The impulses of sound wave are transmitted by …. In the auditory cortex of the brain.

  • Afferent Fibres via auditory nerves

  • Efferent Fibres via auditory nerves

  • Association fibres via auditory nerve

  • Both A and C

Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I                                               Column II
I. Influx of sodium                           1. Original establisnment of RMP
II. Efflux of potassium                      2. Repolarization
III. Na+/K+ pump                          3. Depolarization
IV. Ca++                                        4. Plateau in cardiac muscles
Codes: 
      I    II    III    IV

  • .   3    2     4     1
  • .   2    1     4     3
  • .   2    1     3     4
  • .   3    2     1     4

Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I                         Column II
I. Diencephalon             1. Thalamus and Hypothalamus
II. Telencephalon           2. Cerebral cortex
III. Myelencephalon       3. Medulla oblongata
IV. Metencephalon         4. Pons and Cerebellum
Codes:
     I   II   III   IV

  • .  1   2    3    4
  • .  2   1    4    3
  • .  2   1    3    4
  • .  1   2    4    3

Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I                                  Column II
(structure)                               (function)
I. Corpus striatum                    1. Aggression and remembering fear
II. Amygdala                            2. Planning and execution of stereotyped movements
III. Hippocampus                      3. Sexual arousal
IV. Septum                               4. Memory
Codes:
     I   II   III   IV

  • .  1   2    3    4
  • .  2   1    4    3
  • .  2   1    3    4
  • .  1   2    4    3 

Match each item in Column I with one item in Column II regarding human eye and chose your answer from the codes given below:
Column I                            Column II
I. Cornea                           1. Acomodation
II. Ciliary body                   2. Major refraction surface
III. Iris                              3. Regulation of pupil size
IV. Horizontal cells              4. Lateral line inhibition
Codes:
       I    II    III    IV

  • .    1    2     3     4
  • .    2    1     4     3
  • B.    2    1     4     3
  • .    1    2     4     3

Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I                      Column II
I. Otoconia                  1. Nasal epithelium
II. Bowman’s gland      2. Utricle
III. Cupula                  3. Scala media
IV. Endolymph             4. Semi-circular canals
Codes:
     I    II    III    IV

  • .  1    2     3     4
  • .  2    1     4     3
  • .  2    1     3     4
  • .  1    2     4     3

Identify the correct statement regarding the following diagram:

  • B and F are filled with endolymph
  • C is filled with perilymph
  • Hair cells press against E to generate nerve impulses
  • D is the sensory organ of hearing and has auditory receptors

A major coordinating center for sensory and motor signaling in the human brain is shown in the given sagittal section by the letter:

  • A
  • B
  • C
  • D

In the resting stage, the axonal membrane:

  • is more permeable to sodium than to potassium ions
  • is more permeable to potassium than to sodium ions
  • equally permeable to both sodium and potassium ions
  • impermeable to both sodium and potassium ions

Sympathetic stimulation would lead to all of the following except:

  • Dilation of pupil
  • Bronchoconstriction
  • Increased heart rate
  • Decreased gland secretions

Which layer of human retina stores Vitamin A?

  • Pigment layer
  • Rods 
  • Layer of bipolar cells
  • Inner plexiform layer

Which region of the diencephalon controls the ANS and endocrine system and body temperature?

  • epithalamus

  • hypothalamus

  • thalamus

  • infundibulum

The autonomic division of the peripheral nervous system does not innervate:

  • visceral organs
  • exocrine glands
  • skeletal muscle
  • endocrine glands

The reflex arc ends at:

  • sensory neuron
  • motor neuron
  • effector
  • receptor

The brain stem does not include:

  • medulla
  • pons
  • midbrain
  • cerebral cortex

All the following statements regarding the action potential are true except:

  • Only a relatively small number of Na+ and K+ ions actually diffuse across the membrane.
  • This event includes both positive and negative feedback loops.
  • The Na+/K+ pumps are directly involved in creating the action potential.
  • During an action potential, the Na+ and K+ total concentration are not significantly changed.

Four healthy people in their twenties got involved in injuries resulting in damage and death of a few cell of the following. Which of the cells are least likely to be replaced by new cells -

  • Osteocytes

  • Liver cells

  • Neurons

  • Malpighian layer of the skin

One of the examples of the action of the autonomous nervous system is -

  • Knee-jerk reponse

  • Pupillary reflex

  • Peristalsis of the intestines

  • Swallowing of food

Which of the following target tissues is innervated by only neurons from the sympathetic nervous system?

  • adrenal medulla
  • lacrimal glands
  • bronchioles
  • iris of the eye

Which brain disease involves degeneration of cholinergic neurons in certain brain regions, causing deterioration of cognitive and intellectual functions in the elderly?

  • Schizophrenia
  • Depression
  • Alzheimer disease
  • Cerebral Palsy

What would happen if you had an unusually short basilar membrane in the cochlea?

  • Your sense of balance would be affected.
  • You would not be able to detect very high frequency sounds.
  • You would not be able to detect very low frequency sounds.
  • All sounds would be muffled

Which statement is not correct concerning rods and cones?

  • Rods are responsible for black and white vision.
  • Cones are responsible for color vision.
  • Most of the rods and cones are concentrated in the fovea.
  • Cones are responsible for high visual acuity or sharpness.

The actual receptors for hearing and balance are the _____.

  • mechanoreceptors
  • otoliths
  • cochlear cells
  • hair cells

The _____ acts to keep one aroused and awake.

  • vasomotor center
  • corpora quadrigemina
  • diencephalon
  • reticular formation

Five events in the transmission of nerve impulse across the synapse -
A. Opening of specific ion channels allows the entry of ions, a new action potential is generated in the post-synaptic neuron

B. Neurotransmitter binds to the receptor on post-synaptic membrane.

C. Synaptic vesicle fuses with pre-synaptic membrane, neurotransmitter releases into synaptic cleft

D. Depolarization of pre-synaptic membrane

E. Arrival of an action potential at the axon terminal

In which sequence do these events occur?

  • E D C B A

  • A B C D E
  • A B D C E
  • E D C A B

Mark the correct statement

  • Electrical synapses are more common in our neural system than chemical synapses
  • The new potential in post synaptic neuron may be either excitatory or inhibitory
  • Hypothalamus is the major coordination centre for sensory and motor signaling
  • The tracts of nerve fibres that connect two cerebral hemispheres are called corpora bigemina

Go through the following characterization of Sympathetic and. Parasympathetic Nervous System.
I. Dilates pupil,
II.  Heart rate, BP (Vasoconstriction)  Glycogenolysis, dilates bronchi.
III. Constricts pupil.
IV. Induces ejaculation.
V. Gastric secretion,  salivary secretion, peristalsis.
VI. Erection and urination.

  • Sympathetic - III, V, VI; Parasympathetic - I, II, IV
  • Sympathetic - I, II, IV; Parasympathetic - III, V, VI
  • Sympathetic M II, IV, VI; Parasympathetic - I, III, V
  • Sympathetic - I, III, V; Parasympathetic - II, IV, VI

Human body temperature is regulated by the centre located in

  • Cerebrum                 

  • Cerebellum

  • Medulla                   

  • Hypothalumus

In the human eye, there are three types of cones – red, blue and green. When these cones are stimulated equally, a sensation for which of the following colors would be produced?

  • White
  • Black
  • Orange
  • Yellow

The vomiting center in the humans is located in the:

  • Medulla oblongata
  • Pons varolii
  • Hypothalamus
  • Thalamus

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Practice Zoology Quiz Questions and Answers