Locomotion and Movement Test

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Locomotion and Movement Test - 52

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Weekly Quiz Competition

Question 1
1 / -0

Which one of the following pairs of chemical substances is correctly categorized?

A
Calcitonin and thymosin - Thyroid hormones

B
Pepsin and prolactin - Two digestive enzymes secreted in stomach

C
Troponin and myosin - Complex proteins in striated muscles

D
Secretin and rhodopsin - Polypeptide hormones

Solution

Troponin and myosin are the proteins of striated muscles. They help in muscle contraction.
Thymosin is the hormone released from thymus and helps in stimulating the growth of certain immune cells. Calcitonin is also a hormone released from parafollicular cells of the thyroid gland.
Prolactin is a hormone released by the pituitary gland. Pepsin is a protein-digesting hormone secreted in the stomach.
Rhodopsin is a derivative of vitamin D. Secretin a hormone released into the bloodstream by the duodenum (especially in response to acidity) to stimulate secretion by the liver and pancreas.
So the correct option is C.
Question 2
1 / -0

The important muscle proteins that help in movement are

A
Actin and myosin

B
Tropomyosin

C
Troponin

D
All of these

Solution

Actin and myosin are the structural filaments that play the main role in muscle contraction by sliding filament theory.
Troponin and tropomyosin are the regulatory proteins that regulate the rate of attachment of myosin heads to actin. Hence they also play an important role in muscle contraction and its movement.
Troponin regulate availability of active sites of actin by attaching with Ca++
So the correct option is D.
Question 3
1 / -0

Select the correct statement regarding the specific disorder of muscular or skeletal system.

A
Osteoporosis - decrease in bone mass and higher chances of fractures with advancing age

B
Myasthenia gravis- auto immune disorder which inhibits sliding of myosin filaments

C
Gout - inflammation of joints due to extra deposition of calcium

D
Muscular dystrophy - age related shortening of muslces

Solution

correct option is A.
Osteoporosis is bone disorder in which the Ca++ is decreased resulting in decreased bone mass. This may lead to fractures.

Myasthenia gravis is an auto immune disorder in which auto antibodies are formed against the acetylcholine receptors on the muscle plate. Due to decreased stimulation of muscle it undergoes wasting.

Gout is an inflammatory condition of the joints caused due to deposition of uric acid crystals.

Muscular dystrophy is a genetic disorder causing progressive weakness and loss of muscle mass.
Question 4
1 / -0

Which one of the following is correctly matched?

List I
A Cytosine, uracil, thiamine
B Malleus, incus, cochlea
C Ilium, ischium, pubis
D Actin, myosin, rhodopsin

List II
1 Pyrimidines
2 Ear ossicles
3 Coxal bones of the pelvic girdle
4 Muscle proteins

A
A

B
B

C
C

D
D
Solution
- Pelvic girdle consists of two coxal bones. Each coxal bone is formed by the fusion of three bones – ilium, ischium and pubis.
- At the point of fusion of the above bones is a cavity called acetabulum to which the thigh bone articulates.
- Hence ilium, ischium, pubis are coxal bones of the pelvic girdle.
- So, the correct answer is 'C'
Question 5
1 / -0

The term tetanus refers to

A
The partial sustained contraction of major supporting muscles

B
A stronger contraction resulting from multiple motor unit summation

C
The result of wave summation, which produces a smooth and sustained contraction of a muscle

D
The state of muscle fatigue caused by depletion of ATP and accumulation of lactic acid
Solution
- A decline in a muscle's ability to maintain a constant level of force, or tension after prolonged, repetitive stimulation is called tetanus.
- A tetanic contraction is a sustainable contraction evoked when motor nerve innervates a skeletal muscle emitting action potential at a very high rate.
So, the correct option is 'The result of wave summation, when produces a smooth and sustained contraction of a muscle'.
Question 6
1 / -0

Label the correct part of the Myosin monomer.

A
(i) Actin binding site (ii) Head (iii) ATP binding site (iv) Cross arm

B
(i) Cross arm (ii) Actin binding site (iii) Head (iv) ATP binding site

C
(i) ATP binding site (ii) Actin binding site (iii) Head (iv) Cross arm

D
(i) Head (ii) Cross arm (iii) Actin binding site (iv) ATP binding site

Solution

The globular part of the myosin is called Head. It helps to form cross-bridges by attaching with actin.
The middle oblique structure that connects head and tail of myosin is the neck. Head and neck together called as Cross arm. They are responsible for forming cross bridges and help in wilding of actin over myosin.
The topmost area on the head of the myosin is the actin-binding site. This site helps in attachment of myosin to actin.
ATP binding site is present anteriorly below actin binding site. This site attaches to the ATP and forms ADP. The energy is used for sliding of cross bridges.
So the correct option is D.
Question 7
1 / -0

The globular head of myosin contains

A
Calcium ions in large quantities.

B
Troponin.

C
ATPase enzyme.

D
ATP.

Solution

Globular head of myosin contains an ATPase enzyme that along with $$CO^{2+}$$ and $$mg^{2+}$$ ions catalyses the breakdown of ATP during muscle contraction. If also has binding site for ATP and active sites for actin.
Question 8
1 / -0

During forced expiration, actively contracting muscles include the

A
diaphragm

B
internal intercostals

C
abdominal muscles

D
all of these

Solution

Relaxation of the diaphragm and the inter intercostal muscle returns the diaphragm and sternum to their normal position and reduce the thoracic volume and thereby the pulmonary volume.
This leads to an increase in the intrapulmonary pressure to slightly about atmospheric pressure and causes the expulsion of air from the lungs.
The abdominal muscles help in increasing the strength of expiration.
So, the correct option is 'all of these'
Question 9
1 / -0

Osteoporosis, an age-related disease of skeletal system, may occur due to the.

A
Immune disorder affecting neuromuscular junction leading to fatigue

B
High concentration of $$Ca^{++}$$ and $$Na^+$$

C
Decreased level of oestrogen

D
Accumulation of uric acid leading to inflammation of joints

Solution

Osteoporosis is an age related disorder of skeletal system caused due to weakening of bones by decreased Ca++ and oestrogen levels. Osetrogen helps in decreasing the resorption of bone by decreasing osteoclastic activity. As the oestrogen levels decrease the osteoclastic activity increases and more ca++ is withdrawn into blood from bone resulting in osteoporosis.
So the correct option is C.
Question 10
1 / -0

Gliding joint is present between the

A
Carpals

B
Humerus and pectoral girdle

C
Carpal and metacarpal of thumb

D
Knee

Solution

Gliding joint is the type of joint between the carpal bones. This type of joint is also present in tarsal bones and vertebrae. This joint helps in free movement bones one over the other.
The joint between the humerus and pectoral girdle is ball and socket joint.
The joint between carpal and metacarpal of thumb is saddle joint.
The joint found in the knee is the hinge joint.
So the correct option is A.

List I
A	Cytosine, uracil, thiamine
B	Malleus, incus, cochlea
C	Ilium, ischium, pubis
D	Actin, myosin, rhodopsin

List II
1	Pyrimidines
2	Ear ossicles
3	Coxal bones of the pelvic girdle
4	Muscle proteins

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Locomotion and Movement Test - 52

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Locomotion and Movement Test - 52

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SHARING IS CARING

Question 1

Calcitonin and thymosin - Thyroid hormones

Pepsin and prolactin - Two digestive enzymes secreted in stomach

Troponin and myosin - Complex proteins in striated muscles

Secretin and rhodopsin - Polypeptide hormones

Solution

Question 2

Actin and myosin

Tropomyosin

Troponin

All of these

Solution

Question 3

Osteoporosis - decrease in bone mass and higher chances of fractures with advancing age

Myasthenia gravis- auto immune disorder which inhibits sliding of myosin filaments

Gout - inflammation of joints due to extra deposition of calcium

Muscular dystrophy - age related shortening of muslces

Solution

Question 4

A

B

C

D

Solution

Question 5

The partial sustained contraction of major supporting muscles

A stronger contraction resulting from multiple motor unit summation

The result of wave summation, which produces a smooth and sustained contraction of a muscle

The state of muscle fatigue caused by depletion of ATP and accumulation of lactic acid

Solution

Question 6

(i) Actin binding site (ii) Head (iii) ATP binding site (iv) Cross arm

(i) Cross arm (ii) Actin binding site (iii) Head (iv) ATP binding site

(i) ATP binding site (ii) Actin binding site (iii) Head (iv) Cross arm

(i) Head (ii) Cross arm (iii) Actin binding site (iv) ATP binding site

Solution

Question 7

Calcium ions in large quantities.

Troponin.

ATPase enzyme.

ATP.

Solution

Question 8

diaphragm

internal intercostals

abdominal muscles

all of these

Solution

Question 9

Immune disorder affecting neuromuscular junction leading to fatigue

High concentration of $$Ca^{++}$$ and $$Na^+$$

Decreased level of oestrogen

Accumulation of uric acid leading to inflammation of joints

Solution

Question 10

Carpals

Humerus and pectoral girdle

Carpal and metacarpal of thumb

Knee

Solution

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