Tag: biology

Questions Related to biology

Some persons have an innate sense of direction. It is due to magnetic sensitivity of

biology windows of knowledge human nose nose nose : the olfactory organ

  1. Cochlea

  2. Corpora quadrigemina

  3. Nose

  4. Pinna

Show answer
Correct Option: C
Explanation:

  •  Humans possess a tiny, shiny crystal of magnetite in the ethmoid bone, located between your eyes, just behind the nose.
  •  Magnetite is a magnetic mineral also possessed by homing pigeons, migratory salmon, dolphins, honeybees, and bats is a tiny compass needle, allowing them to orient themselves in the earth's magnetic field and swim down to their happy home in the mud. Hence, Some persons have an innate sense of direction. It is due to the magnetic sensitivity of the Nose.
So, the correct answer is 'Nose'.

Glands whose secretions pick up odoriferous substances to stimulate olfactory nerves are

biology windows of knowledge human nose nose nose : the olfactory organ

  1. Bidder's glands

  2. Cowper's glands

  3. Meibomian glands

  4. Bowman's glands

  5. Ceruminous glands

Show answer
Correct Option: D
Explanation:
Bowman's glands are olfactory glands present in olfactory mucosa below olfactory epithelium. They contain secretory vesicles. They secrete mucous substances that prevent the nasal epithelium from getting dry out. The secretions from these glands pick up odoriferous substances i.e. the substances that have a particular smell, and stimulate olfactory nerves which carry the information related to smell to the brain.
So, the correct answer is 'Bowman's glands'.

Olfactory membrane is connected with __________.

biology windows of knowledge human nose nose nose : the olfactory organ

  1. Taste

  2. Vision

  3. Smell

  4. Hearing

Show answer
Correct Option: C
Explanation:
A. Taste is perceived by taste buds present on tongue.
B. Vision is perceived by photoreceptor cells present in retina and they may be cones (for daylight vison and coloured vision) or rods (for low light vision).
C. Smell is perceived by olfactory membrane which is a structure present in upper part of nasal cavity.
D. Hearing is perceived by organ of Corti in middle ear which contains many hair cells that are sensitive to sounds or vibrations.
So, the correct answer is 'Smell'.

Both olfactory receptors and sound receptors have cilia, and they both

biology windows of knowledge human nose nose nose : the olfactory organ

  1. are chemoreceptors

  2. are mechanoreceptors

  3. initiate nerve impulses

  4. all of these

Show answer
Correct Option: C
Explanation:

 Both olfactory receptors and sound receptors have cilia. The different senses are taste, smell, vision and auditory senses. In humans, specialized sensory receptors are present in distinct sense organs that detect the sensory stimuli and transmit the stimuli as nerve impulses to the brain.


So, the correct answer is 'initiate nerve impulses'.

Anosmia is _____

biology windows of knowledge human nose nose nose : the olfactory organ

  1. Loss of the sense of taste

  2. Loss of the sense of smell

  3. Loss of the sense of sound

  4. Loss of the sense of touch

Show answer
Correct Option: B
Explanation:

The following are disorders of olfaction: Anosmia inability to smell. ysosmia things smell different from memory or expectation. Hyperosmia an abnormally acute sense of smell. Hyposmia decreased ability to smell.

A person aged 21 will probably lose _____ of their smell at 22.

biology windows of knowledge human nose nose nose : the olfactory organ

  1. None

  2. 50%

  3. 1%

  4. 5%

Show answer
Correct Option: C
Explanation:

Fact:
On increasing age,olfactory sensation decreases. In female humans, the sense of olfaction is strongest around the time of ovulation, significantly stronger than during other phases of the menstrual cycle and stronger than the sense in males.

The ability to perceive pheromones is related to the sense of

biology windows of knowledge human nose nose nose : the olfactory organ

  1. audition

  2. gustation

  3. equilibrium

  4. olfaction

Show answer
Correct Option: D
Explanation:

(A)Audition is the sense of hearing.

(B)Gustation is the sense of tasting.
(C)Equilibrium is the equalizing process.
(D)Olfaction is the sense of smell.  It should be noted that some pheromones are detected by the main olfactory system.

So, the correct option is 'Olfaction'.

An increase in albedo would be accompanied by ___________ in radiative equilibrium temperature.

biology human influences on the environment human intervention in ecosystems humans in the environment involvement of humans in the conservation of environment

  1. An increase

  2. A decrease

  3. No change

  4. Unstable oscillations

Show answer
Correct Option: B

Good urban planning is essential for _____________ land use.

biology human influences on the environment human intervention in ecosystems humans in the environment involvement of humans in the conservation of environment

  1. Rational

  2. Irrational

  3. Planned

  4. Unplanned

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Correct Option: A

______________ ecosystems are maintained artificially by man.

biology human influences on the environment human intervention in ecosystems humans in the environment involvement of humans in the conservation of environment

  1. Man-made

  2. Marine

  3. Artificial

  4. Brackish

Show answer
Correct Option: A