Two patients with eye problems:

  • Where are rod and cone cells located?

In the retina of the eye.

  • How are rod cells important?

They help in dim light vision (night vision).

  • What problems will patient B (cone cell defect) face?

Color blindness and difficulty seeing in bright light.

Related Questions:

  1. Differentiate between the following: Cerebrum and cerebellum Sensory and motor neuron Voluntary and involuntary action Nerve impulse and hormonal transmission Short-sightedness and long-sightedness Rods and cones Endocrine glands and exocrine glands Negative and positive feedback mechanisms
  2. Why do plants have a very slow response to stimuli?
  3. Name the parts of the human brain.
  4. Name two functions of the cerebellum.
  5. How is the brain protected?
  6. Name the components of a reflex arc.
  7. Name the endocrine glands.
  8. What is negative feedback?
  9. Is it good that impulses travel in only one direction? Why?
  10. Give the proper biological names for each of these parts of the eye: (a) Light-sensitive layer (b) Controls the amount of light entering the eye (c) Delicate, transparent layer at the front of the eye (d) Tough, white, outer layer of the eye (e) Jelly-like substance that keeps the eye in shape (f) Carries nerve impulses to the brain (g) Black middle layer
  11. Why do you feel dizzy when you stop suddenly after rotating your head fast?
  12. How is the spinal cord protected?
  13. What is the relationship between iodine and goiter?
  14. How is insulin important?
  15. What happens to adrenaline secretion during stress? What are its effects?
  16. Why are these scientists famous?
  17. How do endocrine messages differ from nervous messages?
  18. Compare diabetes insipidus and diabetes mellitus:
  19. Explain the process of urine formation in humans.
  20. Discuss the disorders of the human excretory system.