The rate of respiration is lowest at
sleeping
running
eating food
playing
Correct Answer :
A. sleeping
Related Questions
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
During inspiration in mammals, the diaphragm shall
Contract
relax
expand
shows no change
Tissue respiration is a process by which
carbohydrates are synthesised
proteins are broken down
fat molecules are metabolised
energy is liberated
The process of breathing-in of oxygen rich air from outside is called
expiration
inspiration
respiration
oxidation
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
Anoxia means
absence of oxygen
diminished amount of oxygen delivered to the tissues
both (a) and (b)
none of these
The impulses reaching voluntary muscles for forced breathing originate from
medulla oblongata
spinal cord
vagus nerve
cerebrum
Internal respiration refers to
exchange of gases between lungs and blood
cellular respiration
exchange of gases between lungs and atmosphere
respiration in open air
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
In rabbits, respiration takes place in
Cells lining the lung cavities
Cells found in blood
All living cells of the body
RBC only
Oxygen will diffuse through a membrane only if it is
moist
immersed in water
very thin
vascular
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 medullary inspiratory centre is always under direct control of
chemicals
physical conditions
nerves
all of these
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
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
The regulatory centre for respiration is situated in the
cerebral cortex
hypothalamus
medulla oblongata
procencephalon
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
Which of the following can respire in total absence of air (anoxyliosis)?
Amoeba
Bed bug
Hydra
Tapeworm
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
The functional unit of the lung is
neuron
alveolus
bronchus
none of these
Air directly enters the tracheae via the
external nares
pharynx
larynx
bronchi
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 iron containing haemoglobin pigment is a
protein
polysaccharide
enzyme
none of these
Oxygen is transported to every cell of the body through
RBC
WBC
Both (a) and (b)
RBC and hormones
The maximum volume of inspirable air is called
vital capacity
residual volume
inspiratory capacity
any of these
The opening into the wind pipe or trachea is called
larynx
epiglottis
glottis
bronchi
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
The membrane covering the lungs is
conjunctiva
pleura
meninges
peritoneum