In humans, visceral organs are innervated by
sympathetic nerves and are under conscious control
parasympathetic nerves and are under conscious control
Both (a) and (b)
both sympathetic and parasympathetic nerves but are not under conscious control
Vagus nerve is
X
IX
VII
V
Afferent nerve fibres carry impulses from
effector organs to CNS
receptors to CNS
CNS to receptors
CNS to muscles
Ivan Pavlov performed experiments on
simple reflexes
conditional reflexes
cardiac reflexes
origin of life
Respiratory centre is situated in
cerebellum
medulla oblongata
hypothalamus
cerebrum
Light rays entering the eye are controlled by
pupil
iris
cornea
lens
CNS is mostly made of
motor neurons and sensory neurons
sensory neurons and association neurons
association neurons
motor neurons and association neurons
In which animal nerve cell is present but brain is absent?
Sponge
Earthworm
Cockroach
Hydra
Acute vision is present in
vulture
shark
bat
frog
Third ventricle of brain is also known as
metacoel
rhinocoel
paracoel
diacoel
