Podcast
Questions and Answers
What are the two main components of the human nervous system?
What are the two main components of the human nervous system?
- Central nervous system and peripheral nervous system (correct)
- Peripheral nervous system and somatic system
- Central nervous system and cerebral cortex
- Autonomic nervous system and central nervous system
Which of the following is an example of a voluntary action?
Which of the following is an example of a voluntary action?
- Heartbeat regulation
- Breathing
- Sneezing
- Walking (correct)
Which part of the eye helps to focus light directly onto the retina?
Which part of the eye helps to focus light directly onto the retina?
- Cornea (correct)
- Vitreous humour
- Aqueous humour
- Pupil
What is the role of rod cells in the retina?
What is the role of rod cells in the retina?
Which function does the human nervous system NOT perform?
Which function does the human nervous system NOT perform?
What characterizes involuntary actions?
What characterizes involuntary actions?
Which component of the eye is primarily responsible for controlling the amount of light entering the eye?
Which component of the eye is primarily responsible for controlling the amount of light entering the eye?
What is the primary function of the aqueous humour in the eye?
What is the primary function of the aqueous humour in the eye?
Flashcards
Central Nervous System
Central Nervous System
The brain and spinal cord, responsible for processing information and issuing commands to the body.
Peripheral Nervous System
Peripheral Nervous System
All the nerves outside the brain and spinal cord, responsible for carrying information to and from the central nervous system.
Voluntary Actions
Voluntary Actions
Actions that are consciously controlled by the brain, like writing, speaking, or eating.
Involuntary Actions
Involuntary Actions
Signup and view all the flashcards
Sclera
Sclera
Signup and view all the flashcards
Cornea
Cornea
Signup and view all the flashcards
Rod Cells
Rod Cells
Signup and view all the flashcards
Cone Cells
Cone Cells
Signup and view all the flashcards
Study Notes
Human Nervous System
- The human nervous system is made up of the central nervous system and the peripheral nervous system
- The central nervous system includes the brain and spinal cord
- The peripheral nervous system includes cranial nerves (12 pairs) and spinal nerves (31 pairs)
Function of Human Nervous System
- Controls and coordinates organs and body parts
- Detects stimuli
- Sends information in the form of impulses
- Interprets impulses
- Produces appropriate responses
Voluntary Actions
- Conscious actions, such as writing, reading, singing, eating, and walking;
- Conscious actions are controlled by the brain
Involuntary Actions
- Occur immediately without conscious control or prior thoughts, such as heartbeat, breathing, peristalsis, secretion of saliva, and sneezing.
- Can be classified into two:
- Actions involving the medulla oblongata, including heartbeat, breathing, and peristalsis
- Actions involving the spinal cord (reflex actions), such as sneezing when dust enters the nose
Structure of the Eye
- The retina has two photoreceptors:
- Rod cells – sensitive to different light intensities
- Cone cells – sensitive to colours of light.
Studying That Suits You
Use AI to generate personalized quizzes and flashcards to suit your learning preferences.
