Tag: biology

Questions Related to biology

How can a person prevent itself from transmission of infection ?

biology health and diseases disease and its treatment manifestation and treatment of disease treatment of disease

  1. Contact precautions

  2. Droplet precautions

  3. Airborne precautions

  4. All of the above

Show answer
Correct Option: D
Explanation:

An individual can take following precautions to avoid infection: avoid physical contact, cover face with mask to prevent droplet infection and airborne infection. Therefore, (d) is the correct answer.

The second basic principle for prevention of infection is

biology health and diseases disease and its treatment manifestation and treatment of disease treatment of disease

  1. Consumption of proper food.

  2. Promote immune system.

  3. Prevent exposure of microbes.

  4. All of the above.

Show answer
Correct Option: A

Assertion : Old age is not an illness. It is a continuation of life with decreasing capacity for adaptation.

Reason : Cessation of mitosis is normal genetically programmed event.

biology health and diseases disease and its treatment manifestation and treatment of disease treatment of disease

  1. Both Assertion and Reason are true and Reason is a correct explanation of Assertion

  2. Both Assertion and Reason are true but Reason is not a correct explanation of Assertion

  3. Assertion is true but Reason is false

  4. Both Assertion and Reason are false

  5. Assertion is false but reason is true.

Show answer
Correct Option: C
Explanation:

Old age is not illness. It includes progressive deterioration of the structure and functions of cells, tissue, organs and organs systems. With increasing age, the efficiency of heat decreases and consequently, the blood going the brain and kidney is reduced to 80% and 42% respectively. Arthritis, weak eyesight, less secretion of digestive juices etc. are some degenerative diseases. Cessation of mitosis is not a genetically programmed event.

So, the correct answer is 'Assertion is true but Reason is false'.

Ginglymoid/hinge joint occurs in

biology body movement joints in the human body our skeletal system and the skin joints

  1. Elbow and shoulder

  2. Elbow and knee

  3. Atlas and odontoid process

  4. Knee and ankle

Show answer
Correct Option: B
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. 
  • A hinge joint (ginglymus) is a joint in which the articular surfaces are molded to each other in such a manner as to permit motion only in one plane.
  • The knee joint and elbow is a hinge joint/ ginglymoid i.e a type of synovial joint. 
  • So, the correct answer is 'Elbow and Knee'.

Largest synovial joint is

biology body movement joints in the human body our skeletal system and the skin joints

  1. Hip joint

  2. Knee joint

  3. Shoulder joint

  4. Ankle joint

Show answer
Correct Option: B
Explanation:

A synovial joint is a connection between two bones which consists of a cartilage lined cavity filled with fluid. The knee joint is the biggest synovial joint in the human body. At the junction of the knee, the large femur bone of the thigh connects to both the tibia and fibula of the leg, as well as to the patella or knee cap. So, the correct answer is 'Knee joint'.

Synovial fluid is present in

biology body movement joints in the human body our skeletal system and the skin joints

  1. Spinal cavity

  2. Cranial cavity

  3. Freely movable joints

  4. Fixed joints

Show answer
Correct Option: C
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.
  • Synovial joints are freely movable joint. Hence synovial fluid is present in freely movable joint.
  • So,the correct answer is 'Freely movable joints'.

Friction is lessened in ball-and-socket joint by

biology body movement joints in the human body our skeletal system and the skin joints

  1. Coelomic fluid

  2. Synovial fluid

  3. Pericardial fluid

  4. Mucin

Show answer
Correct Option: B
Explanation:

Synovial fluid is the pale yellow fluid that is present in every joint of the human body. It helps the bone able to slide past each other without causing damage to the ends of the bone. It means that synovial fluid lessens the friction in ball and socket joint. So, the correct answer is 'Synovial fluid'.

Hypothalamus is

biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. Helpful in sleep

  2. Has centres for thirst and hunger

  3. Controls body temperature

  4. All the above

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Correct Option: D

In hypothalamus are located various centres of

biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. Metabolism

  2. Circulation

  3. Respiration

  4. Excretion

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Correct Option: A

Diencephalon is related to

biology chemical messages for homeostasis hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

  1. Pons

  2. Corpora quadrigemina

  3. Basal ganglia

  4. Hypothalamus

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Correct Option: D