SAT Biology - Control and Co Ordination
Exam Duration: 45 Mins Total Questions : 30
Which part of brain that controls the balance of the body?
- (a)
Cerebrum
- (b)
Cerebellum
- (c)
Pons
- (d)
Medulla
Hypothalamus and thalamus are in ________
- (a)
Cerebellum
- (b)
Cerebrum
- (c)
Limbic system
- (d)
Diencephalon
Optic nerve is the
- (a)
Fifth cranial nerve
- (b)
Second cranial nerve
- (c)
Seventh cranial nerve
- (d)
Ninth cranial nerve
During the propagation of a nerve impulse the action potential results from the movement of
- (a)
Na+ ions from extracellular fluid to intracellular fluid
- (b)
K+ ions from extracellular fluid to intracellular fluid
- (c)
Na+ ions from intracellular fluid to extracellular fluid
- (d)
K+ ions from intracellular fluid to extracellular fluid
What area of the brain filters sensory information and helps to keep us alert?
- (a)
Cerebral cortex
- (b)
Medulla
- (c)
Reticular activating system
- (d)
Hippocampus
Increased response to an increase in stimulus intensity is called
- (a)
Positive phototaxis
- (b)
Kinesis
- (c)
Negative phototaxis
- (d)
Luminis
The grey matter of spinal cord consists
- (a)
Cell bodies
- (b)
Myelin
- (c)
Both A and B
- (d)
Purkinje cell
Which neurons send information from the sense organ to the C.N.S?
- (a)
Sensory neurons
- (b)
Motor neurons
- (c)
Interneurons
- (d)
Neuroglia
Cortisol is released from the:
- (a)
Parathyroid
- (b)
Adrenal cortex
- (c)
Hypothalamus
- (d)
Posterior pituitary
Which pair of hormones act antagonistically:
- (a)
Glucagon and Cortisol
- (b)
Insulin and Adrenalin
- (c)
Glucagon and Insulin
- (d)
Glucagon and Adrenalin
A "Skinner box" is used for experiments in:
- (a)
Operant conditioning
- (b)
Classical conditioning
- (c)
Migration
- (d)
Aggression
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
Avena coleoptile test to find out growth promoting hormones was performed by:-
- (a)
Went
- (b)
Lysenko
- (c)
Butler
- (d)
Borthwick
Parthenocarpy is the production of
- (a)
Fruits with pollination
- (b)
Fruits without fertilization
- (c)
Seeds with fertilization
- (d)
Only seeds and no fruits
Cytokinin
- (a)
Is a hormone whose main function is to induce the cell division
- (b)
Is the process of cell division
- (c)
Retards cell division
- (d)
Causes dormancy
Cytokinin
- (a)
Is a hormone whose main function is to induce the cell division
- (b)
Is the process of cell division
- (c)
Retards cell division
- (d)
Causes dormancy
Abscisic acid induces
- (a)
Shoot elongation
- (b)
Cell elongation and cell wall formation
- (c)
Cell division
- (d)
Leaf fall and dormancy
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
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
Learning, abstract thinking, memory and behaviour of a person are governed by
- (a)
cerebellum
- (b)
cerebrum
- (c)
thalamus
- (d)
medulla
The cerebellum is concerned with
- (a)
coordination of muscular movements
- (b)
memorization of facts
- (c)
perception
- (d)
regulation of the working of the heart and lungs
The number of cranial nerves is
- (a)
ten pairs in man and ten pairs in a toad
- (b)
thirteen pairs in man and ten pairs in a toad
- (c)
twelve pairs in man and ten pairs in a toad
- (d)
twelve pairs in man and twelve pairs in a toad
Grey matter of the brain contains
- (a)
cell bodies
- (b)
cell bodies with processes
- (c)
cell bodies with processes and a large number of synapses
- (d)
sensory and motor nerve cells
The longest cell in the body of an animal is
- (a)
osteocytes
- (b)
neuron
- (c)
chromatophores
- (d)
lymph corpuscles
The longest cell in the body of an animal is
- (a)
osteocytes
- (b)
neuron
- (c)
chromatophores
- (d)
lymph corpuscles
The speed at which impulses are conducted increase with
- (a)
increasing diameter of the soma
- (b)
increasing diameter of the axon
- (c)
increasing number of dendrites
- (d)
increasing branching of the dendrites
Proprioceptors are
- (a)
meant for detecting pressure in the skin
- (b)
for magnifying sound in the internal ear
- (c)
internal sense organs which occur most frequently in muscles
- (d)
for the detection of direction of waves in fishes
Deficiency of the thyroxine/hypothyroidism in adults results in
- (a)
diabetes mellitus
- (b)
diabetes insipidus
- (c)
myxodema
- (d)
exopthalamic goitre and adrenal
Brain is a part of
- (a)
peripheral nervous system
- (b)
central nervous system
- (c)
Autonomous nervous system
- (d)
Cranial nerves
