The medullary inspiratory centre is always under direct control of
chemicals
physical conditions
nerves
all of these
Correct Answer :
A. chemicals
Related Questions
In rabbits, respiration takes place in
Cells lining the lung cavities
Cells found in blood
All living cells of the body
RBC only
The iron containing haemoglobin pigment is a
protein
polysaccharide
enzyme
none of these
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 functional unit of the lung is
neuron
alveolus
bronchus
none of these
The rate of respiration is lowest at
sleeping
running
eating food
playing
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
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 medullary inspiratory centre is always under direct control of
chemicals
physical conditions
nerves
all of these
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 condition in which the body suffers from acute oxygen shortage is called
anaemia
deoxygenation
detoxification
hypoxia
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
In all vertebrates, the oxygen transport is through
haemocyanin
haemoglobin
myoglobin
haemoerythrin
The process of breathing-in of oxygen rich air from outside is called
expiration
inspiration
respiration
oxidation
The regulatory centre for respiration is situated in the
cerebral cortex
hypothalamus
medulla oblongata
procencephalon
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
Emphysema is a respiratory disease in which
the larynx is closed
the trachea gets narrowed
the gas exchange area of lungs is increased
the gas exchange area of lungs is decreased
Oxygen is transported to every cell of the body through
RBC
WBC
Both (a) and (b)
RBC and hormones
The impulses reaching voluntary muscles for forced breathing originate from
medulla oblongata
spinal cord
vagus nerve
cerebrum
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
Which of the following can respire in total absence of air (anoxyliosis)?
Amoeba
Bed bug
Hydra
Tapeworm
The capacity of lungs for air in a healthy man is about
500 ml
1000 ml
2000 ml
3000 ml
Air directly enters the tracheae via the
external nares
pharynx
larynx
bronchi
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 substances undergoing slow oxidation in the body during respiration are known as
Oxidases
Metabolites
ATP
ADP
Diaphragm is characteristic of
egg-laying mammals only
marsupial mammals only
eutherian mammals only
all the mammals
The metal associated with haemoglobin is
Copper
Magnesium
Iron
Manganese
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
To take air into the lungs, the diaphragmmust be
dome shaped
oblique
flattened
normal