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Lakhmir Singh Test: Control & Coordination - Delhi Police Constable MCQ


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25 Questions MCQ Test - Lakhmir Singh Test: Control & Coordination

Lakhmir Singh Test: Control & Coordination for Delhi Police Constable 2024 is part of Delhi Police Constable preparation. The Lakhmir Singh Test: Control & Coordination questions and answers have been prepared according to the Delhi Police Constable exam syllabus.The Lakhmir Singh Test: Control & Coordination MCQs are made for Delhi Police Constable 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Lakhmir Singh Test: Control & Coordination below.
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Lakhmir Singh Test: Control & Coordination - Question 1

Which one of the endocrine glands is known as master gland ?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 1

Pituitary gland is called master gland because it controls the secretion of all other endocrine glands.

Lakhmir Singh Test: Control & Coordination - Question 2

Cerebral hemispheres are the centres of :-

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 2

Cerebral is centre of thinking, will power, reasoning and memory, experience and learning knowledge and articulate speech.

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Lakhmir Singh Test: Control & Coordination - Question 3

The cerebellum is concerned with :-

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 3

The cerebellum is located behind the brain stem. While the frontal lobe controls movement, the cerebellum " fine - tunes " this movement. This area of the brain is responsible for fine motor movement, balance and thr brain's ability to determine limb position.

Lakhmir Singh Test: Control & Coordination - Question 4

Learning (intelligence) is related to :-

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 4

The cerebrum, the large, outer part of the brain, controls reading, thinking, learning, speech , emotions and planned muscle movements like walking.

Lakhmir Singh Test: Control & Coordination - Question 5

Junction of two neurons is called :-

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 5

Synapse, also called Neuronal junction, the site of transmission of electric nerve impulses between two nerve cells or between a neuron and a gland or muscle cell.

Lakhmir Singh Test: Control & Coordination - Question 6

The reflex arc in the reflex action is formed by :-

Lakhmir Singh Test: Control & Coordination - Question 7

Olfactoreceptors help to respond to :-

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 7

Olfactory means related to smell hence olfactor receptors help to respond to smell.

Lakhmir Singh Test: Control & Coordination - Question 8

Brain is a part of :-

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 8

The central nervous system (CNS) controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord.

The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement. Like a central computer, it interprets information from our eyes (sight), ears (sound), nose (smell), tongue (taste), and skin (touch), as well as from internal organs such as the stomach.

Lakhmir Singh Test: Control & Coordination - Question 9

What is the function of nervous and muscular tissues in animals?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 9

Control and coordination are provided by nervous and muscular tissues in animals.

Lakhmir Singh Test: Control & Coordination - Question 10

Which part of a neuron acquires information from the environment?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 10

Information is acquired at the end of the dendritic tip of a nerve cell.

Lakhmir Singh Test: Control & Coordination - Question 11

What type of receptors detect taste and smell?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 11

Gustatory receptors detect taste while olfactory receptors detect smell.

Lakhmir Singh Test: Control & Coordination - Question 12

Where are sensory impulses integrated before a response is generated?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 12

Sensory information travels from the body to the spinal cord before reaching the brain. This information ascends upwards using first, second, and third-order neurons. 

Lakhmir Singh Test: Control & Coordination - Question 13

What is the purpose of the peripheral nervous system?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 13

The peripheral nervous system facilitates communication between the central nervous system and other parts of the body.

Lakhmir Singh Test: Control & Coordination - Question 14

How do plants respond to stimuli without a nervous system?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 14

Plants respond to stimuli by changing cell shape and direction of growth.

Lakhmir Singh Test: Control & Coordination - Question 15

What causes the leaves of a sensitive plant to fold up and droop when touched?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 15

The leaves of a sensitive plant move in response to touch by changing cell shape.

Lakhmir Singh Test: Control & Coordination - Question 16

How do plants communicate information between cells in response to stimuli?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 16

Plants communicate information between cells via hormonal secretions.

Lakhmir Singh Test: Control & Coordination - Question 17

Which hormone is responsible for promoting cell elongation in response to light?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 17

Auxin promotes cell elongation in response to light.

Lakhmir Singh Test: Control & Coordination - Question 18

What causes the tendril of a pea plant to circle around an object it touches?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 18
  1. Tendrils are sensitive in nature.
  2. They mainly respond to touch by growing and winding around the object.
  3. The coiling mechanism occurs when the part of the tendril which touches the object stops growing.
  4. Thus, the remaining part grows faster because of the plant hormone auxin which cause the coiling effect.
  5. Auxin stimulates cell growth on the opposite side so that the coil forms rapidly.
  6. The coiled portion of the tendrils is later concentrated with sclerenchyma cells to provide rigidity.
  7. The twining tendency of the tendril causes it to encircle or coil around the object it comes in contact with.
Lakhmir Singh Test: Control & Coordination - Question 19

What is the term for directional growth movements in response to stimuli?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 19

Directional growth movements in response to stimuli are termed as tropism.

Lakhmir Singh Test: Control & Coordination - Question 20

Which hormone inhibits growth in plants?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 20

Abscisic acid inhibits growth in plants.

Lakhmir Singh Test: Control & Coordination - Question 21

What happens to auxin concentration when light is coming from one side of the plant?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 21

Auxin concentration increases on the shaded side of the plant.

Lakhmir Singh Test: Control & Coordination - Question 22

How do plants respond to gravity?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 22
  • Plants react to gravity with a process called gravitropism or geotropism.
  • Roots:
    • Positive Gravitropism: Roots grow downward towards gravity to anchor the plant and get water and nutrients.
  • Stems and Shoots:
    • Negative Gravitropism: Stems and other above-ground parts grow upwards, opposite to gravity, to reach light for photosynthesis.
  • This reaction to gravity is controlled by special cells called statocytes, housing dense structures termed statoliths.
  • These statoliths settle at the base of statocytes due to gravity, prompting chemical signals guiding plant tissue growth.
  • Overall, plants utilize gravitropism to position their growth correctly: roots head down for stability and nourishment, while stems and shoots grow up for light exposure.
Lakhmir Singh Test: Control & Coordination - Question 23

What is the main function of gibberellins in plants?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 23

Gibberellins are a group of plant hormones that regulate various growth and development processes. Their main function is to stimulate cell elongation, making plants grow taller.

Lakhmir Singh Test: Control & Coordination - Question 24

How do plants detect light for directional growth movements?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 24

Plants detect light for directional growth movements by sensing changes in light intensity.

Lakhmir Singh Test: Control & Coordination - Question 25

What causes the directional movement of plant parts in response to environmental triggers?

Detailed Solution for Lakhmir Singh Test: Control & Coordination - Question 25

Hormonal secretions cause the directional movement of plant parts in response to environmental triggers.

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