Tag: coordination

Quizzes (18) Questions (96)

Questions Related to coordination

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

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

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

The functional unit of contractile system in a striated muscle is 

  1. sarcomere

  2. Z-band

  3. cross bridges

  4. myofibril
Reveal answer Fill a bubble to check yourself
A Correct answer
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'.

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

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. 

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

Myosin filaments are thick and are made up of small units called meromyosin. Each meromyosin globular head with short arm called ____________.

  1. Heavy meromyosin

  2. Light meromycin

  3. Both a and b

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

Myosin molecules consist of heavy meromyosin (the globular head with short arm) and light meromyosin (the rod-like tail). The heavy meromyosin head contains the ATPase activity and actin-binding site crucial for muscle contraction. Option B incorrectly spells meromyosin as meromycin (an antibiotic compound), making Option A the correct choice.

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

Which of the.following statements are correct regarding muscle proteins ?
 (i) Actin is a thin filament and is Frock up of two F-actirs.
(ii) The complex protein, tropomyosin is distributed at regular intervals on the troponin. 
(iii)  Myosin is a thick flament which is also a polymerised protein. 
(iv) The globular head of meromyosin consists of light merornyosin (LMM).

  1. (i), (ii) and (iii)

  2. (i), (ii) and (iv)

  3. (i) and (iii)

  4. (ii) and (iv)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Actin is the thin filament in the sarcomere, comprising F-actin, tropomyosin and troponin protein, troponin is attached to tropomyosin, while myosin is a thick filament.

So, the correct option is '(i), (ii) and (iii)'.

Multiple choice zoology coordination introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

What is the main function of endocrinal system in animals?

  1. Coordination

  2. Combination

  3. Regulatory

  4. None of the given
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The function of endocrine glands in animals is to regulate chemical coordination. These glands secrete chemicals called hormones. 

So, the correct option is 'Coordination'.

Multiple choice zoology coordination introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

Endocrine glands are also called as ................. glands.

  1. Exocrine

  2. Ductless

  3. Ducted

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

Endocrine glands are glands of the endocrine system that secrete their products, hormones, directly into the blood rather than through a duct. So, they are called as ductless glands. 

The major glands of the endocrine system include the pineal gland, pituitary gland, pancreas, ovaries, testes, thyroid gland, parathyroid gland, hypothalamus and adrenal glands.

Multiple choice zoology coordination introduction to human endocrine system endocrine system and hormone coordination in human beings- chemical control

Endocrine glands

  1. Do not possess ducts

  2. Sometimes do not have ducts

  3. Pour their secretion into blood through ducts

  4. Always have ducts
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Any of various glands producing hormonal secretions that pass directly into the bloodstream is called endocrine gland. The endocrine glands include the thyroid, parathyroids, anterior and posterior pituitary, pancreas, adrenals, pineal and gonads. They are also called as the ductless glands.