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Test: Types of Movement & Muscle - NEET MCQ


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10 Questions MCQ Test Biology Class 11 - Test: Types of Movement & Muscle

Test: Types of Movement & Muscle for NEET 2024 is part of Biology Class 11 preparation. The Test: Types of Movement & Muscle questions and answers have been prepared according to the NEET exam syllabus.The Test: Types of Movement & Muscle MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Types of Movement & Muscle below.
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Test: Types of Movement & Muscle - Question 1

Which bone is commonly known as the collar bone?

Detailed Solution for Test: Types of Movement & Muscle - Question 1

The clavicle is commonly called the collar bone. It articulates with the acromion of the scapula to form part of the shoulder joint.

Topic in NCERT: Clavicle

Line in NCERT: "This bone is commonly called the collar bone."

Test: Types of Movement & Muscle - Question 2

Which of the following statements about the mechanism of muscle contraction are correct?

A. Acetylcholine is released when the neural signal reaches the motor end plate.

B. Muscle contraction is initiated by a signal sent by CNS via a sensory neuron.

C. During muscle contraction, the isotropic band gets elongated.

D. Repeated activation of the muscle can lead to accumulation of lactic acid.

Detailed Solution for Test: Types of Movement & Muscle - Question 2

Following are the correct statements about the mechanism of muscle contraction: 
(i) Acetylcholine is released when the neural signal reaches the motor end plate.
(ii) Repeated activation of the muscles can lead to lactic acid accumulation.
So, the correct answer is (B).

Topic in NCERT: Muscle contraction mechanism

Line in NCERT: "Muscle contraction is initiated by a signal sent by the central nervous system (CNS) via a motor neuron." "Repeated activation of the muscles can lead to the accumulation of lactic acid due to anaerobic breakdown of glycogen in them, causing fatigue." "A neural signal reaching this junction releases a neurotransmitter (Acetyl choline) which generates an action potential in the sarcolemma."

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Test: Types of Movement & Muscle - Question 3

The contractile unit of muscle is a part of myofibril between

Detailed Solution for Test: Types of Movement & Muscle - Question 3

The region between two Z lines is called a sarcomere; sarcomeres can be considered the primary structural and functional unit of muscle tissue. Ultrastructure of a group of myofibrils, showing the sarcoplasmic reticulum and transverse tubules, which constitute the two membrane systems within a muscle fibre.

Topic in NCERT: Sarcomere

Line in NCERT: "The portion of the myofibril between two successive 'Z' lines is considered as the functional unit of contraction and is called a sarcomere."

Test: Types of Movement & Muscle - Question 4

Read the statements carefully and comment on them.

A. A bands of muscle fibre are dark and contain myosin.

B. I bands of muscle fibre are light and contain actin.

C. During muscle contraction, the A bands contract.

D. The part between two Z lines is called sarcomere.

E. The central part of the thin filament not overlapped by the thick filament is the H zone.

Detailed Solution for Test: Types of Movement & Muscle - Question 4

A. A bands of muscle fibre are dark and contain myosin.

  • This statement is correct. The A bands are the darker areas of the sarcomere in muscle fibers that contain the thick filaments, primarily composed of the protein myosin.

B. I bands of muscle fibre are light and contain actin.

  • This statement is correct. The I bands are the lighter areas that contain the thin filaments, which are primarily composed of the protein actin.

C. During muscle contraction, the A bands contract.

  • This statement is incorrect. During muscle contraction, the A bands do not shorten; rather, it is the I bands that shorten while the A bands stay the same length. What actually happens is that the thin filaments slide past the thick filaments, shortening the sarcomere.

D. The part between two Z lines is called sarcomere.

  • This statement is correct. A sarcomere is the segment of a myofibril between two Z lines, which is the functional unit of muscle contraction.

E. The central part of the thin filament not overlapped by the thick filament is the H zone.

  • This statement is incorrect. The H zone is the central part of the A band where there is no overlap of thin filaments (actin). During muscle contraction, the H zone becomes narrower as the actin slides over the myosin.

Based on the evaluation above, the correct statements are A, B, and D, while C and E are incorrect.

Topic in NCERT: Structure of contractile proteins

Line in NCERT: "A detailed study of the myofibril has established that the striated appearance is due to the distribution pattern of two important proteins – Actin and Myosin. The light bands contain actin and is called I-band or Isotropic band, whereas the dark band called 'A' or Anisotropic band contains myosin. The portion of the myofibril between two successive 'Z' lines is considered as the functional unit of contraction and is called a sarcomere."

Test: Types of Movement & Muscle - Question 5

 Which category of muscle does not get tetanised?

Detailed Solution for Test: Types of Movement & Muscle - Question 5

Cardiac muscle (also called heart muscle or myocardium) is one of three types of vertebrate muscles, with the other two being skeletal and smooth muscles. It is an involuntary, striated muscle that constitutes the main tissue of the walls of the heart.

Test: Types of Movement & Muscle - Question 6

Which of the following statements about the human skeletal system is correct?

Detailed Solution for Test: Types of Movement & Muscle - Question 6

The human skeletal system has 206 bones. The axial skeleton includes the skull, vertebral column, sternum, and ribs. The skull consists of 22 bones (8 cranial and 14 facial)

Topic in NCERT: Skeletal system

Line in NCERT: "The skull is composed of two sets of bones - cranial and facial, that totals to 22 bones."

Test: Types of Movement & Muscle - Question 7

ATPase enzyme needed for muscle contraction is located in

Detailed Solution for Test: Types of Movement & Muscle - Question 7

During muscular contraction myosin cross bridges heads. Myosin is not only an actin binding protein, it is also an ATPase (an enzyme) which is activated by Ca2+ and Mg2+ ions. Hence, ATPase enzyme is located in myosin.

Topic in NCERT: Myosin head

Line in NCERT: "The globular head is an active ATPase enzyme and has binding sites for ATP and active sites for actin."

Test: Types of Movement & Muscle - Question 8

The only immediate source of energy for muscular contraction is

Detailed Solution for Test: Types of Movement & Muscle - Question 8

Adenosine Triphosphate (ATP) is the immediate source of (chemical) energy for muscle contraction. Very little ATP is stored in muscle fibres (= 'muscle cells'), only enough to power muscle contractions for a few seconds. The ATP in muscles must be constantly replenished as it is used for various processes.

Topic in NCERT: ATP

Line in NCERT: "Utilising the energy from ATP hydrolysis, the myosin head now binds to the exposed active sites on actin to form a cross bridge."

Test: Types of Movement & Muscle - Question 9

Which one of the following is the correct pairing of a body part and the kind of muscle tissue which moves it?

Detailed Solution for Test: Types of Movement & Muscle - Question 9

Smooth muscles are plain, non- striated, involuntary or unstriped muscles due to the absence of striations. These occur in the walls of hollow internal organs, in capsules of lymph glands, spleen etc, in iris and ciliary body of eyes, skin dermis, penis and other accessory genitalia etc. 

Test: Types of Movement & Muscle - Question 10

During contraction of muscle fibers which of the following does not happen?

Detailed Solution for Test: Types of Movement & Muscle - Question 10

During shortening of the muscle, i.e., contraction, the ‘I’ bands get reduced, whereas the ‘A’ bands retain the length 

  • Calcium Release: Calcium ions are released into the sarcoplasm.
  • Troponin Binding: Calcium binds to troponin on actin filaments, exposing the active sites for myosin.
  • Cross Bridge Formation: Myosin heads bind to the exposed active sites on actin, forming cross bridges.
  • Filament Sliding: Utilizing energy from ATP hydrolysis, myosin heads pull actin filaments towards the center of the 'A' band, leading to the contraction of the sarcomere.
  • Sarcomere Shortening: The 'I' bands shorten, while the 'A' bands retain their length, resulting in muscle contraction.
     
Topic in NCERT: Muscle contraction process

Line in NCERT: "It is clear from the above steps, that during shortening of the muscle, i.e., contraction, the 'I' bands get reduced, whereas the ‘A' bands retain the length."

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