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Biology 1525 MCQs [All-Courses]

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Biology covers key concepts of life, organisms, and human systems with exam-focused notes for PPSC, FPSC, KPPSC, BPSC.,NTS, OTS, AJKPSC. Clear, concise topics help students prepare effectively for competitive tests.

All Topics  1525

Under resting membrane potentials:
A Outer surface of neuron is more positive
B Inner surface of neuron is more positive
C Both of these surfaces are equally positive
D none of these.
Correct Answer: Outer surface of neuron is more positive
What is the function of synapse________________?
A To allow nerve impulse to move in backward direction
B To decrease the speed of nerve impulse
C To stop the nerve impulse
D To provide cytoplasmic connection between neurons.
Correct Answer: To decrease the speed of nerve impulse
Microscopic gaps between the neuron endings are called__________?
A Transmitters
B Synapses
C Pores
D Nodes
Correct Answer: Synapses
Which of the following cytoplasmic extensions carry the message toward the cell body___________?
A Dendrites
B Axon
C Both of these
D none of these
Correct Answer: Dendrites
Which of the following neuron has a single long dendron?
A Sensory neuron
B Motor neuron
C Associative neuron
D none of these.
Correct Answer: Sensory neuron
In which of the following neurons length of dendrite is greater than axon_______________?
A Sensory neuron
B Motor neuron
C Associative neuron
D none of these.
Correct Answer: Sensory neuron
Which of the following transmits nerve impulse from receptors to central nervous system?
A Sensory neuron
B Motor neuron
C Associative neuron
D none of these.
Correct Answer: Sensory neuron
Which of the followings is missing from the nervous system of planaria_____________?
A Ganglia
B Longitudinal nerves
C Lateral nerves
D none of these
Correct Answer: none of these
Co-ordination in man is brought about by___________?
A Nervous system
B Endocrine system
C Both of these
D none of these.
Correct Answer: Both of these
Hydra has___________?
A Brain
B Nerves
C Neuron-cells
D All of these
Correct Answer: Neuron-cells
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