Tag: skeletal muscles

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Questions Related to skeletal muscles

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

Behaviour that involves an external stimulus triggering a genetically determined response is called as

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The fixed action patterns to specific stimuli which activate nervous system making the muscular action without any involvement of brain in decision making are known as innate behaviours. Being genetically determined, these responses are nearly alike in all members of a population. 

Learning (learned behaviour) is a modification of innate behaviour as a result of specific experiences and involves the formation of memories by changes in neural connectivity.
A form of learning that occurs during a brief genetically determined critical period shortly after birth is called as imprinting. 
Conditioned is also a learned response in which stimulus becomes associated with a consequence. 
Hence, the correct answer is option A.

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

Hunger is

  1. External stimuli

  2. Internal stimuli

  3. Response

  4. Both A and B
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

Which of the following is called as stimulus?

  1. Light

  2. Temperature

  3. Sound

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

A stimulus for the olfactory receptor is 

  1. Taste

  2. Smell

  3. Touch

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

Example of stimulus is

  1. Hunger

  2. Sadness

  3. Ache

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

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

  1. Sensitivity

  2. Homeostasis

  3. Metabolism

  4. None of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.
Multiple choice biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

Nociceptors detect

  1. Change in temperature

  2. Touch and pressure

  3. Light

  4. Tissue damage
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice biology neural control and coordination structure of muscle skeletal muscles locomotion and movements

Receptors to both touch and pressure are called as 

  1. Thermoreceptors

  2. Mechanoreceptors

  3. Chemoreceptors

  4. Phonoreceptors
Reveal answer Fill a bubble to check yourself
B Correct answer
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'.
Multiple choice zoology movement and locomotion in man structure of skeletal muscle muscles and their structure skeletal muscles

Which of the following is multinucleated?

  1. Nervous tissue

  2. Striated muscle

  3. Non-striated muscle

  4. None of these
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Multinucleate cells are those cells which have more than one nucleus per cell. Skeletal muscles or striated muscles are multinucleated cells. However, smooth muscles or non-striated muscles and cardiac muscles are mononucleated.  
Thus, the correct answer is 'Striated muscle.'

Multiple choice zoology movement and locomotion in man structure of skeletal muscle muscles and their structure skeletal muscles

On stimulation of skeletal muscle, calcium is immediately made available for binding to troponin from

  1. Blood

  2. Lymph

  3. Bone

  4. Sarcoplasmic reticulum
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • A neural signal reaching this junction releases a neurotransmitter (Acetylcholine) which generates an action potential in the sarcolemma. This spreads through the muscle fibre and causes the release of calcium ions into the sarcoplasm from the sarcoplasmic reticulum.
  • Active sites for myosin are present on actin which are masked by troponin-C in resting state. When Ca++ level increases it leads to the binding of calcium with a subunit of troponin i.e Troponin-C on actin(thin) filaments and thereby remove the masking of active sites for myosin.
  • Hence on stimulation of skeletal muscle, calcium is immediately made available for binding to troponin from sarcoplasmic reticulum.
  • So, the correct answer is 'Sacroplasmic reticulum'.