Test Your Brain With Facts And Questions About The Brain:Â Neuroscience Quiz
Test your brain with facts and questions about the brain !
Questions and Answers
- 1.
What if we lined up all the neurons in our body? How long would that line stretch?
- A.
100,000,000,000 neurons x 10 microns= 1000 km or about 600 miles
- B.
100,000,000,000,000 neuron x 10 microns= 5000 km or about 500 miles
- C.
10 neurons x 10 microns= 100 km or about 60 miles
- D.
1,000 neurons x 10 microns= 1000 km or about 600 miles
Correct Answer
A. 100,000,000,000 neurons x 10 microns= 1000 km or about 600 milesExplanation
If we lined up all the neurons in our body, the line would stretch for about 1000 km or 600 miles. This is calculated by multiplying the number of neurons (100,000,000,000) by the length of each neuron (10 microns) and converting it to kilometers.Rate this question:
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- 2.
What is the longest living cell in your body? This cell can live for your entire life time !
- A.
Skin Cells
- B.
Brain Cells
- C.
Blood Cells
- D.
Eye Cells
Correct Answer
B. Brain CellsExplanation
Brain cells, also known as neurons, are the longest living cells in the body. Unlike other cells that undergo constant turnover and replacement, brain cells are not easily regenerated. They can survive for a person's entire lifetime, making them the longest living cells. This is because the brain relies on a stable and consistent network of neurons to maintain its function and memory storage. While other cells in the body may die and be replaced, brain cells remain intact, allowing for long-term memory retention and overall brain function.Rate this question:
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- 3.
How much does the average human brain weigh?
- A.
5 pounds
- B.
2 pounds
- C.
6 pounds
- D.
3 pounds
Correct Answer
D. 3 poundsExplanation
The average human brain weighs approximately 3 pounds. This weight is an average estimate and can vary slightly from person to person. The brain is a vital organ responsible for controlling various bodily functions, processing information, and storing memories. Despite its relatively small size, the brain is incredibly dense and complex, containing billions of neurons and intricate neural connections. Its weight is influenced by factors such as age, sex, and overall body composition.Rate this question:
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- 4.
What percent of the total body weight does the adult human brain account for?
- A.
3 %
- B.
5 %
- C.
12 %
- D.
2 %
Correct Answer
D. 2 %Explanation
The adult human brain accounts for only 2% of the total body weight. This is a relatively small percentage considering the importance and complexity of the brain in controlling various bodily functions and cognitive abilities.Rate this question:
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- 5.
How much does the elephant brain weigh?
- A.
14 pounds
- B.
13 pounds
- C.
8 pounds
- D.
5 pounds
Correct Answer
B. 13 poundsExplanation
Elephant brains are known to be the largest among land mammals, weighing around 10 to 12 pounds on average. However, some larger elephants can have brains that weigh up to 13 pounds. Therefore, the correct answer is 13 pounds.Rate this question:
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- 6.
How many neurons (brain cells) does an average person have ?
- A.
100 billion neurons
- B.
10 billion neurons
- C.
100 million neurons
- D.
10 million neurons
Correct Answer
A. 100 billion neuronsExplanation
An average person has approximately 100 billion neurons in their brain. Neurons are the building blocks of the nervous system and are responsible for transmitting information throughout the body. These cells communicate with each other through electrical and chemical signals, allowing us to think, feel, and perform various functions. The large number of neurons in the human brain enables complex cognitive abilities and is crucial for our overall brain function.Rate this question:
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- 7.
How much area does the brain cover if laid flat?
- A.
5.5 square feet
- B.
10 square feet
- C.
2.5 square feet
- D.
5 square feet
Correct Answer
C. 2.5 square feetExplanation
The brain covers an area of 2.5 square feet when laid flat. This means that if the brain was removed from the skull and spread out, it would cover a surface area of 2.5 square feet.Rate this question:
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- 8.
What's the world record for someone going without sleep?
- A.
10 days
- B.
6 days
- C.
4 days
- D.
19 days
Correct Answer
D. 19 daysExplanation
The world record for the longest time someone has gone without sleep is 19 days. This means that the person was able to stay awake for 19 consecutive days without any sleep. This is an extraordinary feat as the average person requires around 7-9 hours of sleep per day to function properly. Going without sleep for such a prolonged period can have severe negative effects on a person's health and well-being.Rate this question:
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- 9.
How many times does your eye blink in a year?
- A.
200,000 times
- B.
4,200,000 times
- C.
10,230,000 times
- D.
1,000,000 times
Correct Answer
B. 4,200,000 timesExplanation
The average person blinks about 15-20 times per minute, which adds up to approximately 28,800 blinks per day. In a year, this would amount to around 10,512,000 blinks. However, during sleep, the blink rate decreases significantly. Considering this, the answer of 4,200,000 times seems plausible as it takes into account the reduced blink rate during sleep.Rate this question:
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- 10.
How long can the brain go without blood?
- A.
4-5 seconds
- B.
5-10 minutes
- C.
8-10 seconds
- D.
1-2 minutes
Correct Answer
C. 8-10 secondsExplanation
The brain can only go without blood for a very short period of time, approximately 8-10 seconds. This is because the brain requires a constant supply of oxygen and nutrients, which are delivered through the bloodstream. Without blood flow, the brain quickly begins to suffer from oxygen deprivation, leading to irreversible damage and potentially death. Therefore, it is crucial to restore blood flow to the brain as quickly as possible in cases of cardiac arrest or other medical emergencies.Rate this question:
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- 11.
How quickly can neurons reproduce during early development?
- A.
250,000 neurons/minute
- B.
400,000 neurons/minute
- C.
1,000,000 neurons/day
- D.
53,000 neurons/day
Correct Answer
A. 250,000 neurons/minuteExplanation
During early development, neurons can reproduce at a rapid rate of 250,000 neurons per minute. This indicates that the process of neuron reproduction is highly efficient and occurs at a significant pace. This rapid reproduction is crucial for the development and growth of the nervous system, allowing for the formation of a complex network of neurons necessary for various cognitive and physiological functions.Rate this question:
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- 12.
How much of your body heat is lost through your head?
- A.
20 - 30 %
- B.
30 - 40 %
- C.
40 - 50 %
- D.
50 - 60 %
Correct Answer
C. 40 - 50 %Explanation
The correct answer is 40 - 50%. This is because the head is one of the body's main areas of heat loss. It has a large surface area and is often exposed to the environment, making it more susceptible to heat loss. Additionally, the head contains many blood vessels close to the surface of the skin, which can further contribute to heat loss. Therefore, it is estimated that around 40 - 50% of body heat is lost through the head.Rate this question:
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- 13.
Does the octopus have a blind spot?
- A.
True
- B.
False
Correct Answer
B. FalseExplanation
The octopus does not have a blind spot. Unlike humans, who have a blind spot in each eye where the optic nerve connects, the octopus's optic nerve is located behind the retina, eliminating the blind spot. This allows the octopus to have a complete field of vision without any blind spots. Therefore, the statement "The octopus has a blind spot" is false.Rate this question:
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- 14.
How much does your skin alone weigh?
- A.
1 pound
- B.
2 pounds
- C.
4 pounds
- D.
6 pounds
Correct Answer
D. 6 pounds -
- 15.
How many eyes to scorpions have?
- A.
2 eyes
- B.
4 eyes
- C.
8 eyes
- D.
12 eyes
Correct Answer
D. 12 eyesExplanation
Scorpions have a total of 12 eyes. They have a pair of median eyes on the top of their head, a pair of lateral eyes on the sides of their head, and a group of smaller eyes on the front corners of their head. These eyes help the scorpions to detect movement and light in their surroundings, allowing them to hunt and navigate effectively.Rate this question:
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- 16.
Where are the ears of cricket located?
- A.
It's head
- B.
It's front legs
- C.
It's back legs
- D.
It's brain
Correct Answer
B. It's front legsExplanation
The ears of a cricket are located on its front legs. This is a unique feature of crickets, as most insects have their ears located on their heads. The ears on the front legs of crickets are called tympana and they are responsible for detecting sound vibrations in the environment. This adaptation allows crickets to hear the sounds of other crickets and communicate with each other through chirping.Rate this question:
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- 17.
What is the most complicated computer in the world?
- A.
The super computer
- B.
Your Brain
- C.
The rat's brain
- D.
The super complex computer
Correct Answer
B. Your BrainExplanation
The correct answer is "Your Brain." The brain is considered the most complicated computer in the world because it is responsible for controlling all bodily functions, processing information, and generating thoughts and emotions. It consists of billions of neurons that communicate through complex networks, allowing for intricate cognitive processes such as memory, problem-solving, and decision-making. The brain's complexity far surpasses any man-made computer, making it the most intricate and sophisticated computer in existence.Rate this question:
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- 18.
How much of your calories are used up by your brain?
- A.
20 - 30 %
- B.
40 - 50 %
- C.
10 - 20 %
- D.
1 - 10%
Correct Answer
A. 20 - 30 %Explanation
The brain is a highly active organ that requires a significant amount of energy to function properly. It is responsible for various cognitive processes, including thinking, learning, and controlling bodily functions. Therefore, it makes sense that a considerable portion of our daily calorie intake is utilized by the brain. The range of 20-30% seems plausible as it suggests that the brain consumes a substantial amount of energy but leaves room for other bodily functions to also utilize calories.Rate this question:
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- 19.
How many taste buds (tongue, palate, cheeks) do you have?
- A.
10,000
- B.
50,000
- C.
500,000
- D.
1,000,000
Correct Answer
A. 10,000Explanation
The average person has approximately 10,000 taste buds located on their tongue, palate, and cheeks. These taste buds are responsible for detecting the different tastes such as sweet, sour, salty, and bitter. They play a crucial role in our sense of taste and help us enjoy and appreciate the flavors of food and beverages.Rate this question:
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- 20.
What is the total number of smell receptor cells in your nose?
- A.
50 million
- B.
40 million
- C.
5 million
- D.
1 million
Correct Answer
B. 40 millionExplanation
The total number of smell receptor cells in the nose is 40 million. These cells, also known as olfactory receptor neurons, are responsible for detecting and transmitting smells to the brain. They are located in the olfactory epithelium, a specialized tissue in the nasal cavity. The large number of receptor cells allows for a wide range of smells to be detected and distinguished.Rate this question:
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Current Version
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Mar 20, 2023Quiz Edited by
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Mar 08, 2012Quiz Created by
Silvagabriel
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