Tag: zoology

Questions Related to zoology

In Myasthenia gravis acetylcholine __________________.

zoology locomotion and movement disorders of musculoskeletal system disorders of muscle and skeleton joints and movements

  1. Receptors on motor end plate are reduced

  2. Secretion from nerve terminals is reduced

  3. Esterase activity is inhibited

  4. Secretion from nerve terminals is enhanced

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Correct Option: A

Which of the following indicates tetany?

zoology locomotion and movement disorders of musculoskeletal system disorders of muscle and skeleton joints and movements

  1. Spasm

  2. Muscular cramps

  3. Tremors

  4. All of the above

Show answer
Correct Option: D
Explanation:
Tetany is a condition marked by intermittent muscular cramps and spasms, caused by malfunction of parathyroid glands and due to deficiency of calcium. Tremors are also seen. 
So, the correct answer is 'All of the above'.

Which of the following are the reasons(s) for rheumatoid arthritis? Choose the correct option
(i) Lymphocytes become more active
(ii) Body attacks self cells
(iii) More antibodies are produced in the body
(iv) The ability to differentiate pathogens or foreign molecules from self cells is lost

zoology locomotion and movement disorders of musculoskeletal system disorders of muscle and skeleton joints and movements

  1. (i) and (ii) 

  2. (ii) and (iv) 

  3. (iii) and (iv)

  4. (i) and (iii)

Show answer
Correct Option: A
Explanation:
Rheumatoid arthritis is chronic pain due to inflammation of the synovial membrane of many joint simultaneously. It usually starts in the small joints in the hand and progressive and centripetal an asymmetric manner.
It involves erosion of the joints. 
The major cause of this the lymphocytes become more active and the body cells lose the ability to differentiate between the self and the foreign cells. The lymphocytes start attacking the body cells.
So, the correct option is '(i) and (ii)'

Which of the following is the correct pairing regarding a specific disorder of muscular or skeletal system ?

zoology locomotion and movement disorders of musculoskeletal system disorders of muscle and skeleton joints and movements

  1. Muscular dystrophy - Age related shortening of muscles

  2. Osteoporosis - Decrease in bone mass and higher chances of fractures with advancing age

  3. Myasthenia gravis - Autoimmune disorder which inhibits sliding of myosin filaments

  4. Gout - Inflammation of joints due to extra deposition of calcium

Show answer
Correct Option: B
Explanation:

Muscular dystrophy is a genetic disease, osteoporosis is the decrease in bone mass, which leads to higher chances of fractures with advancing age.

So, the correct option is 'Osteoporosis - Decrease in bone mass and higher chances of fractures with advancing age'.

Osteoporosis is commonly caused die to:

zoology locomotion and movement disorders of musculoskeletal system disorders of muscle and skeleton joints and movements

  1. decreased level of progesterone

  2. decreased level of oestrogen

  3. increased level of progesterone

  4. increased level of oestrogen

Show answer
Correct Option: A
Explanation:

Osteoporosis causes bones to become weak and brittle — so brittle that a fall or even mild stresses such as bending over or coughing can cause a fracture. Osteoporosis-related fractures most commonly occur in the hip, wrist or spine. So the correct option is 'decreased level of progesterone'.

Paralysis of both lower limbs due to spinal cord damage and not the upper limbs is called as

zoology locomotion and movement disorders of musculoskeletal system disorders of muscle and skeleton joints and movements

  1. Hemiplegia

  2. Quadriplegia

  3. Posterioplegia

  4. Paraplegia

Show answer
Correct Option: D
Explanation:

Paraplegia is an impairment in motor or sensory function of the lower extremities. It is usually the result of spinal cord injury.

An age-dependent disorder characterized by increased fragility and low bone mass resulting from deficiency of Ca and vitamin D is

zoology locomotion and movement disorders of musculoskeletal system disorders of muscle and skeleton joints and movements

  1. Oesteoporosis

  2. Osteoarthritis

  3. Rheumatoid arthritis

  4. Gout

  5. Rickets

Show answer
Correct Option: A
Explanation:

Osteoporosis is a progressive bone disease characterized by a decrease in bone mass and density which can lead to an increased risk of fracture. In osteoporosis, the bone mineral density is reduced. Low levels of vitamin D is associated with osteoporosis.
Therefore, the correct answer is option A.

Myasthenia gravis is a/an

zoology locomotion and movement disorders of musculoskeletal system disorders of muscle and skeleton joints and movements

  1. Autoimmune disease caused due to non-secretion of acetylcholine at neuromusclar junction.

  2. Muscle related disease, caused by hormonal disorder.

  3. Autoimmune disease, caused due to non-section of CSF.

  4. Autommune disease, caused due to non-conduction of impulses at neural junction.

Show answer
Correct Option: A
Explanation:

Myasthenia gravis is an autoimmune disease that destroys the skeletal muscles responsible for actions such as swallowing, breathing, etc. It is caused due to the inability of muscles to respond to the nerve impulse due to the destruction of the receptors of acetylcholine on them. The acetylcholine is secreted from the neurons at the neuromuscular junction which is not perceived by the muscles as their receptors have been destroyed by the antibodies.

Hence, the correct answer is 'Autoimmune disease, caused due to non-conduction of impulses at neural junction'

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

zoology locomotion and movement disorders of musculoskeletal system disorders of muscle and skeleton joints and movements

  1. Immune disorder affecting neuromuscular junction leading to fatigue

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

  3. Decreased level of oestrogen

  4. Accumulation of uric acid leading to inflammation of joints

Show answer
Correct Option: C
Explanation:

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.

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

zoology locomotion and movement disorders of musculoskeletal system disorders of muscle and skeleton joints and movements

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

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

  3. Gout - inflammation of joints due to extra deposition of calcium

  4. Muscular dystrophy - age related shortening of muslces

Show answer
Correct Option: A
Explanation:

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.
So the correct option is A.