Tag: movement and locomotion in man

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Questions Related to movement and locomotion in man

Multiple choice biology movement and locomotion in man types of muscles muscles muscles and their structure muscle contraction

Largest muscle of human body is

  1. Stapedium

  2. Quadriceps

  3. Gluteus maximus

  4. Masseter
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The gluteus maximus is the largest muscle in the human body. These muscles help move the hips and thighs and also keep the trunk of the body in upright position. These muscles work against the gravity when we are walking up stairs. So, the correct answer is 'Gluteus maximus'.

Multiple choice biology movement and locomotion in man types of muscles muscles muscles and their structure muscle contraction

Which of the following muscle types CNNOT be used valuntarily.

  1. Both striated and smooth

  2. Both cardiac and striated

  3. Both smooth and cardiac

  4. Cardiac,striated and smooth
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Smooth muscles (found in organs) and cardiac muscles (found in the heart) are involuntary. Striated (skeletal) muscles are voluntary.

Multiple choice biology movement and locomotion in man types of muscles muscles muscles and their structure

Which of these tissues is responsible for contractions that allow the movement of the body?

  1. Muscle

  2. Nervous

  3. Epithelial

  4. Connective
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Skeletal muscles are involved in contraction and relaxation. An action potential travels through the motor neuron. The motor neurons are linked to the muscle fibers at the neuromuscular junction. When this nervous signal reaches the neuromuscular junction the neurotransmitter called acetylcholine is released. This neurotransmitter binds to the receptors on the surface of the muscle fiber leading to muscular contraction. Thus the correct answer is option A.

Multiple choice biology movement and locomotion in man types of muscles muscles muscles and their structure

Standing on tip toe is an example of

  1. Elevation

  2. Flexion

  3. Extension

  4. Retraction
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • Joints are points of contact between bones, or between bones and cartilages.
  • Synovial joints are characterized by the presence of a fluid-filled synovial cavity between the articulating surfaces of the two bones. These joints help in locomotion and many other movements. The hinge joint is a type of synovial joint.
  • extension refers to movement in the posterior direction. For example, when standing up, the knees are extended.
  • Hence standing on tiptoe(HINGE JOINT AT ANKLE) is an example of an extension.
  • So, the correct answer is 'Elevation'.
Multiple choice biology movement and locomotion in man types of muscles muscles muscles and their structure

Which of the following muscles move the lower jaw, tongue and the head backward?

  1. Abductor

  2. Retractor

  3. Proctor

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
  • A muscle that draws a body part backward is called Retractor.
  • For example, The horizontal fibers of the temporalis muscle serve to retract the mandible(lower jaw).
  • Hence retractor muscles move the lower jaw, tongue and the head backward.
  • So,the correct answer is 'Retractor'.
Multiple choice zoology movement and locomotion in man structure of skeletal muscle muscles and their structure skeletal muscles

Which of the following is multinucleated?

  1. Nervous tissue

  2. Striated muscle

  3. Non-striated muscle

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

Multinucleate cells are those cells which have more than one nucleus per cell. Skeletal muscles or striated muscles are multinucleated cells. However, smooth muscles or non-striated muscles and cardiac muscles are mononucleated.  
Thus, the correct answer is 'Striated muscle.'

Multiple choice zoology movement and locomotion in man structure of skeletal muscle muscles and their structure skeletal muscles

On stimulation of skeletal muscle, calcium is immediately made available for binding to troponin from

  1. Blood

  2. Lymph

  3. Bone

  4. Sarcoplasmic reticulum
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
  • A neural signal reaching this junction releases a neurotransmitter (Acetylcholine) which generates an action potential in the sarcolemma. This spreads through the muscle fibre and causes the release of calcium ions into the sarcoplasm from the sarcoplasmic reticulum.
  • Active sites for myosin are present on actin which are masked by troponin-C in resting state. When Ca++ level increases it leads to the binding of calcium with a subunit of troponin i.e Troponin-C on actin(thin) filaments and thereby remove the masking of active sites for myosin.
  • Hence on stimulation of skeletal muscle, calcium is immediately made available for binding to troponin from sarcoplasmic reticulum.
  • So, the correct answer is 'Sacroplasmic reticulum'.
Multiple choice zoology movement and locomotion in man structure of skeletal muscle muscles and their structure skeletal muscles

Read the following statements carefully and select the correct ones. 


(i) Cardiac fibres are branched with one or more nuclei.
(ii) Smooth muscles are unbranched and cylindrical. 
(iii) Skeletal muscles can be branched or unbranched.
(iv) Smooth muscles are non-striated.

  1. Only (iv)

  2. (ii) and (iii)

  3. (iii) and (iv)

  4. Only (iii)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Smooth muscles are indeed non-striated, while the other statements contain inaccuracies (e.g., cardiac fibers are branched but typically have a single nucleus, and skeletal muscles are always striated).

Multiple choice zoology movement and locomotion in man structure of skeletal muscle muscles and their structure skeletal muscles

The cytoplasm in the muscle fibre is called as

  1. Sarcoplasm

  2. Sarcolemma

  3. Neuroplasm

  4. Nucleoplasm
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The cytoplasm in the muscle fibre is called as sarcoplasm. Sarcolemma is the sheath or cell membrane present around the striated muscle fibre. The cytoplasm in the nerve cells is called as neuroplasm. The cytoplasm in the nucleus of the cell is called as necleoplasm. 

Thus, the correct answer is 'Sarcoplasm.'