Biology

Respiration and Gas Transport

647 Questions

Respiration and gas transport deal with the physiological mechanisms of breathing, including the role of hemoglobin in oxygen transport and the removal of carbon dioxide from the blood. Questions cover both aerobic and anaerobic processes, along with related phenomena like altitude sickness. This human biology topic is a staple in the science sections of competitive tests.

Oxygen and hemoglobin transportAnaerobic respiration effectsCarbon dioxide removalAltitude sickness causesBreathing rate regulation

Respiration and Gas Transport Questions

Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

Raising of pH of blood shall result in

  1. Inhibition of carbonic anhydrase

  2. Production of carbon monoxide and causing carbon monoxide poisoning

  3. Non-release of carbon dioxide from carbonic acid and carbonates

  4. Non-dissociation of oxygen from oxyhaemoglobin.
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
A decrease in pH (increase in $H^+$ ion concentration) various amino acid residues, such as Histidine 146 exist predominantly in their protonated form allowing them to form ion pairs that stabilize deoxyhemoglobin thereby having a lower affinity for oxygen. So with increased acidity, the hemoglobin binds less $O _2$.This is known as the Bohr effect. The binding affinity of hemoglobin to O2 is greatest under a relatively high pH and oxygen does not disassociate with hemoglobin under increased pH conditions.
So the correct answer is 'Non-dissociation of oxygen from oxyhemoglobin.'
Multiple choice

What is the process by which oxygen is taken up by the body and carbon dioxide is released called?

  1. Respiration

  2. Diffusion

  3. Osmosis

  4. Photosynthesis
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Respiration is the process by which oxygen is taken up by the body and carbon dioxide is released.

Multiple choice

What is the role of hemoglobin in the transport of oxygen in the body?

  1. To carry oxygen from the lungs to the tissues

  2. To carry carbon dioxide from the tissues to the lungs

  3. To regulate body temperature

  4. To produce energy from food
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hemoglobin is a protein in red blood cells that carries oxygen from the lungs to the tissues.

Multiple choice

What is the process by which animals take in oxygen and release carbon dioxide?

  1. Photosynthesis

  2. Cellular respiration

  3. Transpiration

  4. Fermentation
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cellular respiration is the process by which animals use oxygen to break down glucose and produce energy.

Multiple choice

Which type of biomolecule is responsible for transporting oxygen in the bloodstream?

  1. Carbohydrates

  2. Proteins

  3. Lipids

  4. Nucleic acids
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Proteins, specifically hemoglobin, are responsible for transporting oxygen in the bloodstream and facilitating oxygen delivery to tissues.

Multiple choice

What is the process by which oxygen and carbon dioxide are exchanged in the lungs?

  1. Diffusion

  2. Osmosis

  3. Active transport

  4. Filtration
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Oxygen and carbon dioxide are exchanged in the lungs through the process of diffusion, where gases move from areas of higher concentration to areas of lower concentration.

Multiple choice

What is the term for the process by which oxygen moves from the alveoli to the bloodstream?

  1. Diffusion

  2. Perfusion

  3. Ventilation

  4. Respiration
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Diffusion is the process by which oxygen moves from the alveoli to the bloodstream across the alveolar-capillary membrane.

Multiple choice

What is the term for the condition characterized by abnormally low levels of oxygen in the blood?

  1. Hypoxemia

  2. Hypercapnia

  3. Hypoventilation

  4. Apnea
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hypoxemia is the condition characterized by abnormally low levels of oxygen in the blood.

Multiple choice

Which of the following is a common respiratory assessment technique used to measure the partial pressure of oxygen and carbon dioxide in arterial blood?

  1. Arterial blood gas analysis

  2. Pulse oximetry

  3. Spirometry

  4. Chest X-ray
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Arterial blood gas analysis is a common respiratory assessment technique used to measure the partial pressure of oxygen and carbon dioxide in arterial blood.

Multiple choice

What is the term for the condition characterized by abnormally high levels of carbon dioxide in the blood?

  1. Hypoxemia

  2. Hypercapnia

  3. Hypoventilation

  4. Apnea
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Hypercapnia is the condition characterized by abnormally high levels of carbon dioxide in the blood.

Multiple choice

Which blood cells are responsible for carrying oxygen?

  1. Red blood cells

  2. White blood cells

  3. Platelets

  4. Lymphocytes
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Red blood cells contain hemoglobin, which binds to oxygen and transports it throughout the body.

Multiple choice

What is the process by which oxygen is taken into the body and carbon dioxide is released?

  1. Respiration

  2. Diffusion

  3. Osmosis

  4. Active transport
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Respiration is the process by which oxygen is taken into the body and carbon dioxide is released. Diffusion, osmosis, and active transport are all processes by which molecules move across a concentration gradient.

Multiple choice

What is the term for the maximum amount of oxygen that the body can use during exercise?

  1. Lactate threshold

  2. Anaerobic threshold

  3. VO2 max

  4. RPE
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

VO2 max is the maximum amount of oxygen that the body can use during exercise.

Multiple choice

What is the name of the molecule that is responsible for carrying oxygen in the blood?

  1. Hemoglobin

  2. Myoglobin

  3. Cytochrome c

  4. Albumin
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Hemoglobin is the molecule that is responsible for carrying oxygen in the blood.