Human Respiratory System Physiology
Questions covering the anatomy, physiology, and function of the human respiratory system including breathing mechanics, gas transport, and adaptations to altitude.
Questions
Number of red blood cells per unit volume of blood is likely to be higher in a person living at higher altitudes because at higher altitudes
- air is clean and unpolluted
- more sunlight is available
- air is less dense
- vegetation gives out more oxygen
- people need more oxygen
What is the tidal volume in human beings?
- 1200 ml
- 500 ml
- 3000 ml
- 1100 ml
- 2300 ml
Carbonic anhydrase is found in __________.
- leucocytes
- lymphocytes
- blood plasma
- erythrocytes
- platelets
What is supposed to happen, if a person stays on Mount Everest for some days?
- Production of red blood cells will decrease in his body.
- Production of red blood cells will increase in his body.
- Number of red blood cells will not change.
- Size of his red blood cells will increase.
- Size of his red blood cells will decrease.
Name the part, where gaseous exchange in lungs of mammals takes place.
- Tracheoles
- Alveoli
- Bronchi
- Bronchioles
- Pulmonary chambers
Thyroid cartilage is found in _________.
- larynx
- pharynx
- nose
- ear pinna
- lungs
Breathing is controlled by ___________.
- lungs
- trachea
- medulla
- intercostal muscles
- hypothalamus
What is the covering of the lungs called?
- Pericardium
- Perichondrium
- Peritoneum
- Pleural membrane
- Epicardium
Controlling centre of normal breathing in mammals lies in ____________.
- cerebrum
- cerebellum
- vagus nerves
- mid brain
- medulla oblongata
Volume of air inspired and expired in each breathe in normal respiration by man is called ________.
- total lung capacity
- tidal volume
- residual volume
- inspiratory capacity
- vital capacity
If a person living at sea level, migrates to about 8000 feet high hill, then his blood after about 15 days will ___________.
- increase in the volume
- have lesser number of white blood cells
- have more plasma
- have greater number of red blood cells
- have lower hemoglobin concentration
Which of these structure are associated with vocal cords?
- Larynx
- Pharynx
- Glottis
- Epiglottis
- Bronchial tube
Faster breathing in high fever condition is due to ___________.
- additional requirement of oxygen for invading germs
- high temperature of the body
- mental worries of the patient
- loss of appetite
- increase in carbon dioxide concentration
When man inhales air containing normal concentration of oxygen mixed with carbon monoxide, he feels suffocated because __________.
- carbon monoxide reacts with oxygen reducing percentage of oxygen in the air
- hemoglobin combines with carbon monoxide and the product cannot dissociate
- carbon monoxide affects the nerves of the lungs
- carbon monoxide affects the movement of diaphragm
- carbon monoxide affects the intercostal muscles
In which form is carbon dioxide mainly carried in the blood?
- Bicarbonate ions
- Carbaminohemoglobin
- In dissolved state
- Carbonic acid
- Sodium carbonate
During inspiration, the diaphragm ____________.
- relaxes and becomes dome shaped
- contracts and flattens
- expands and flattens
- shows no change
- looses its control
In mammals, carbon dioxide is transported from tissues to respiratory surface by __________.
- RBCs only
- RBCs and WBCs together
- plasma and RBCs
- plasma only
- platelets
Which of the following gases forms the most stable product with hemoglobin?
- Carbon dioxide
- Oxygen
- Carbon monoxide
- Ozone
- Sulfur dioxide