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Olympiad Test: Human Body -1 - Class 4 MCQ


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20 Questions MCQ Test Science Olympiad Class 4 - Olympiad Test: Human Body -1

Olympiad Test: Human Body -1 for Class 4 2024 is part of Science Olympiad Class 4 preparation. The Olympiad Test: Human Body -1 questions and answers have been prepared according to the Class 4 exam syllabus.The Olympiad Test: Human Body -1 MCQs are made for Class 4 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Olympiad Test: Human Body -1 below.
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Olympiad Test: Human Body -1 - Question 1

Digestion starts in our

Detailed Solution for Olympiad Test: Human Body -1 - Question 1

The digestive process starts in your mouth when you chew. Your salivary glands make saliva, a digestive juice, which moistens food, so it moves more easily through your esophagus into your stomach.

Olympiad Test: Human Body -1 - Question 2

The function of molar teeth can be best illustrated by the function of:

Detailed Solution for Olympiad Test: Human Body -1 - Question 2

Molars are specially designed for crushing and chewing plant foods into easily swallowable and digestible pieces. They also help to maintain the proper positioning of the jaws. They enable them to slice and grind their food efficiently. 

Molar (tooth) - Wikipedia

Olympiad Test: Human Body -1 - Question 3

________ carries oxygen to all parts of body.

Detailed Solution for Olympiad Test: Human Body -1 - Question 3

Blood carries oxygen to all body parts.

Olympiad Test: Human Body -1 - Question 4

The respiratory system in humans consists of:

Detailed Solution for Olympiad Test: Human Body -1 - Question 4

The respiratory system consists of all the organs involved in breathing. These include the nose, pharynx, larynx, trachea(windpipe), bronchi, and lungs.

 

Olympiad Test: Human Body -1 - Question 5

Which system do kidneys belong to?

Detailed Solution for Olympiad Test: Human Body -1 - Question 5

Kidneys belong to the excretory system. The organs of the excretory system include the kidneys, renal pelvis, ureters, bladder and urethra.

Olympiad Test: Human Body -1 - Question 6

Soni got injured and her friend gave her an immediate first-aid treatment. She was made to lie down with her legs raised so that her head was lower than her body. Soni most likely:

Detailed Solution for Olympiad Test: Human Body -1 - Question 6

The correct answer is (B) Fainted.
Explanation:
Soni most likely fainted, and her friend gave her an immediate first-aid treatment to help her recover. The first aid given to Soni, which involved lying down with her legs raised and her head lower than her body, is a common first-aid method for someone who has fainted. This position helps:
- Increase blood flow to the brain: Raising the legs increases blood flow to the brain, which can help restore consciousness.
- Prevent further fainting: This position helps prevent further fainting episodes by ensuring that the brain receives adequate blood supply.
- Promote recovery: Lying down can help the person feel more comfortable and recover faster after fainting.
Other options such as electric shock, insect bite, or burns would require different first-aid treatments and would not typically involve raising the legs and lowering the head.

Olympiad Test: Human Body -1 - Question 7

Which part of our body regulates our walking, talking, eating, etc.?

Detailed Solution for Olympiad Test: Human Body -1 - Question 7

The brain controls what you think and feel, how you learn and remember, and the way you move and talk. But it also controls things you're less aware of — like the beating of your heart and the digestion of your food.

Olympiad Test: Human Body -1 - Question 8

Which of the following activities will increase our heart rate?

Detailed Solution for Olympiad Test: Human Body -1 - Question 8

Running will increase our heart rate as it requires more energy from our body which needs quick pumping of blood from the heart.

carolynnyoe — ❤ | Running gif, Exercise images, Exercise

Olympiad Test: Human Body -1 - Question 9

The following diagram represents an organ, which takes in oxygen and gives out carbon dioxide. Name the organ.

Detailed Solution for Olympiad Test: Human Body -1 - Question 9

The lungs and respiratory system allow us to breathe. They bring oxygen into our bodies (called inspiration, or inhalation) and send carbon dioxide out (called expiration, or exhalation). This exchange of oxygen and carbon dioxide is called respiration.

Olympiad Test: Human Body -1 - Question 10

The inner layer of the stomach releases:

Detailed Solution for Olympiad Test: Human Body -1 - Question 10

The innermost layer or lining (mucosa) contains the glands that release digestive juices. This is the first and innermost layer or lining. It contains the glands that release digestive juices. These are called hydrochloric acid and pepsin

Olympiad Test: Human Body -1 - Question 11

Digested food is absorbed by:

Detailed Solution for Olympiad Test: Human Body -1 - Question 11

The digested food is absorbed into the blood in the human body. After digestion, the absorption occurs in the small intestine through the finger-like projections called villi present on the wall of the intestine.

Olympiad Test: Human Body -1 - Question 12

Digested food is absorbed by blood in the:

Detailed Solution for Olympiad Test: Human Body -1 - Question 12

The small intestine absorbs digested food and sends it to the blood in our body, which transfers it to various parts of our body.

Olympiad Test: Human Body -1 - Question 13

In the figure given below, urine is stored in:

Detailed Solution for Olympiad Test: Human Body -1 - Question 13

C in the diagram represents Urinary Bladder, where the urine is stored before releasing.

Olympiad Test: Human Body -1 - Question 14

Blood in our body is filtered by the:

Detailed Solution for Olympiad Test: Human Body -1 - Question 14

In our body, the dirty blood is filtered in the kidneys by the glomerulus present in them. In addition, kidneys regulate and filter minerals from blood.

Olympiad Test: Human Body -1 - Question 15

Which of the following organs is bean-shaped?

Detailed Solution for Olympiad Test: Human Body -1 - Question 15


An image of kidney (brown coloured)

Olympiad Test: Human Body -1 - Question 16

___ system controls and coordinates the activities of all the systems in our body.

Detailed Solution for Olympiad Test: Human Body -1 - Question 16

The nervous system consists of the brain, spinal cord, sensory organs and all of the nerves that connect these organs with the rest of the body. Together, these organs are responsible for the control and coordination of the activities of all the systems in our body.

Olympiad Test: Human Body -1 - Question 17

The two lower chambers of the heart are called:

Detailed Solution for Olympiad Test: Human Body -1 - Question 17


The two lower chambers are called ventricles

Olympiad Test: Human Body -1 - Question 18

Digestion is completed in the:

Detailed Solution for Olympiad Test: Human Body -1 - Question 18

Digestion begins in the mouth, when you chew and swallow, and is completed in the small intestine

Olympiad Test: Human Body -1 - Question 19

Undigested solid waste is excreted through:

Detailed Solution for Olympiad Test: Human Body -1 - Question 19

Anus is the opening at the lower end of the digestive tract through which solid waste is excreted.

Olympiad Test: Human Body -1 - Question 20

An adult has ____ teeth.

Detailed Solution for Olympiad Test: Human Body -1 - Question 20

Adults have more teeth than children; most adults have 32 teeth.

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