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Quiz Chapter 1: Stimuli and Responses

10 questions ยท Form 3 Science Bab 1: Stimuli and Responses

Question 1 of 10Score: 0

Which basic taste detected by the human tongue corresponds to savory flavors rich in glutamates?

Full Question List & Answer Key

Prefer reading to quizzing? All 10 questions are listed below with the answer and explanation under each one.

1. Which basic taste detected by the human tongue corresponds to savory flavors rich in glutamates?

  1. Salty
  2. Bitter
  3. Sour
  4. Umami
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Answer: D

Umami is the fifth basic taste, classified as a savory taste found in meat, cheese, and monosodium glutamate (MSG).

2. Which component forms part of the central nervous system in humans?

  1. Spinal nerves
  2. Cranial nerves
  3. Spinal cord
  4. Sensory receptors
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Answer: C

The central nervous system consists of the brain and the spinal cord.

3. How do bats navigate and hunt effectively in complete darkness?

  1. By sensing electric fields emitted by prey
  2. By producing ultrasound waves for echolocation
  3. By utilizing lateral line pressure organs
  4. By relying on sensitive infrared heat receptors
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Answer: B

Bats emit ultrasound pulses that bounce off obstacles and prey, using echolocation to create a mental spatial map.

4. What type of lens is used to correct astigmatism?

  1. Biconcave lens
  2. Cylindrical lens
  3. Convex lens
  4. Planoconvex lens
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Answer: B

Astigmatism is caused by irregular curvature of the cornea or lens and is corrected using cylindrical lenses.

5. Which of the following animals possesses stereoscopic (binocular) vision?

  1. Rabbit
  2. Pigeon
  3. Tiger
  4. Deer
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Answer: C

Predatory animals like tigers have eyes at the front of their heads, enabling stereoscopic vision for depth perception while hunting.

6. Which photoreceptor cells in the human retina are responsible for color vision in bright light?

  1. Rod cells
  2. Cone cells
  3. Olfactory cells
  4. Ciliary cells
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Answer: B

Cone cells are sensitive to color (red, green, blue) in bright light, whereas rod cells detect light intensity in dim light.

7. Why does a blind spot exist on the retina of the eye?

  1. It is covered by a thick layer of mucus
  2. It contains only rod cells and no cone cells
  3. The optic nerve leaves the eye, so no photoreceptors are present there
  4. Light cannot pass through the lens at that specific angle
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Answer: C

The blind spot is the point where the optic nerve exits the eyeball; it completely lacks light-sensitive photoreceptor cells.

8. A person cannot see distant objects clearly because light rays focus in front of the retina. What defect do they have and how is it corrected?

  1. Astigmatism; corrected with cylindrical lens
  2. Hyperopia; corrected with convex lens
  3. Myopia; corrected with concave lens
  4. Presbyopia; corrected with bifocal lens
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Answer: C

Short-sightedness (myopia) causes distant light rays to focus in front of the retina. It is corrected using concave lenses to diverge light rays.

9. Which specialized sensory structure allows fish to detect pressure changes and water movement around them?

  1. Lateral line system
  2. Jacobson's organ
  3. Ampullae of Lorenzini
  4. Olfactory bulb
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Answer: A

The lateral line system running along the sides of a fish contains sensory cells that detect water vibrations and pressure changes.

10. Which structure in the brain controls involuntary actions like breathing and heartbeat?

  1. Cerebrum
  2. Cerebellum
  3. Medulla oblongata
  4. Hypothalamus
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Answer: C

Involuntary actions such as heartbeats, peristalsis, and breathing are controlled automatically by the medulla oblongata.

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