Locomotion and Movement Test

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Locomotion and Movement Test - 1

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following statements is/are incorrect about sliding filament theory of muscle contraction?

A
during contraction width of I and A bands remain the same.

B
during contraction Z lines come closer to together.

C
during contraction width of H zone decreases.

D
both A & B

Solution

Explanation:

During contraction, the ‘I’ bands get reduced, whereas the ‘A’ bands retain the length.
Question 2
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Read the following statements about muscle contraction in humans :

i. chemical energy is converted into mechanical energy during muscle contraction and the chemical is a neurotransmitter.
ii. a neurotransmitter acetylcholine at motor end plate converts electrical energy into mechanical energy.
iii. in a contracted muscle, volume remains the same.
iv. a contracted muscle becomes shorter and thicker.

A
onlyi) and iv) are correct.

B
only ii), iii) and iv) are correct.

C
only i), iii) and iv) are correct.

D
only iv) is correct.

Solution

Explanation:

The chemical energy is converted into mechanical energy during muscle contraction and the chemical is a neurotransmitter. In a contracted muscle, volume remains the same and a contracted muscle becomes shorter and thicker.
Question 3
1 / -0

Myoglobin is found to be :

i. highly abundant in muscles of whales and seals .
ii. exhibiting cooperative binding of oxygen.
iii. allowing organisms to hold their breathe longer underwater.

A
all statements are correct.

B
only ii) is correct.

C
onlyi) and ii) are correct.

D
only i) and iii) are correct.

Solution

Explanation:

Myoglobin is found to be highly abundant in muscles of whales and seals. Myoglobin being oxygen and iron binding protein allowing organisms to hold their breathe longer underwater.
Question 4
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The property which doesn’t belong to muscle fibres is :

A
Contractility

B
elasticity

C
Excitability

D
conductivity

Solution

Explanation:

Muscle fibres have properties of excitability, elasticity and contractility but conductivity is not present in muscles fibers. These fibres help in movement of different body parts.
Question 5
1 / -0

A meromyosin molecule doesn’t contain :

A
trunk

B
arm

C
tail

D
head

Solution

Explanation:

Each meromyosin has two important parts, a globular head with a short arm and a tail.
Question 6
1 / -0

A functional G-Actin molecule in its free state is bound to :

A
mangnese ion and ATP

B
Calcium ion and ATP

C
magnesium ion and ATP

D
sodium ion and ATP

Solution

Explanation:

A functional G-actin molecule in its free state is bound to magnesium ion and ATP. G-actin molecule forms a bridge between the muscle fibres for sliding.
Question 7
1 / -0

Muscles are attached to bones via :

A
Joints

B
Screw

C
Ligament

D
tendon

Solution

Explanation:

Muscles are attached to bones by tendon and bones are attached with another bone by ligaments. Tendon and ligaments are types of connective tissue.
Question 8
1 / -0

Discovery of actin is credited to

A
John Kendren

B
Halliburton

C
Pollard and Korn

D
Straub

Solution

Explanation:

Actin and myosin filaments are responsible for contraction and relaxation of muscle. The discovery of actin is credited to Straub.
Question 9
1 / -0

The correct organisation of skeletal muscle is

A
fascia → muscle cells → myofibrils → sarcomere

B
muscle bundles → myofibrils → muscle cells → sarcomere

C
fascicles → muscle fibres → myofilaments → sarcomere

D
muscle bundles → muscle cells → muscle fibres → sarcomere

Solution

Explanation:

Each organised skeletal muscle in our body is made of a number of muscle bundles or fascicles held together by a common collagenous connective tissue layer called fascia. Each muscle bundle contains a number of muscle fibres. A characteristic feature of the muscle fibre is the presence of a large number of parallelly arranged filaments in the sarcoplasm called myofilaments or myofibrils. The portion of the myofibril between two successive ‘Z’ lines is considered as the functional unit of contraction and is called a sarcomere.
Question 10
1 / -0

Study of muscles is called :

A
Musclogy

B
Sarcology

C
Mycology

D
myology

Solution

Explanation:

Myology is the study of the muscular system, including the study of the structure, function and diseases of muscle.

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Locomotion and Movement Test - 1

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Locomotion and Movement Test - 1

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Question 1

during contraction width of I and A bands remain the same.

during contraction Z lines come closer to together.

during contraction width of H zone decreases.

both A & B

Solution

Question 2

onlyi) and iv) are correct.

only ii), iii) and iv) are correct.

only i), iii) and iv) are correct.

only iv) is correct.

Solution

Question 3

all statements are correct.

only ii) is correct.

onlyi) and ii) are correct.

only i) and iii) are correct.

Solution

Question 4

Contractility

elasticity

Excitability

conductivity

Solution

Question 5

trunk

arm

tail

head

Solution

Question 6

mangnese ion and ATP

Calcium ion and ATP

magnesium ion and ATP

sodium ion and ATP

Solution

Question 7

Joints

Screw

Ligament

tendon

Solution

Question 8

John Kendren

Halliburton

Pollard and Korn

Straub

Solution

Question 9

fascia → muscle cells → myofibrils → sarcomere

muscle bundles → myofibrils → muscle cells → sarcomere

fascicles → muscle fibres → myofilaments → sarcomere

muscle bundles → muscle cells → muscle fibres → sarcomere

Solution

Question 10

Musclogy

Sarcology

Mycology

myology

Solution

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