Tag: zoology

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Questions Related to zoology

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

Muscle fibres that show, presence of well developed sarcoplasmic reticulum and are easily fatigued during exercise are likely to be in close association with

  1. Limb bones

  2. Wall of intenstine

  3. Heart

  4. Wall of fallopian tube
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Skeletal muscles show muscle fibres having well developed sarcoplasmic reticulum these muscles are easily fatigued during exercise. Skeletal muscles show voluntary movements.  These can be found in close association with limb bones.

So, the correct answer is 'Limb bones'.

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

Muscles, which are immune to fatigue, are

  1. Striped muscles

  2. Cardiac muscles

  3. Jaw muscles

  4. Skeleton muscles
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The internal movements are performed by the involuntary muscles. The involuntary muscles function on their own and cannot be controlled willingly. The cardiac muscles are the involuntary muscles which are responsible for the pumping of the heart. The heart pumps and supplies the oxygenated blood to the different tissues in the body. The smooth muscles are responsible for carrying out peristalsis in the tube like structures of the alimentary canal.

Thus, the correct answer is option B. 

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

Which of the following type of muscles are not fatigued soon?

  1. Cardiac muscle

  2. Smooth muscle

  3. Voluntary muscle

  4. Both A and B
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The correct option is D.

Cardiac and smooth muscle are not fatigued soon. Muscle fatigue is a symptom that decreases our muscles ability to perform overtime. 
Cardiac muscles, In smooth muscle myosin, the rate of ATPase activity is 10 to 100 slower than in skeletal muscle myosin. 

It must also be noted that nerve stimulation can cause a excitation or inhibition of the muscle cell.

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

Feeling of fatigue after running fast for some time is due to

  1. Loss of energy

  2. Accumulation of lactic acid in muscles

  3. Formation of succinic acid

  4. Formation of biuret crystals
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 running fast for some time is due to the accumulation of lactic acid in muscles.
  • So, the correct answer is 'Accumulation of lactic acid in muscles'.
Multiple choice zoology skeleton and movements features of a muscle muscle features muscle contraction and its effects

Anaerobic breakdown of glycogen due to repeated activation of muscles leads to accumulation of

  1. Uric acid

  2. Phenylalanine

  3. Lactic acid

  4. Glutamic acid

  5. Tyrosine
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The body prefers to generate most of its energy using aerobic methods. During physical exercise such as lifting heavy weights, energy production is faster than our bodies can adequately deliver oxygen. In those cases, the working muscles generate energy anaerobically. This energy comes from glucose through a process called glycolysis, in which glucose is broken down or metabolized into a substance called pyruvate. When the body has plenty of oxygen, pyruvate is shuttled to aerobic pathway to be further broken down for more energy. But when oxygen is limited, the body temporarily converts pyruvate into a substance called lactate and accumulates in the muscle. 

So, the correct answer is 'Lactic acid'.