SCIENCE FORM 3 UNIT 1

1. Which of the following parts of body are included in the central nervous system?

• Brain

• Cranial Nerve

• Spinal Nerve

• Spinal Cord

Which of the pathway of nerve impulses as shown is correct?

• Stimulus-->Effector-->Central nervous system-->Receptor-->Response

• Response-->Effector-->Central nervous system-->Receptor-->Stimulus

• Stimulus-->Receptor-->Central nervous system-->Effector-->Response

• Response-->Receptor-->Central nervous system-->Effector-->Stimulus

Which of the following is not an example of involuntary actions involving medulla oblongata?

• Breathing

• Peristalsis

• Digestion

• Scream when stepped on a pin

There are two types of photoreceptor cells, namely...

• Cone cell

• Rod cell

• Light cell

• 
  Pod cell

Which of the following is not a part of retina?

• Yellow spot

• 
  Blind spot

• Vitreous humour

• 
  Aqueous humour

Which part of the eye maintains the shape of the eyeball?

• Optic nerve

• 
  Vitreous humour

• Conjuctiva

• Aqueous humour

Which of the following is not a part of the middle ear?

• Ossicles

• Cochlea

• Ear canal

• Eardrum

Which part of the mechanism of hearing is wrong?

• 
  Eardrum-->Ear canal

• Cochlea-->Auditory nerve

• Ossicles-->Oval window

• Oval window-->Cochlea

Why does blind people use their fingertips to read Braille?

• They have a thick epidermal layer

• 
  They have a thin epidermal layer

• They have many receptors

• 
  They have less receptors

Which of the following is not a type of receptor in skin?

• Touch receptor

• 
  Hot receptor

• Cold receptor

• Pressure receptor