Study of microscopic structure of sense organs i.e. eye, ear and integument

Multiple Choice Questions (MCQs)

1. What is the primary function of the cornea?
   • A) Regulate light entry
   • B) Refract light
   • C) Transmit visual signals
   • D) Produce tears
     Answer: B) Refract light
2. Which part of the ear contains hair cells responsible for converting sound vibrations into nerve impulses?
   • A) Pinna
   • B) Cochlea
   • C) Tympanic membrane
   • D) Auditory ossicles
     Answer: B) Cochlea
3. What type of cells in the retina are responsible for color vision?
   • A) Rods
   • B) Cones
   • C) Bipolar cells
   • D) Ganglion cells
     Answer: B) Cones
4. Which layer of skin contains blood vessels and nerve endings?
   • A) Epidermis
   • B) Dermis
   • C) Hypodermis
   • D) Stratum corneum
     Answer: B) Dermis
5. The tympanic membrane is also known as the:
   • A) Eardrum
   • B) Cochlea
   • C) Pinna
   • D) Auditory canal
     Answer: A) Eardrum
6. What is the primary function of melanocytes in the skin?
   • A) Produce keratin
   • B) Produce melanin
   • C) Regulate temperature
   • D) Absorb UV radiation
     Answer: B) Produce melanin
7. Which structure in the eye adjusts its shape to focus light?
   • A) Retina
   • B) Iris
   • C) Lens
   • D) Cornea
     Answer: C) Lens
8. The organ of Corti is located in which part of the ear?
   • A) Outer ear
   • B) Middle ear
   • C) Inner ear
   • D) Auditory canal
     Answer: C) Inner ear
9. Keratinocytes are primarily found in which layer of the skin?
   • A) Dermis
   • B) Epidermis
   • C) Hypodermis
   • D) Subcutaneous layer
     Answer: B) Epidermis
10. What type of glands secrete sebum to lubricate skin and hair?
    • A) Sweat glands
    • B) Sebaceous glands
    • C) Ceruminous glands
    • D) Mammary glands
      Answer: B) Sebaceous glands

True/False Statements

1. The sclera is the transparent part of the eye that refracts light.
   Answer: False (The cornea is transparent; the sclera is opaque.)
2. Rods are responsible for color vision in low light conditions.
   Answer: False (Rods are for low-light vision; cones are for color vision.)
3. The outer ear includes the pinna and external auditory canal.
   Answer: True
4. Sebaceous glands produce sweat to regulate body temperature.
   Answer: False (Sebaceous glands produce sebum; sweat glands produce sweat.)
5. The cochlea contains hair cells that detect sound vibrations.
   Answer: True
6. Melanocytes are found in the dermis layer of the skin.
   Answer: False (Melanocytes are found in the epidermis.)
7. The tympanic membrane separates the outer ear from the middle ear.
   Answer: True
8. The retina contains both rods and cones for light detection.
   Answer: True
9. The hypodermis is primarily made up of epithelial tissue.
   Answer: False (It is made up of loose connective tissue and fat.)
10. Hair cells in the vestibular system are responsible for hearing.
    Answer: False (They are responsible for balance.)

Fill in the Blanks

1. The __________ is responsible for regulating light entry into the eye.
   Answer: iris
2. The __________ contains photoreceptors that convert light into electrical signals.
   Answer: retina
3. The __________ is also known as the eardrum.
   Answer: tympanic membrane
4. __________ are sensory receptors located in the cochlea.
   Answer: Hair cells
5. The outer layer of skin is called the __________.
   Answer: epidermis
6. The __________ secretes sebum to lubricate skin and hair.
   Answer: sebaceous gland
7. The __________ provides structural support and protection to the eye.
   Answer: sclera
8. The __________ system helps maintain balance in animals.
   Answer: vestibular
9. The __________ layer of skin contains blood vessels and nerves.
   Answer: dermis
10. __________ produce melanin, which gives skin its color.
    Answer: Melanocytes