The iron containing haemoglobin pigment is a
protein
polysaccharide
enzyme
none of these
Correct Answer :
A. protein
Related Questions
The respiratory tubes devoid of car-tilagenous rings are
trachea
bronchi
bronchioles
none of these
The regulatory centre for respiration is situated in the
cerebral cortex
hypothalamus
medulla oblongata
procencephalon
The metal associated with haemoglobin is
Copper
Magnesium
Iron
Manganese
The impulses reaching voluntary muscles for forced breathing originate from
medulla oblongata
spinal cord
vagus nerve
cerebrum
Oxygen will diffuse through a membrane only if it is
moist
immersed in water
very thin
vascular
Which of the following can respire in total absence of air (anoxyliosis)?
Amoeba
Bed bug
Hydra
Tapeworm
Among the following, the maximum amount of usable energy is released per-molecule of glucose by
yeast cell in fermentation
a liver cell in glycolysis
an Amoeba in aerobic respiration
a muscle cell in lactic acid formation
The vibrations of which of these membranes produces vocal sounds?
Glottis
Vocal cords
Vocal sacs
Epiglottis
The rate and depth of breathing is primarily controlled by medulla by
the oxygen content of the blood
the nitrogen content of the blood
receptors in the larynx
the carbon dioxide content of the bkxxl
In a man at rest the body's cells consume approximately
5000 ml of oxygen per day
5000 ml of oxygen per hour
500 ml of oxygen per hour
200 ml of oxygen per minute
Internal respiration refers to
exchange of gases between lungs and blood
cellular respiration
exchange of gases between lungs and atmosphere
respiration in open air
The oxygen pressure in the alveolar air is
less than that is lung capillaries
equal to that in lung capillaries
double of that in lung capillaries
half of that in lung capillaries
The greatest volume of air that can be expired after a maximum inspiratory affect, is its
residual volume
tidal volume
vital capacity
lung volume
The functional unit of the lung is
neuron
alveolus
bronchus
none of these
In frog, the alveoli are surrounded by
flattened and ciliated cells to increase the surface area of lungs
columnar and ciliated cells to increase the surface area of lungs
only ciliated cells to increase the surface area of lungs
only squamous cells to decrease the surface area of lungs
To take air into the lungs, the diaphragmmust be
dome shaped
oblique
flattened
normal
The substances undergoing slow oxidation in the body during respiration are known as
Oxidases
Metabolites
ATP
ADP
In all vertebrates, the oxygen transport is through
haemocyanin
haemoglobin
myoglobin
haemoerythrin
Tissue respiration is a process by which
carbohydrates are synthesised
proteins are broken down
fat molecules are metabolised
energy is liberated
In response to high altitude hypoxia supply of oxygen to the tissue is maintained by
increased alveolar ventilation and increased cardiac output
shift in the haemoglobin dissociation curve to the right
increased erythrocytes and haemoglobin content of blood
all of these
During inspiration in mammals, the diaphragm shall
Contract
relax
expand
shows no change
Air directly enters the tracheae via the
external nares
pharynx
larynx
bronchi
In rabbits, respiration takes place in
Cells lining the lung cavities
Cells found in blood
All living cells of the body
RBC only
Anoxia means
absence of oxygen
diminished amount of oxygen delivered to the tissues
both (a) and (b)
none of these
The maximum volume of inspirable air is called
vital capacity
residual volume
inspiratory capacity
any of these
The condition in which the body suffers from acute oxygen shortage is called
anaemia
deoxygenation
detoxification
hypoxia
A normal man respires in a minute
25-30 times
10-15 times
14-18 times
20-25 times
The respiratory portion of the respiratory tract consists of
Pharynx, larynx, trachea, bronchi and bronchioles
Trachea, bronchi, bronchioles, alveolar ducts and alveoli
Respiratory bronchioles, alveola ducts, alveolar sacs and alveoli
Bronchi, bronchioles, alveolar ducts, alveolar sacs and alveoli
Diaphragm is characteristic of
egg-laying mammals only
marsupial mammals only
eutherian mammals only
all the mammals
Pulmonary artery
returns highly oxygenated blood to the left heart for distribution throughout the body
returns highly oxygenated blood to right heart for distribution throughout the body.
delivers blood to lungs low in oxygen
delivers highly oxygenated blood in lungs