Tag: biology

Quizzes (1160) Questions (12174)

Questions Related to biology

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

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

  1. Cochlea

  2. Corpora quadrigemina

  3. Nose

  4. Pinna
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

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

  1. Bidder's glands

  2. Cowper's glands

  3. Meibomian glands

  4. Bowman's glands

  5. Ceruminous glands
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.
Multiple choice biology windows of knowledge human nose nose nose : the olfactory organ

Olfactory membrane is connected with __________.

  1. Taste

  2. Vision

  3. Smell

  4. Hearing
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.
Multiple choice biology windows of knowledge human nose nose nose : the olfactory organ

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

  1. are chemoreceptors

  2. are mechanoreceptors

  3. initiate nerve impulses

  4. all of these
Reveal answer Fill a bubble to check yourself
C Correct answer
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'.

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

Anosmia is _____

  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
Reveal answer Fill a bubble to check yourself
B Correct answer
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.

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

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

  1. None

  2. 50%

  3. 1%

  4. 5%
Reveal answer Fill a bubble to check yourself
C Correct answer
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.

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

The ability to perceive pheromones is related to the sense of

  1. audition

  2. gustation

  3. equilibrium

  4. olfaction
Reveal answer Fill a bubble to check yourself
D Correct answer
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'.

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

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

  1. An increase

  2. A decrease

  3. No change

  4. Unstable oscillations
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Albedo is the measure of reflectivity of a surface. An increase in albedo means more solar radiation is reflected back into space, which results in less energy being absorbed by the Earth, leading to a decrease in the radiative equilibrium temperature.

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

Good urban planning is essential for _____________ land use.

  1. Rational

  2. Irrational

  3. Planned

  4. Unplanned
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Good urban planning focuses on the organized and efficient use of land. Rational land use ensures that resources are allocated effectively to meet the needs of the population.

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

______________ ecosystems are maintained artificially by man.

  1. Man-made

  2. Marine

  3. Artificial

  4. Brackish
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Ecosystems that are maintained or created by human intervention are referred to as man-made or artificial ecosystems. Examples include agricultural fields, gardens, and reservoirs.