Pacemaker is the
Sinu-auricular node
Auriculo-ventricular node
Bundle of His
Purkinje fibres
Correct Answer :
A. Sinu-auricular node
Related Questions
The counting of RBCs is done with
haemocytometer
haemoglobinometer
clinostat
thermometer
The blood pressure is controlled by the hormone
Vasopressin
Oxytocin
Oestrogen
Testasterone
Light compensation zone refers to
where light is available in plenty
where all light energy is used
where light is maximum
beyond which light does not penetrate
One of the following is often called the master gland. Which one is it?
Thymus
Islets of Langerhans
Pituitary
Thyroid
Whooping cough is caused by
Salmonella
Bacillus pertussis
Variola
Vibriona
Clotting of blood is
a chain reaction
reversible reaction
reflex action
no reaction
The counting of RBC's can be performed by
Haemocytometer
Haemoglobinometer
Clinostat
Thermometer
Cutting and layering are the methods of plant propagation usually referred to as
asexual reproduction
sexual reproduction
vegetative reproduction
gardening
The specific gravity of blood
lower than water
higher than water
same as water
many times that of water
Niche' refers to
place of living
type of food
place of living and type of food
food and movement
Spiders can take only
solid food
liquid food
plant juice
flesh of dead animals
In phototropism, auxins
Promote growth of cells
Inhibit cell division
Inhibit growth of cells
Stimulate differential growth of cells
Dinosaur is a/an
Fish
Amphibian
Reptile
Bird
The normal temperature of human body on the Kelvin scale is
280
290
300
310
The function of a cell wall is
to give definite shape to the cell
to provide mechanical strength and protection to the cell
to prevent the cell from desiccation
All the above
Which among the following diseases is not caused by viral infection?
pneumonia
small pox
mumps
active transport
Formation of blood
Histolysis
Histogenesis
Haemopoiesis
Haemolysis
The study of heart is called
haematology
cardiology
pathology
nephrology
Saliva flows at the sight of food. This action is
involuntary
voluntary
a reflex
causative
The medulla oblongata encloses the
optic lobe
optic capsule
second ventricle
fourth ventricle
The suggestion that the chromosomes are the carriers of hereditary material was first made by
Johanson
Flemming
Sutton and Boveri
Morgan
Diseases in plants can be caused by
virus
bacteria
fungi
All the above
In plants water is carried upwards by
phloem
paranchyma
xylem
meristem
Which one of the following is essential for blood clotting?
RBC
WBC
Blood platelets
Lymph
Green plants In the sea are useful for respiration of flash because they
release oxygen
release carbon dioxide
release oxygen and carbon dioxide simultaneously
take oxygen and give out carbon dioxide
Pneumonia is ,a bacterial disease caused by the type of bacteria called
Bacilli
Cocci
Sprilli
Vibrio
The bird that lays the largest egg is
crow
ostrich
cuckoo
eagle
Blood plasma from which fibrinogen is removed is known as
serum
blood concentrate
lymph
antibody component
The principal reason why it is better to have two eyes than one is that
by having two eyes, one can distinguish colours more easily
by having two eyes, one can easily see in the dark and dim light
this gives the man a type of vision known as mosaic vision
this enhances depth perception in the humans
When does the heart start functioning?
At birth
After birth
Before birth
After a week from birth