Human nervous system

• What is the primary function of the nervous system?

  React to surroundings
• The central nervous system coordinates an appropriate response
• Electrical impulses are sent along motor neurones to the effector.
• What is the correct sequence of events in the nervous system?

  1️⃣ Stimulus

  2️⃣ Receptor

  3️⃣ Coordinator

  4️⃣ Effector

  5️⃣ Response
• What is a reflex action?

  Automatic and rapid response
• Reflex actions involve conscious input from the brain.

  False
• In a reflex arc, an electrical impulse passes along a sensory neurone to the spinal cord.
• What is the function of the cerebral cortex?

  Controls consciousness and memory
• The cerebellum controls muscular coordination.
• How does the iris adjust the pupil size in bright light?

  1️⃣ Circular muscles contract

  2️⃣ Radial muscles relax

  3️⃣ Pupil becomes smaller
• Accommodation refers to the ability of the lens to change shape to focus on near or distant objects.
• Myopia can be treated using glasses with a concave lens.
• What type of lens is used to treat hyperopia?

  Convex lens
• Match the type of contact lens with its property:

  Hard ↔️ Rigid material

  Soft ↔️ Flexible material
• What is the purpose of laser eye surgery in treating myopia?

  Reduces corneal thickness
• The thermoregulatory centre in the hypothalamus controls body temperature.
• When the body temperature is too high, sweating leads to heat loss through evaporation.
• What physiological changes occur when the body temperature is too low?

  1️⃣ Vasoconstriction

  2️⃣ Shivering

  3️⃣ Sweating stops
• What is the name of the outermost layer of the human eye, labeled as F in the diagram?

  Sclera

  
• Which part of the eye is labeled 'A' in the diagram?

  Lens

  
• What is the structure labeled A in the diagram of the human eye?

  Cornea

  
• The structure labeled B in the diagram is called the pupil

  
• What is the part of the eye labeled 'A' in the diagram?

  Cornea

  
• What is the structure labeled A in the image?

  Cerebellum

  
• What part of the eye is labeled 'A' in the diagram?

  Cornea

  
• The eye structure labeled 'B' in the diagram is the iris

  
• What part of the eye is labeled 'A'?

  Cornea

  
• What is the name of the part of the brain labeled A in the diagram?

  Cerebellum

  
• The brainstem is labeled as B

  
• What part of the brain does label A point to?

  Cerebellum

  
• Which structure in the eye is labeled 'B' in the diagram?

  Lens

  
• What is the structure labeled B in the image?

  Brainstem

  
• What part of the eye is labeled 'G'?

  Optic nerve

  
• What part of the brain does label B indicate?

  Brainstem