Tag: features of a muscle

Quizzes (0) Questions (35)

Questions Related to features of a muscle

Multiple choice zoology skeleton and movements features of a muscle muscle features muscle contraction and its effects

During heavy exercise, we get cramps in the legs due to the accumulation of

  1. Carbon dioxide

  2. Lactic acid

  3. Alcohol

  4. Water
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • During heavy exercise, the demand for energy is high but the supply of oxygen to produce energy is limited. Therefore, anaerobic respiration takes places in the muscles cells to fulfil the demand for energy. This anaerobic breakdown of glucose leads to the formation of lactic acid in muscles. The accumulation of lactic acid in muscles leads to muscle cramps.
  • HenceDuring heavy exercise, we get cramps in the legs due to the accumulation of Lactic acid.
  • So, the correct answer is 'Lactic acid'.
Multiple choice zoology skeleton and movements features of a muscle muscle features muscle contraction and its effects

Glycogen is degraded to lactic acid by enzymes in muscles and liver when the animal is

  1. Exhausted

  2. Starved

  3. Killed

  4. Defaecated

  5. Copulated
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Glucose is the major source of energy in the body. excess glucose is stored in the form of glycogen in muscles and liver.
  • Most of the glycogen is stored in liver i.e 10 % of the mass of liver and the muscles contain a low amount of glycogen i.e 1% of the muscle mass.
  • When the glucose is completely utilized the animal feels exhausted, to overcome this the glycogen is degraded to lactic acid by enzymes in muscles and liver. 
  • So, the correct answer is 'Exhausted'.
Multiple choice zoology skeleton and movements features of a muscle muscle features muscle contraction and its effects

Muscles get fatigued due to accumulation of

  1. Adenosine triphosphate
  2. $CO _2$

  3. Lactic acid

  4. Phosphate molecules
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • The Burning of glucose during respiration requires oxygen. When a Muscle is subjected to continuous exercise there will be low availability of oxygen. This leads to the anaerobic breakdown of glucose which results in the formation of lactic acid. 
  • This accumulation of lactic acid in the muscle causes muscle fatigue.
  • Hence Muscles get fatigued due to the accumulation of lactic acid.
  • So, the correct answer is 'Lactic acid'.
Multiple choice zoology skeleton and movements features of a muscle muscle features muscle contraction and its effects

Rigor mortis in due to

  1. Depletion of ATP

  2. Excess ATP

  3. Excess availability of calcium

  4. Release of magnesium
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Regor mortis is one of the recognizable signs of death, caused by the depletion of ATP followed by the chemical changes in muscles after death, causing the body to stiffen and locked in place, making it difficult to move and manipulate.
  • When the ATP is depleted muscles can not contract and the body becomes stiff.
  • It takes about 2 days for rigor mortis to fade, and once it does, decay sets in.
  • Hence rigor mortis is due to depletion of ATP.
  • So, the correct answer is 'Depletion of ATP'.
Multiple choice zoology skeleton and movements features of a muscle muscle features muscle contraction and its effects

All or none law is not applicable for

  1. Single skeletal muscle fibre

  2. Whole skeletal muscle

  3. Single smooth muscle fibre

  4. Whole cardiac muscle
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • The all-or-none law is the principle that the strength by which a nerve or muscle fibre responds to a stimulus is independent of the strength of the stimulus. If that stimulus exceeds the threshold potential, the nerve or muscle fibre will give a complete response; otherwise, there is no response.
  • Hence All or none law is not applicable for whole skeletal muscle.
  • So, the correct answer is 'Whole skeletal muscle'.
Multiple choice zoology skeleton and movements features of a muscle muscle features muscle contraction and its effects

Lactic acid deposition leads to

  1. Tetany

  2. Muscle fatigue

  3. Muscle strain

  4. Convulsions
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • Generally, the glucose undergoes metabolism in the presence of oxygen to form ATP(adenosine triphosphate) which is essential for the muscle contraction but during vigorous exercise, the body cannot meet the oxygen demand and the glucose undergoes metabolism in the absence of oxygen which results in the formation and accumulation of lactic acid.
  • Feeling of fatigue after vigorous exercise for some time is due to the accumulation of lactic acid in muscles.
  • Hence lactic acid deposition leads to muscle fatigue.
  • So, the correct answer is 'Muscle fatigue'.
Multiple choice zoology skeleton and movements features of a muscle muscle features muscle contraction and its effects

All or none law is associated with

  1. Muscle fibre

  2. Neuron

  3. Uriniferous tubule

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • The all-or-none law is a principle that states that the strength of a response of a nerve cell(neuron) or muscle fibre is not dependent upon the strength of the stimulus. If a stimulus is above a certain threshold, a nerve or muscle fibre will fire.
  • Hence All or none law is associated with muscle fibre and neuron.
  • So, the correct answer is 'Both A and B'.
Multiple choice zoology skeleton and movements features of a muscle muscle features muscle contraction and its effects

In the anaerobic reaction of muscle, lactic acid is produced which causes painful tiredness. Where and by which mechanism lactic acid is catabolized?

  1. In muscle by monokinase action

  2. In muscle by Lohmans reaction

  3. In liver by Cori cycle

  4. In liver by phosphogen reaction
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
  • Generally, the glucose undergoes metabolism in the presence of oxygen to form ATP (Adenosine triphosphate) which is essential for the muscle contraction but during strenuous exercise, the body cannot meet the oxygen demand and the glucose undergoes metabolism in the absence of oxygen which results in the formation and accumulation of lactic acid.
  • This accumulated lactic acid is moved to the liver and converted into glycogen thorough Cori cycle.
  • Cori cycle takes place in the liver.
  • Hence In the anaerobic reaction of muscle, lactic acid is produced which causes painful tiredness. The lactic acid accumulated is catabolized by the mechanism of the Cori cycle in the liver.
  • So, the correct answer is 'In liver by Cori cycle'
Multiple choice zoology skeleton and movements features of a muscle muscle features muscle contraction and its effects

Lactic acid generated during muscle contraction is elaborated to form glycogen in

  1. Liver

  2. Pancreas

  3. Kidney

  4. Muscle
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Generally, the glucose undergoes metabolism in the presence of oxygen to form ATP(adenosine triphosphate) which is essential for the muscle contraction but during vigorous exercise, the body cannot meet the oxygen demand and the glucose undergoes metabolism in the absence of oxygen which results in the formation and accumulation of lactic acid.
  • This Lactic acid generated during muscle contraction is elaborated to form glycogen in Liver through Cori cycle.
  • So, the correct answer is 'Liver'.