Tag: biology

Questions Related to biology

Hunger is

biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

  1. External stimuli

  2. Internal stimuli

  3. Response

  4. Both A and B

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Correct Option: B
Explanation:
  • The stimulus(singular) is any change in the organism's internal or external environment that causes the organism to react. It is of two types external and internal.
  • External stimulus is the stimulus that comes outside of the organism. For example, Light stimulus, heat stimulus, chemical stimulus, etc.
  • The internal stimulus is the stimulus that comes from inside an organism. For example, Hunger, thirst, etc.
  • Hence Hunger is Internal stimuli.
  • So, the correct answer is 'Internal stimuli'.

Which of the following is called as stimulus?

biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

  1. Light

  2. Temperature

  3. Sound

  4. All of the above

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Correct Option: D
Explanation:
  • The stimulus(singular) is any change in the organism's internal or external environment that causes the organism to react. It is of two types external and internal.
  • External stimulus is the stimulus that comes outside of the organism. For example, Light stimulus, heat stimulus, chemical stimulus, sound stimulus, etc.
  • The internal stimulus is the stimulus that comes from inside an organism. For example, Hunger, thirst, etc.
  • So, the correct answer is 'All of the above'.

A stimulus for the olfactory receptor is 

biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

  1. Taste

  2. Smell

  3. Touch

  4. All of the above

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Correct Option: B
Explanation:
  • The olfactory receptor neurons are located in a small region within the superior nasal cavity. This region is referred to as the olfactory epithelium.
  • When the airborne molecules are inhaled through the nose, they pass over the olfactory epithelial region and the olfactory receptors are stimulated and in turn, the smell is perceived.
  • Hence A stimulus for the olfactory receptor is smell.
  • So, the correct answer is 'Smell'.

Example of stimulus is

biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

  1. Hunger

  2. Sadness

  3. Ache

  4. All of the above

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Correct Option: D
Explanation:
  • In physiology, a stimulus is a detectable change in the internal or external environment. The ability of an organism or organ to respond to external stimuli is called sensitivity. 
  • When a stimulus is applied to a sensory receptor, it normally elicits or influences a reflex. Hence, Example of stimulus is Hunger, Sadness and Ache.
    • So, the correct answer is 'All of the above'.

The ability of an organism to respond to external stimuli is called as

biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

  1. Sensitivity

  2. Homeostasis

  3. Metabolism

  4. None of the above

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Correct Option: A
Explanation:
  • The stimulus(singular) is any change in the organism's internal or external environment that causes the organism to react.
  • The ability of an organism to respond to external stimuli is called sensitivity. For example, Plants grow towards light(external stimuli) sources, and if the direction of light is changed, the plant will also change its direction of growth to accommodate for survival.
  • So, the correct answer is 'Sensitivity'.

Nociceptors detect

biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

  1. Change in temperature

  2. Touch and pressure

  3. Light

  4. Tissue damage

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Correct Option: D
Explanation:
  • Nociceptors are sensory receptors which detect signals from damaged tissue 
  • These receptors detect the damaged tissue or threat of damage to tissue and send signals to the spinal cord and the brain.
  • Examples for Nociceptive pain includes  sprains, bone fractures, burns, bumps, bruises, inflammation .
  • Hence Nociceptors detect 'Tissue damage'.
  • So, the correct answer is 'Tissue damage'.

Receptors to both touch and pressure are called as 

biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

  1. Thermoreceptors

  2. Mechanoreceptors

  3. Chemoreceptors

  4. Phonoreceptors

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Correct Option: B
Explanation:
  • A receptor is a protein molecule usually found embedded in the plasma membrane surface of the cell that receives chemical signals from outside the cell and when such chemical signals bind to the receptor, They cause some form of cellular or tissue response.
  • There are four main types of receptors: mechanoreceptors(touch and pressure), thermoreceptors(heat), pain receptors(pain), and proprioceptors(position and movement).
  • Hence Receptors to both touch and pressure are called as Mechanoreceptors.
  • So, the correct answer is 'Mechanoreceptors'.

Which of the following array of genes can be related to a kidney transplant?

biology excretion - the wastage disposing system artificial kidney kidney transplant disorders of kidney

  1. MHC

  2. HLA

  3. Lac gene

  4. all of the above

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Correct Option: B

The best kidney transplant can be carried out when

biology excretion - the wastage disposing system artificial kidney kidney transplant disorders of kidney

  1. Blood group of donor matches with the recipient.

  2. HLA of donor matches with the recipient.

  3. Glomerular rate of filtration of a donor matches with the recipient.

  4. Both A and B.

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Correct Option: D

A father wants to donate his kidney to his son. Under which type of graft can be the father's kidney categorised?

biology excretion - the wastage disposing system artificial kidney kidney transplant disorders of kidney

  1. Isograft

  2. Xenograft

  3. Allograft

  4. Autograft

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Correct Option: C