Tag: windows of knowledge

Quizzes (13) Questions (83)

Questions Related to windows of knowledge

Multiple choice biology windows of knowledge human tongue organ of taste tongue : the organ of taste

Receptor absent over tongue is

  1. Thermoreceptor

  2. Gustatoreceptor

  3. Photoreceptor

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A. Thermoreceptors sense temperature change and are present on tongue and skin.
B.  Gustatoreceptors are taste buds present on tongue which sense different tastes.
C. Photoreceptors are the cells that are associated with coloured vision and vision under daylight and low light They are present in eye.
So, the correct answer is 'Photoreceptor'.
Multiple choice biology windows of knowledge human tongue organ of taste tongue : the organ of taste

Bitter taste is perceived by buds present on the tongue at.

  1. Posterior part

  2. Tip

  3. Lateral side

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

Bitter taste receptors are concentrated at the posterior part (back) of the tongue. This is thought to be an evolutionary mechanism to trigger a gag reflex for potentially toxic substances.

Multiple choice biology windows of knowledge human tongue organ of taste tongue : the organ of taste

Tongue has

  1. Baroreceptors

  2. Olfactoreceptors

  3. Gustatoreceptors

  4. Tangoreceptors
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A. Baroreceptors are mechanoreceptors present in the blood vessels and sense pressure changes.
B. Olfactoreceptors are present in nasal cavity and sense smell.
C. Gustatoreceptors are taste buds present on tongue and sense different tastes.
D. Tangoreceptors are present on skin surfaces and sense touch.
So, the correct answer is 'Gustatoreceptors'.
Multiple choice biology windows of knowledge human tongue organ of taste tongue : the organ of taste

The tongue of a person is exposed to a high salty taste, then 

  1. The person learns to taste salty things better

  2. Loves tasting salty things

  3. Hates tasting salty things

  4. Fails to taste a less salty thing just after the exposure
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The tongue of a person is exposed to a high salty taste then the tongue fails to taste a less salty thing just after exposure. This happens because the taste receptors on the surface of the tongue get adapted to the salty taste.

Adaptation mainly occurs at cerebral cortex level.

Multiple choice biology windows of knowledge human tongue organ of taste tongue : the organ of taste

Sense of smell enhances the sense of taste.

  1. True

  2. False
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
Specific chemicals in solution pass into the taste bud through the taste pore to come in contact with the protein receptor sites on the microvilli of the gustatory receptor cells. The latter set up nerve impulses in the sensory nerve fibres. The nerve fibres transmit the impulses to the taste centre in the brain where the sensation of taste arises. The facial nerve serves the anterior two-thirds of the tongue, the glossopharyngeal nerve serves the posterior one-third of the tongue. 
So, the correct answer is 'true'.
Multiple choice biology windows of knowledge human tongue organ of taste tongue : the organ of taste

Which of the following is an incorrect match? 

  1. Filiform papillae: Smallest and most numerous, found mainly in the centre of tongue

  2. Fungiform papillae: Most numerous, near the base of tongue

  3. Foliate papillae: Not developed in the adult human tongue

  4. Vallate papillae: Largest papillae , each surrounded by a circular groove
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

In tongue, small structures called papillae are present. They are mainly of four types- filiform papillae, fungiform papillae, foliate papillae, circumvallate papillae. Most of them are associated with taste buds. The filiform papillae are the smallest amongst the four and are most numerous. They are scattered throughout the dorsal surface of the tongue and not just at the center of the tongue.

So, the correct answer is 'Filiform papillae: Smallest and most numerous, found mainly in the centre of tongue'.

Multiple choice biology windows of knowledge human tongue organ of taste tongue : the organ of taste

The function of tongue is to

  1. Help in the act of swallowing

  2. Help in mixing saliva with the food

  3. Help in digestion of food

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The function of the tongue is to help in the act of swallowing and help in mixing saliva with the food. It is a muscular organ in the mouth. It is vital for chewing and swallowing food, as well as for speech. It consists of eight interwoven, striated muscles that can move in any direction, making it quite flexible. So, the correct answer is option C.

Multiple choice biology windows of knowledge human tongue organ of taste tongue : the organ of taste

Milk contains a sugar called

  1. Galactose

  2. Lactose

  3. Maltose

  4. Sucrose
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
A. Galactose is a monosaccharide sugar as sweet as glucose. It is found in butter, butter milk, buttermilk, cheese, cream and gums.
B. Lactose is a disaccharide sugar composed of galactose and glucose. Lac in Latin means milk. It comprises about 2-8 % of milk by weight so, it is important constituent of milk. It is also called as milk sugar. Other sources are buttermilk, cheese and cream.
C. Maltose is a disaccharide sugar composed of two units of glucose. It is found in germinating seeds, also called as malt sugar. It is found in cereals, pizza, and bread products.
D. Sucrose is a disaccharide sugar composed of glucose and fructose. It is also called as table sugar. It is found in sugarcane.
So, the correct answer is 'Lactose'.