2023.01.07_Revision Chapter 1

Involuntary actions can be classified into two groups. Which of the following actions involve medulla oblongata?

I Sneeze

II Heartbeat

III Secretion of saliva

IV Withdrawing hand when accidentally in contact with hot object

• I and II

• III and IV

• II and III

• I and IV

What is the importance of hydrotropism in plants?

• Enables roots to absorb water to carry out photosynthesis and also absorb dissolved mineral salts

• To strengthen the position of plants in the soil

• To protect the plant from enemies or harmful environment

• To increase soil grip

What is the function of brain in human nervous system?

• Controls involuntary action

• As the centre of receiving and interpreting impulses

• Transmit impulses between the spinal cord and the other body parts

• Produces responses

Which of the following is true about cone cells?

• Sensitive to colour

• Produces black-colored vision

• Function when in dim

• Located in sclera

Where are sensory cells in the nose located?

• At the roof of the nasal cavity

• In the inner side of the nostril

• At the end of nasal cavity

• In the nerve

Receptor -> Spinal cord -> Effector

Which of the following actions will pass through the same impulse pathway?

• Breathing

• Knee-jerk reaction

• Thinking

• Walking

The following information shows the taste pathway.

Dissolved substance -> P -> Impulse -> Q -> Type of taste

• P: Saliva

  Q: Tongue

• P: Tongue

  Q: Brain

• P: Taste receptor

  Q: Brain

• P: Saliva

  Q: Taste receptor

Hearing using both ears is known as __ hearing.

• monocular

• monophonic

• stereophonic

• stereoscopic

Tropism X responds to a light stimulus. What is tropism X?

• Geotropism

• Phototropism

• Hydrotropism

• Thigmotropism

Geotropism is the response of plants towards _

• water

• gravity

• light

• touch