reaches the axon ending at synapse chemicals are released which on reaching the dendrite of next neuron again give rise to electrical impulse.

Control & Coordination - 2 - Question 16

Which endocrine gland is also known as ‘master gland’?

Control & Coordination - 2 - Question 17

Balance and posture of the body is controlled by

Detailed Solution for Control & Coordination - 2 - Question 17

Cerebellum is responsible for maintenance of body balance and posture.

Control & Coordination - 2 - Question 18

Abscisic acid controls

Detailed Solution for Control & Coordination - 2 - Question 18

Abscisic acid  is a plant  hormone that plays important role abscission of leave. It inhibits  stem elongation by inhibiting gibberellic acid. It prevents loss of dormancy in seeds. 

Control & Coordination - 2 - Question 19

Spinal cord originates from

Detailed Solution for Control & Coordination - 2 - Question 19

Medulla is the last part of hind-brain, spinal cord arises from it.

Control & Coordination - 2 - Question 20

The main effect of cytokinin in plants is to

Detailed Solution for Control & Coordination - 2 - Question 20

Cytokinin are a class of plant growth substances that promote cell division, in plant roots and shoots. They are involved primarily in cell growth and differentiation, but also affect apical dominance, axillary bud growth. Cytokinin are the plant hormones which promote cell division in plants. So, the correct answer is " Stimulate cell division. "

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