Tag: biology

Questions Related to biology

The path of passage of stimulus when you accidentally touch a hotplate is?

biology nervous system of man structure and function of spinal cord the spinal cord spinal cord

  1. receptor $\rightarrow$ brain $\rightarrow$ muscles

  2. muscles $\rightarrow$ spinal cord $\rightarrow$ receptor

  3. muscles $\rightarrow$ brain $\rightarrow$ receptor

  4. receptor $\rightarrow$ spinal cord $\rightarrow$ muscles

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Correct Option: D

Destruction of anterior horn cells of spinal cord would result in loss of

biology nervous system of man structure and function of spinal cord the spinal cord spinal cord

  1. Sensory impulses

  2. Voluntary motor impulses

  3. Commissural impulses

  4. Integrating impulses

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Correct Option: B

Amount of CSF in cranial cavities is

biology nervous system of man structure and function of spinal cord the spinal cord spinal cord

  1. 500 ml

  2. 140 ml

  3. 1 litre

  4. 1.5 ml

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Correct Option: B

Choose the correct answer from the alternatives given.
Which of the following structures or regions is incorrectly paired with its function?

biology nervous system of man structure and function of spinal cord the spinal cord spinal cord

  1. Brocas regions-screening of information between the spinal cord and the brain regulates arousal and sleep

  2. Medulla oblongata - homeostatic control centres

  3. Cerebellum - unconscious co-ordination of movement and balance

  4. Hypothalamus - production of hormones and regulation of temperature, hunger, and thirst

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Correct Option: A
Explanation:

Broca's area is a region in the frontal lobe of the dominant hemisphere, usually the left, of the brain with functions linked to speech production.

So, the correct option is 'Broca's region - Screening of information between the spinal cord and the brain regulates arousal and sleep'.

How many laminae are present in grey matter of spinal cord

biology nervous system of man structure and function of spinal cord the spinal cord spinal cord

  1. Four

  2. Six

  3. Eight

  4. Ten

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Correct Option: D

Which of the following has H-shaped grey matter?

biology nervous system of man structure and function of spinal cord the spinal cord spinal cord

  1. Cerebrum

  2. Medulla oblongata

  3. Cerebellum

  4. Spinal cord

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Correct Option: D

Lateral funiculi possess ganglia

biology nervous system of man structure and function of spinal cord the spinal cord spinal cord

  1. Sensory

  2. Motor

  3. Both A and B

  4. None of the above

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Correct Option: D
Explanation:

Lateral funiculi are part of white matter of spinal cord having myelinated nerve fibres. Cell bodies/ganglia occur in grey matter that lies inside and in horns of spinal cord.

Recycling of paper has reduced 

biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling

  1. Reforestation

  2. Deforestation

  3. Aforestation

  4. None of the above

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Correct Option: B

Which of the following is the main contribution of recycling of paper?

biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling

  1. Pollution is reduced by 95%

  2. Energy is conserved by 20%

  3. Water is conserved by 90%

  4. None of the above

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Correct Option: D
Explanation:

D- Recycled paper production reduces transport and CO2 emissions. Recycling one ton of paper can save 17 mature trees and 7000 gallons of water and 4100 kilowatt-hours of electricity.

Paper and Glass are the wastes that can be

biology garbage in, garbage out recycling of paper ways to reduce non degradable garbage recycling

  1. Reuse

  2. Recycle

  3. Decompose

  4. Both A and B

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Correct Option: B
Explanation:
The 'three Rs' that will help us to conserve natural resources for long-term use are reduced, recycle and reuse.
Reduce- Make use of smaller or less in amount, degree or size. For example, electricity and water.
Recycle- Convert (waste) into reusable material. For example, plastic cups and buckets, glass tumbler, paper, metal objects.
Reuse- Use again or more than once. For example, used envelopes, plastic carry bags, bottles of jam. 
Thus, the correct answer is option B.