[26 Sep] S3: Comprehensive Revision VI

Which of the following correctly describes the function of the sensory neurone?

• transmits nerve impulses directly to the motor neurone

• transmits nerve impulses from the central nervous system to the effectors

• transmits nerve impulses from the sensory neurone to the motor neurone

• transmits nerve impulses from the sense organs to the central nervous system

Which of the following is/are example(s) of cranial reflexes?

• blinking

• knee-jerk reflex

• pupil reflex

• salivation

Which of the following correctly describes a reflex arc?

• the longest pathway by which nerve impulses travel from the receptor to the effector in a reflex action

• the shortest pathway by which nerve impulses travel from the receptor to the central nervous system in a reflex action

• the shortest pathway by which nerve impulses travel from the central nervous system to the effector in a reflex action

• the shortest pathway by which nerve impulses travel from the receptor to the effector in a reflex action

Our eyes feel strained when we read small prints for a long period of time. Which of the following is the correct explanation for the incident described above?

• The ciliary muscles become fatigued.

• The optic nerve will no longer transmit impulses to the brain.

• The retina will no longer record clear images.

• The suspensory ligaments become stretched.

Which of the following would be a consequence of the optic nerve being cut?

• An image would not be formed on the retina.

• The brain would not be able to send any nerve impulses.

• The photoreceptors of the retina cannot be stimulated.

• The pupil reflex would fail to function.