Tag: locomotion and movements

Questions Related to locomotion and movements

Which of the following is correct statement for white muscle fibre?

zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

  1. It contains low amount of haemoglobin and mitochondria.

  2. It contains higher amount of myoglobin.

  3. It contains low amount of myoglobin and mitochondria.

  4. It possesses only actin type of protein.

Show answer
Correct Option: C
Explanation:
  • Muscle is a  bundle of fibrous tissue in a body that has the ability to contract, producing movement in or maintaining the position of parts of the body.
  • The total number of muscles in the human body comes in the range of 640-850.
  • Muscles appear in red colour due to a pigment called myoglobin. It receives oxygen from the red blood cells and transports it to the mitochondria of muscle cells, where the oxygen is used in cellular respiration to produce energy. 
  • Muscle fibres are named as white muscle fibres because It contains a low amount of myoglobin and mitochondria.compared to red muscle fibres.
  • So, the correct answer is 'It contains a low amount of myoglobin and mitochondria'.

The slow twitch muscle fibres which are rich in myoglobins and have abundant mitochondria are:

zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

  1. white skeletal muscles

  2. cardiac muscles

  3. red skeletal muscles

  4. involuntary muscles

Show answer
Correct Option: A
Explanation:

The slow twitch muscle fibres which are rich in myoglobins and have abundant mitochondria are 'white skeletal muscles'.

Identify from the following list, the characteristics of red muscles (A) and white muscles (B) and select the option that correctly segregates the characters.
(i) Less number of mitochondria
(ii) More number of mitochondria
(iii) Sarcoplasmic reticulum is abundant
(iv) Myoglobin content high
(v) Sarcoplamic reticulum moderate
(vi) Aerobic muscles
(vii) Depend on anaerobic respiration. for energy
(viii) Less myoglobin content 

zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

  1. (i), (iii), (vii), (viii) (ii), (iv), (v), (vi)

  2. (ii), (iv),(vi), (v),(i), (vii), (viii),(iii)

  3. (i), (iii), (iv), (vii) (ii), (v), (vi), (viii)

  4. (ii), (v), (vi), (viii) (i), (iii), (iv), (vii)

Show answer
Correct Option: B

Match the following and mark correct option:

Column I Column II
A. Fast muscle fibres (i) Myoglobin
B. Slow muscle fibres (ii) Lactic acid
C. Actin filament (iii) Contractile unit
D. Sarcomere (iv) I-band 
zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

  1. A-(i), B-(ii), C- (iv), D- (iii)

  2. A-(ii), B-(i), C - (iii), D- (iv)

  3. A-(ii), B-(i), C - (iv), D- (iii)

  4. A-(iii), B-(ii), C - (iv), D- (i)

Show answer
Correct Option: C
Explanation:
The sarcomere is known as the ultimate unit of contraction. It is made up of actin and myosin filament.
Actin filaments are the ones that are also known as the thin filament and forms the isotropic part in the sarcomere.
Few fast muscle fibres are the ones that are present in the type of runners that runs for a short amount of time. They have high glycogen content and lactic acid contained in them because of anaerobic respiration and muscle fatigue.
Slow muscle fibre is found in those runners that need to have long and sturdy run. They have a high number of mitochondria and myoglobin because they need continuous ATP production or a large amount of time.
So, the correct option is 'A-(ii), B-(i), C - (iv), D- (iii)'



Which of the following correctly characterises a "fast-oxidative" type of skeletal muscle fibre?

zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

  1. Few mitochondria and high glycogen content

  2. Low myosin ATPase rate and few surrounding capillaries

  3. Low glycolytic enzyme activity and intermediate contraction velocity

  4. High myoglobin content and intermediate glycolytic enzyme activity

Show answer
Correct Option: A
Explanation:

Fast oxidative type of muscle fibres is generally found in the sprinters that need to run for a short amount of time. They do not need to have a very large number of mitochondria for continuous ATP production but they do need to have speed. So in such muscle fibres, there is a high glycogen content which is converting into lactic acid rapidly and fatigue is caused more early.

So, the correct option is 'Few mitochondria and high glycogen content'

Which of the following match is incorrect?

zoology musculo-skeletal system red and white muscle types of muscle fibres locomotion and movements

  1. Red muscle - Large amount of mitochondria

  2. White muscle - Fight muscles of the birds

  3. Smooth muscle - Innervated by autonomous nervous system

  4. Cardiac muscle - Abundant blood supply

Show answer
Correct Option: B
Explanation:

Red muscles contain a large amount of mitochondria as it requires large amount of energy. White muscles contain fewer mitochondria. Pectoralis major is the flight muscles of the birds. It helps birds to flight. It is a red muscle. The autonomic nervous system is involuntary. It controls cardiac and smooth muscles, glands and blood vessels. Cardiac muscle has abundant blood supply. It extracts approximately 75% of the oxygen from blood in the left ventricle. 

Thus, the correct answer is 'White muscle - Fight muscles of the birds.'

Match column I with column, option from. the codes given below:

Column I Column II
A. Structural and functional -unit of a myofibril (i) H-zone
B. Protein of thin filament (ii) Myosin
C. Protein of thick filament (iii) Sarcomere
D. The central part of thick filament not overlapped by thin filament (iv) Actin
biology locomotion and movements structure of muscle skeletal muscles coordination

  1. A-(i), B-(ii), C,(iii), D-(iv)

  2. A-(i), B-(iii), C-(ii), D-(iv)

  3. A-(i), B-(iv), C-(iii), D-(ii)

  4. A-(iii),B-(iv), C-(ii), D-(i)

Show answer
Correct Option: D
Explanation:

 A. Structural and functional -unit of a myofibril - (iii) Sarcomere

B. Protein of thin filament - (iv) Actin

C. Protein of thick filament - (ii) Myosin

D. The central part of thick filament not overlapped by thin filament - (i) H-zone

So, the correct answer is 'A-(iii),B-(iv), C-(ii), D-(i)'.

Dark bands are :

biology locomotion and movements structure of muscle skeletal muscles coordination

  1. A-band

  2. B-band

  3. I-band

  4. Z--line

Show answer
Correct Option: A
Explanation:
A-bands in muscles are the dark bands that are located in the regions where thick myosin filaments are present.
So, the correct answer is 'A-band'.

The functional unit of contractile system in a striated muscle is 

biology locomotion and movements structure of muscle skeletal muscles coordination

  1. sarcomere

  2. Z-band

  3. cross bridges

  4. myofibril

Show answer
Correct Option: A
Explanation:

The sarcomeres are fibrous protein filaments that slide past one another when the muscle contracts or relaxes. It is basically the region between two Z-bands. It is also the functional unit of the contractile system in a striated muscle.

So, the correct answer is 'sarcomere'.

Read the given statements and select the correct option.
Statement 1 : A primary myofilament is composed of a bundle of rod-like molecules of a protein myosin.
Statement 2 : Myosin and actin together form a contractile apparatus. 

biology locomotion and movements structure of muscle skeletal muscles coordination

  1. Both statements 1 and 2 are correct.

  2. Statement 1 is correct but statement 2 is incorrect.

  3. Statement 1 is incorrect but statement 2 is correct.

  4. Both statements 1 and 2 are incorrect.

Show answer
Correct Option: A
Explanation:
Both the statements given in the question are correct as a primary myofilament is composed of a bundle of rod-like molecules of a protein myosin and myosin and actin together form a contractile apparatus.
So, the correct answer is '
Both statements 1 and 2 are correct.'