Tag: the respiratory system

Quizzes (15) Questions (110)

Questions Related to the respiratory system

Multiple choice biology the respiratory system factors affecting breathing exchange of gases transport of respiratory gases

Ischemia is insufficient blood flow to tissues which can result in 

  1. Asphyxiation

  2. Hypoxia

  3. Anemia

  4. All of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Ischemia, meaning insufficient blood flow to a tissue, can also result in hypoxia. This is called as 'ischemic hypoxia'. This can include an embolic event, a heart attack that decreases overall blood flow, or trauma to a tissue that results in damage. An example of insufficient blood flow causing local hypoxia is gangrene that occurs in diabetes. 

Therefore, the correct answer is option B.

Multiple choice biology the respiratory system factors affecting breathing exchange of gases transport of respiratory gases

Perinatal asphyxia is seen in 

  1. Adults

  2. Old people

  3. Newborn infant

  4. All of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Perinatal asphyxia is the medical condition resulting from deprivation of oxygen (hypoxia) to a newborn infant long enough to cause apparent harm. It results most commonly from a drop in maternal blood pressure or interference during delivery with blood flow to the infant's brain. 

Therefore, the correct answer is option C.

Multiple choice biology the respiratory system factors affecting breathing exchange of gases transport of respiratory gases

Asphyxia occurs due to.

  1. Rise in level of $CO _2$
  2. Fall in level of $CO _2$
  3. Rise of $O _2$ level
  4. Fall in $O _2$ level
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Asphyxia is a condition of severely deficient supply of oxygen to the body that arises from being unable to breathe normally, often caused by an accumulation of carbon dioxide in the blood.

Multiple choice biology the respiratory system factors affecting breathing exchange of gases transport of respiratory gases

Which one of the following can respire in total absence of air (anoxybiosis)?

  1. Amoeba

  2. Bed bug

  3. Hydra

  4. Tapeworm
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Tapeworms live in the human gut and can be up to 9 meters long. Parasites have specific features which enable them to survive in or on their host. They use anaerobic respiration, so that they can survive without oxygen.

Multiple choice biology the respiratory system factors affecting breathing exchange of gases transport of respiratory gases

The mountaineers carry oxygen with them because.

  1. At an altitude of more than $5$km there is no air

  2. The amount of air available to a person is less than that available on the ground

  3. The temperature of air is higher than that on the ground

  4. The pressure of air is higher than that on the ground
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The atmospheric pressure goes on decreasing as we go up above the sea level, and the amount of oxygen also decreases at higher altitude. 

So the correct option is 'The amount of air available to a person is less than that available on the ground.'

Multiple choice biology the respiratory system factors affecting breathing exchange of gases transport of respiratory gases

A condition in which body is deprived of adequate oxygen is called as

  1. Hyperventilation

  2. Hypoventilation

  3. Hypoxia

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
Hypoxia is a condition of absence of enough amount of oxygen in the body tissues to sustain bodily function. This condition can occur due to low concentration of oxygen in the environment or due to inadequate breathing.
So, the correct answer is 'Hypoxia'.
Multiple choice biology the respiratory system factors affecting breathing exchange of gases transport of respiratory gases

Ravi, who lived at sea level, had around 5 million RBC per cubic millimeter of his blood. Later when he lived at an altitude of 18,000 ft, showed around 8 million RBC per cubic millimeter of blood. This is an adaptation because

  1. At high altitude, he ate more nutritive food.

  2. He had pollution free air to balance breathe.
  3. At high altitude O$ _2$ level is less, hence, more RBCs were required to absorb enough oxygen.

  4. At high altitude, there is more UV radiation which enhances RBCs production.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

At sea level, our blood is 98% saturated with oxygen and this decreases to 89% at 3000 metres and reaches as low as 40% on the summit of Everest. Red blood cell production increases, resulting in an increased haemoglobin concentration, which is required to pick up oxygen and transport it around the body. This mechanism enables the body to continue to deliver enough oxygen to each cell, despite the lower oxygen levels. 

Multiple choice biology the respiratory system factors affecting breathing exchange of gases transport of respiratory gases

Ascent of high mountains may cause altitude sickness in men. Prime cause of this is

  1. Excess of O$ _2$ in blood

  2. Decreased efficiency of haemoglobin

  3. Decreased partial pressure of oxygen

  4. Decreased proportion of oxygen in air
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

 Altitude sickness (also known as mountain sickness), is caused by gaining altitude too rapidly, which does not allow the body enough time to adjust to reduced oxygen and changes in air pressure, and causes hypobaric hypoxia (a lack of oxygen reaching the tissues of the body).