biology MCQs - 10th class Chapter 03 Mcqs

1

Which system brings about nervous coordination in animals?

A

Endocrine system

B

Nervous system

C

Circulatory system

D

Digestive system

2

Any change in the environment that can provoke a response is called a?

A

Response

B

Effector

C

Stimulus

D

Receptor

3

In nervous coordination, which of the following act as coordinators?

A

Muscles and glands

B

Brain and spinal cord

C

Sense organs

D

Nerves

4

Which part of a neuron conducts impulses away from the cell body?

A

Dendrite

B

Axon

C

Myelin sheath

D

Cell body

5

What is the fatty layer secreted by Schwann cells over axons called?

A

Nodes of Ranvier

B

Grey matter

C

Myelin sheath

D

Meninges

6

Nerve impulses that jump from one node of Ranvier to another are called?

A

Standard impulses

B

Saltatory impulses

C

Reflex impulses

D

Resting impulses

7

Which type of neurons form the brain and spinal cord?

A

Sensory neurons

B

Motor neurons

C

Mixed neurons

D

Interneurons

8

A group of neuron cell bodies enveloped by a membrane outside the CNS is called a?

A

Nerve

B

Tract

C

Ganglion

D

Nucleus

9

Which protective layers cover the brain and spinal cord?

A

Ventricles

B

Meninges

C

Cranium

D

Vertebrae

10

The fluid found within the ventricles of the brain and the central canal of thespinal cord is?

A

Plasma

B

Lymph

C

Cerebrospinal fluid (CSF)

D

Aqueous humour

11

Which part of the forebrain is the largest and controls thinking and intelligence?

A

Thalamus

B

Hypothalamus

C

Cerebrum

D

Pons

12

The hypothalamus links the nervous system with which other system?

A

Circulatory system

B

Endocrine system

C

Respiratory system

D

Muscular system

13

The upper layer of the cerebral hemispheres, consisting of grey matter, is called?

A

Cerebral medulla

B

Corpus callosum

C

Cerebral cortex

D

Hippocampus

14

The frontal lobe of the cerebrum is primarily responsible for?

A

Hearing and smell

B

Visual information

C

Motor functions and speech

D

Receiving impulses from skin

15

Which part of the brain connects the forebrain and hindbrain?

A

Midbrain

B

Pons

C

Medulla oblongata

D

Cerebellum

16

Which part of the hindbrain controls breathing, heart rate, and blood pressure?

A

Cerebellum

B

Pons

C

Midbrain

D

Medulla oblongata

17

How many pairs of spinal nerves arise from the spinal cord in humans?

A

12

B

24

C

31

D

43

18

The autonomic nervous system is divided into which two systems?

A

Somatic and Central

B

Central and Peripheral

C

Sympathetic and Parasympathetic

D

Sensory and Motor

19

Which system is responsible for the 'fight or flight' response?

A

Somatic nervous system

B

Parasympathetic nervous system

C

Sympathetic nervous system

D

Central nervous system

20

The pathway followed by nerve impulses for producing a reflex action is called a?

A

Reflex action

B

Reflex arc

C

Reflex stimulus

D

Reflex response

21

Which layer of the eye contains photosensitive cells like rods and cones?

A

Sclera

B

Choroid

C

Retina

D

Cornea

22

The transparent front part of the sclera is the?

A

Iris

B

Pupil

C

Lens

D

Cornea

23

The size of the pupil is adjusted by the muscles of the?

A

Iris

B

Retina

C

Choroid

D

Sclera

24

Which cells in the retina are responsible for colour vision?

A

Rods

B

Cones

C

Ganglion cells

D

Bipolar cells

25

The point on the retina where the optic nerve enters, creating a blind spot, is the?

A

Fovea

B

Optic disc

C

Macula

D

Choroid

26

The pigment found in rods, which is essential for night vision, is called?

A

Iodopsin

B

Melanin

C

Rhodopsin

D

Hemoglobin

27

A deficiency of which vitamin causes night blindness?

A

Vitamin C

B

Vitamin D

C

Vitamin B

D

Vitamin A

28

Myopia, or short-sightedness, is corrected using which type of lens?

A

Convex lens

B

Concave lens

C

Bifocal lens

D

Cylindrical lens

29

The external ear consists of the pinna, auditory canal, and?

A

Cochlea

B

Stapes

C

Ear drum

D

Eustachian tube

30

Which of these is the smallest bone in the human body, located in the middle ear?

A

Malleus

B

Incus

C

Stapes

D

Hyoid

31

Which part of the inner ear is primarily responsible for hearing?

A

Vestibule

B

Semicircular canals

C

Cochlea

D

Auditory nerve

32

Which parts of the ear help in maintaining the body's balance?

A

Pinna and ear drum

B

Cochlea and oval window

C

Vestibule and semicircular canals

D

Malleus and incus

33

Hormones are chemicals secreted by which type of glands?

A

Exocrine glands

B

Salivary glands

C

Endocrine glands

D

Digestive glands

34

The pituitary gland is attached to which part of the brain?

A

Cerebrum

B

Cerebellum

C

Pons

D

Hypothalamus

35

Which hormone promotes the growth of the body?

A

Thyroxin

B

Insulin

C

Somatotrophin

D

Adrenaline

36

Excessive production of somatotrophin after growing age leads to a condition called?

A

Gigantism

B

Dwarfism

C

Acromegaly

D

Goitre

37

Which hormone is also known as Antidiuretic Hormone (ADH)?

A

Oxytocin

B

Vasopressin

C

TSH

D

Glucagon

38

Diabetes insipidus is caused by the insufficient secretion of which hormone?

A

Insulin

B

ADH

C

Thyroxin

D

Glucagon

39

The thyroid gland requires which element to produce thyroxin?

A

Calcium

B

Potassium

C

Iodine

D

Sodium

40

Which hormone increases the level of calcium ions in the blood?

A

Calcitonin

B

Parathormone

C

Insulin

D

Thyroxin

41

Which gland secretes the emergency hormone, adrenaline?

A

Pituitary gland

B

Thyroid gland

C

Pancreas

D

Adrenal gland

42

The islets of Langerhans are found in which organ?

A

Liver

B

Kidney

C

Pancreas

D

Spleen

43

Which hormone is secreted when blood glucose concentration is high?

A

Glucagon

B

Insulin

C

Somatotrophin

D

Adrenaline

44

Diabetes mellitus is caused by the insufficient production of?

A

Glucagon

B

ADH

C

Insulin

D

Thyroxin

45

Which hormone is responsible for the development of male secondary sex characters?

A

Estrogen

B

Progesterone

C

Testosterone

D

Oxytocin

46

In negative feedback, the output of a process does what to the process?

A

Increases it

B

Decreases or inhibits it

C

Has no effect

D

Speeds it up indefinitely

47

Paralysis is most often caused by damage to the?

A

Peripheral nervous system

B

Endocrine system

C

Central nervous system

D

Muscular system

48

Epilepsy is a nervous disorder characterized by?

A

Muscle weakness

B

Loss of memory

C

Abnormal discharge of nerve impulses

D

Hormonal imbalance

49

The chemical coordination is brought about by which system?

A

Nervous system

B

Circulatory system

C

Endocrine system

D

Respiratory system