The impulses reaching voluntary muscles for forced breathing originate from
medulla oblongata
spinal cord
vagus nerve
cerebrum
Correct Answer :
A. medulla oblongata
Related Questions
All are lung diseases except
asthma
pericarditis
bronchitis
pneumonia
The process of breathing-in of oxygen rich air from outside is called
expiration
inspiration
respiration
oxidation
Air directly enters the tracheae via the
external nares
pharynx
larynx
bronchi
The respiratory tubes devoid of car-tilagenous rings are
trachea
bronchi
bronchioles
none of these
The capacity of lungs for air in a healthy man is about
500 ml
1000 ml
2000 ml
3000 ml
The condition in which the body suffers from acute oxygen shortage is called
anaemia
deoxygenation
detoxification
hypoxia
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
The substances undergoing slow oxidation in the body during respiration are known as
Oxidases
Metabolites
ATP
ADP
To take air into the lungs, the diaphragmmust be
dome shaped
oblique
flattened
normal
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
Tissue respiration is a process by which
carbohydrates are synthesised
proteins are broken down
fat molecules are metabolised
energy is liberated
Ciliated epithelium in the trachea of mammals helps in
sucking-in air
pushing expired air out
pushing mucus out
keeping the alveolar air in circulation
Colour of oxyhaemoglobin is
dull red
bluish red
bright red
dull brown
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 medullary inspiratory centre is always under direct control of
chemicals
physical conditions
nerves
all of these
The term used to denote the difference in volume between the total lung capacity and the vital capacity is
tidal volume
ventilation rate
residual volume
all of these
The iron containing haemoglobin pigment is a
protein
polysaccharide
enzyme
none of these
The maximum volume of inspirable air is called
vital capacity
residual volume
inspiratory capacity
any of these
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
Oxygen will diffuse through a membrane only if it is
moist
immersed in water
very thin
vascular
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
Diaphragm is characteristic of
egg-laying mammals only
marsupial mammals only
eutherian mammals only
all the mammals
The oxygen content of expired air in man is
3 per cent
25 per cent
16 per cent
20 per cent
The carbon dioxide pressure in the lung capillaries is
less than that in alveolar air
more than that in alveolar air
equal to that in alveolar air
similar to oxygen pressure in the capillaries
The regulatory centre for respiration is situated in the
cerebral cortex
hypothalamus
medulla oblongata
procencephalon
The vibrations of which of these membranes produces vocal sounds?
Glottis
Vocal cords
Vocal sacs
Epiglottis
The rate of respiration is lowest at
sleeping
running
eating food
playing
The respiratory disease immediately related to cigarette smoking is
hypercapnia
pulmonary edema
hypoxia
emphysema
Internal respiration refers to
exchange of gases between lungs and blood
cellular respiration
exchange of gases between lungs and atmosphere
respiration in open air
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