Biology - Human physiology

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Question - 1

In which animal, nerve cell is present but brain is absent?

  • A Sponge
  • B Honeybee
  • C Cockroach
  • D Hydra

Question - 2

Read the given statements and select the incorrect one.

  • A In Hydra, all neurons are similar and join to form a nerve net.
  • B In earthworms, nervous system consists of a dorsal nerve cord, paired ganglia and segmental nerves.
  • C Brain is present in insects
  • D Planaria has two nerve cords that join to form rudimentary brain.

Question - 3

Neurons in sponges are

  • A unipolar
  • B bipolar
  • C multipolar
  • D absent

Question - 4

In the accompanying diagram of a part of the human body, the structures belonging to the central neural system are labelled as

  • A A and C
  • B Band C 
  • C A and D
  • D C and D

Question - 5

Afferent nerve fibre carries impulses from

  • A effector to central neural system
  • B receptor to central neural system
  • C central neural system to muscle
  • D central neural system to receptors

Question - 6

Skeletal muscles are controlled by

  • A sympathetic nerves
  • B parasympathetic nerves
  • C somatic nerves
  • D autonomic nerves

Question - 7

In a human being, the number of cranial nerves is

  • A 12 pairs
  • B 6 pairs
  • C 20 pairs
  • D 10 pairs

Question - 8

The 3rd, 6th and 11th cranial nerves are respectively

  • A oculomotor, abducens and accessory
  • B oculomotor, trigeminal and accessory
  • C optic, facial and accessory
  • D trochlear, abducens and vagus.

Question - 9

In a man, abducens nerve is injured. Which one of the following functions will be affected?

  • A Movement of the eyeball
  • B Movement of the tongue
  • C Swallowing
  • D Movement of the neck

Question - 10

Which one of the following transmits impulses to central neural system?

  • A Abducen nerve
  • B Trochlear nerve
  • C Oculomotor nerve
  • D Auditory nerve