NTSE SAT Biology - Control and Co Ordination
Exam Duration: 45 Mins Total Questions : 30
___ is an abundant inhibitory neuro-transmitter in CNS
- (a)
Adrenaline
- (b)
Acetylcholine
- (c)
GABA
- (d)
Non-adrenaline
Optic nerve is the
- (a)
Fifth cranial nerve
- (b)
Second cranial nerve
- (c)
Seventh cranial nerve
- (d)
Ninth cranial nerve
Which of the following is the most sensitive indicator of changes in the neurological status of patients with neurological disorder?
- (a)
LOC
- (b)
Orientation
- (c)
Cognitive function
- (d)
Co-ordination
What is the correct path of the reflex arc?
- (a)
Sensory stimulus ⟶ dendrite ⟶ axon
- (b)
Motor nerves ⟶ acetylcholine ⟶ adjustor neuron
- (c)
Efferent nerves ⟶ connector nerves ⟶ motor nerves
- (d)
Afferent ⟶ efferent ⟶ connector nerves
The gap between the two neurons is known as
- (a)
Synaptic node
- (b)
Synapse
- (c)
Synopsis
- (d)
Impulse
Artificial ripening of fruit is carried out by
- (a)
Auxins
- (b)
Ethylene
- (c)
Abscisic acid (ABA
- (d)
Gibberelins
A plant response to touch is called
- (a)
Photoperiodism
- (b)
Geotropism
- (c)
Thigmotropism
- (d)
Phototropism
Which of the hormone is released by thyroid?
- (a)
Insulin
- (b)
Thyroxin
- (c)
Trypsin
- (d)
Pepsin
The function of cerebellum is _____
- (a)
Memory of reflex motor
- (b)
Heart rate
- (c)
Sense of balance
- (d)
Level of alertness
The influence of daily cycle of light and darkness on the physiology and behaviour of an organism is known as:
- (a)
Mechanical rhythm
- (b)
Thermoperiodism
- (c)
Photoperiodism
- (d)
Thigmotropism
Which of the following is weedicide hormone?
- (a)
Auxin
- (b)
Gibberellin
- (c)
Abscisic acid
- (d)
Ethylene
_________ send information from the C.N.S to the Effectors.
- (a)
Sensory neurons
- (b)
Motor neurons
- (c)
Interneurons
- (d)
Neuroglia
Which pair of hormones act antagonistically:
- (a)
Glucagon and Cortisol
- (b)
Insulin and Adrenalin
- (c)
Glucagon and Insulin
- (d)
Glucagon and Adrenalin
A plant placed near a window bends outward because
- (a)
its tip is able to obtain more light
- (b)
its tip is able to receive n.ecessary warmth
- (c)
the auxin content on the shaded side is higher than that on the lighter side and as a result the shaded side elongate more than the cells on the illuminated side and the tip bends outward.
- (d)
its tip is able to get more oxygen
Phototropic movements of roots and stems are due to
- (a)
action of gravity
- (b)
effect of light
- (c)
differential hormonal effect
- (d)
epinasty and hyponasty
Which of the following movements in plants is NOT related to changes in auxin levels?
- (a)
Nyctinastic leaf movements
- (b)
Movement of roots towards soil
- (c)
Movement of sunflower tracking the direction of sun
- (d)
Movement of shoot towards light
Which of the following effects of auxins is of wide application
- (a)
Induction of fruit development
- (b)
Induction of root initiation
- (c)
Prevention of abscission
- (d)
All of the above
Phytohormone term was coined by
- (a)
Gregory and Purvis
- (b)
F.W. Went
- (c)
Thimann
- (d)
L.J. Audus
The two systems that regulate the activities of other systems of an animal are
- (a)
nervous system and muscular system
- (b)
endocrine system and respiratory system
- (c)
nervous system and endocrine system
- (d)
muscular system and sense organs
At most of the synapses
- (a)
an electric current jumps a gap
- (b)
there is contact between two neurons
- (c)
heat is produced
- (d)
neurohormones are released
Reflex action in a body is not
- (a)
inborn
- (b)
automatic and quick
- (c)
protective in nature
- (d)
voluntary
The conditioned reflex was discovered by
- (a)
Watson and Crick
- (b)
Pavlov
- (c)
Morgan
- (d)
Mendel
The main portion (s) of a neuron is fare
- (a)
cyton with dendrites
- (b)
axon with or without sheath
- (c)
terminal branch
- (d)
AII of the above
Hypothalamus controls the following function of the body, excluding
- (a)
sleep
- (b)
body temperature
- (c)
osmoregulation
- (d)
analysis of stimuli received through sense organs
A man suddenly sees a tiger. His heartbeat goes up, blood pressure increases, etc. Which hormone is released at this time in his body
- (a)
Parathormone
- (b)
Adrenaline
- (c)
Corticoid
- (d)
Thyroxine
Which of the following in an example of nastic movement in plants?
- (a)
Bending of plant towards light
- (b)
Growing of roots towards gravity
- (c)
Dropping of leaflets on touch
- (d)
Movement of pollen tube towards chemicals
Motor neurons carry nerve impulses from
- (a)
receptors to spinal cord
- (b)
receptors to muscles
- (c)
spinal cord to effectors
- (d)
effectors to spinal cord
Messages get passed on from one neuron to another through
- (a)
Dendrites
- (b)
Axons
- (c)
Synapses
- (d)
Cell body
The root of a plant is said to be
- (a)
positively geotropic
- (b)
positively phototropic
- (c)
negatively geotropic
- (d)
positively thigrnotropic
Which endocrine gland becomes inactive during old age?
- (a)
pituitary
- (b)
pineal
- (c)
adrenal
- (d)
thymus
