In Class 11 Final Exams there will be Case studies and Passage Based Questions will be asked, So practice these types of questions. Study Rate is always there to help you. Free PDF Download of CBSE Class 11 Biology Chapter 21 Case Study and Passage Based Questions with Answers were Prepared Based on Latest Exam Pattern. Students can solve NCERT Class 11 Biology Neural Control and Coordination to know their preparation level.

In CBSE Class 11 Biology Paper, There will be a few questions based on case studies and passage-based as well. In that, a paragraph will be given, and then the MCQ questions based on it will be asked.

Neural Control and Coordination Case Study Questions With Answers

Here, we have provided case-based/passage-based questions for Class 11 Biology Chapter 21 Neural Control and Coordination

Case Study/Passage-Based Questions

Case Study 1:

The ears perform two sensory functions, hearing and maintenance of body balance. Anatomically, the ear can be divided into three major sections called the outer ear, the middle ear and the inner ear. The outer ear consists of the pinna and external auditory meatus (canal). The pinna collects the vibrations in the air which produce sound. The external auditory meatus leads inwards and extends up to the tympanic membrane (the ear drum). There are very fine hairs and wax-secreting glands in the skin of the pinna and the meatus. The tympanic membrane is composed of connective tissues covered with skin outside and with mucus membrane inside. The middle ear contains three ossicles called malleus, incus and stapes which are attached to one another in a chain-like fashion. The malleus is attached to the tympanic membrane and the stapes is attached to the oval window of the cochlea. The ear ossicles increase the efficiency of transmission of sound waves to the inner ear. A Eustachian tube connects the middle ear cavity with the pharynx.

The fluid-filled inner ear called labyrinth consists of two parts, the bony and the membranous labyrinths. The bony labyrinth is a series of channels. Inside these channels lies the membranous labyrinth, which is surrounded by a fluid called perilymph. The membranous labyrinth is filled with a fluid called endolymph. The coiled portion of the labyrinth is called cochlea. The membranes constituting cochlea, the reissner’s and basilar, divide the surounding perilymph filled bony labyrinth into an upper scalavestibuli and a lower scala tympani. The space within cochlea called scala media is filled with endolymph. At the base of the cochlea, the scalavestibuli ends at the oval window, while the scala tympani terminates at the round window which opens to the middle ear.The organ of corti is a structure located on the basilar membrane which contains hair cells that act as auditory receptors.

1.) ____________ connects the middle ear cavity with the pharynx.

• a) Eustachian tube
• b) Tympanic membrane
• c) Pinna
• d) Malleus

Ans: a) Eustachian tube

2.) Sound Vibrations collected by pinna, leads inwards and extends up to the ear drum by __________

• a) Labyrinth
• b) Auditory meatus
• c) Tympanic membrane
• d) Scala media

Ans: b) Auditory meatus

3.) What is Scala media?

Ans: The space present within the cochlea is called asScala media. It is filled with endolymph.

4.) Name the middle ear

Ans:The middle ear contains three ossicles called malleus, incus and stapes which are attached to one another in a chain-like fashion.

5.) What is labyrinth?

Ans: The fluid-filled inner ear called labyrinth consists of two parts,

• The bony labyrinths – The bony labyrinth is a series of channels. Inside these channels lies the membranous labyrinth, which is surrounded by a fluid called perilymph.
• The membranous labyrinths – The membranous labyrinth is filled with a fluid called endolymph. The coiled portion of the labyrinth is called cochlea.

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