Podcast
Questions and Answers
What is the main role of the nervous system?
What is the main role of the nervous system?
To coordinate the activities of the body.
What are the two main parts of the central nervous system?
What are the two main parts of the central nervous system?
Brain and spinal cord.
What are the tiny gaps between neurons called?
What are the tiny gaps between neurons called?
Synapses.
What are the long, thin fibers that carry impulses away from the cell body?
What are the long, thin fibers that carry impulses away from the cell body?
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What are the short, branched fibers that receive impulses from other neurons?
What are the short, branched fibers that receive impulses from other neurons?
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What part of the brain controls voluntary movements?
What part of the brain controls voluntary movements?
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What part of the brain coordinates movements and balance?
What part of the brain coordinates movements and balance?
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What part of the brain controls essential life functions like breathing and heartbeat?
What part of the brain controls essential life functions like breathing and heartbeat?
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What are the nerves that connect the central nervous system to the rest of the body called?
What are the nerves that connect the central nervous system to the rest of the body called?
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What type of neurons carry impulses from sensory organs to the CNS?
What type of neurons carry impulses from sensory organs to the CNS?
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What type of neurons carry impulses from the CNS to muscles and glands?
What type of neurons carry impulses from the CNS to muscles and glands?
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What are the neurons that connect neurons within the CNS called?
What are the neurons that connect neurons within the CNS called?
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What are the specialized cells in sense organs that detect specific stimuli called?
What are the specialized cells in sense organs that detect specific stimuli called?
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What are the chemical messengers that transmit signals across synapses?
What are the chemical messengers that transmit signals across synapses?
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What is the ability to detect stimuli (changes in environment) called?
What is the ability to detect stimuli (changes in environment) called?
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What is the process of converting stimuli into nerve impulses called?
What is the process of converting stimuli into nerve impulses called?
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What is the ability of an organism to respond to stimuli called?
What is the ability of an organism to respond to stimuli called?
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What is the specific response of an organism to a stimulus called?
What is the specific response of an organism to a stimulus called?
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Match the sense organs to their respective functions:
Match the sense organs to their respective functions:
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The nervous system is only involved in voluntary actions.
The nervous system is only involved in voluntary actions.
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What are the two main types of reflexes?
What are the two main types of reflexes?
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What is the immediate, rapid, and automatic response to a stimulus called?
What is the immediate, rapid, and automatic response to a stimulus called?
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Reflex actions involve the brain.
Reflex actions involve the brain.
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What are the chemicals that carry impulses back to the effector (muscles or glands) called?
What are the chemicals that carry impulses back to the effector (muscles or glands) called?
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Study Notes
Effects of Smoking
- Smoking is bad for the body & lungs
- COPD (Chronic Obstructive Pulmonary Disease) is a lung disease caused by smoking
- Smoking causes lung cancer
- Emphysema is a lung disease caused by smoking (lung tissue damage)
- Smoking causes the body to absorb less oxygen
- Carbon dioxide in the blood increases
- Rate of breathing increases,
- Volume of breath increases
- Blood vessels in the lungs constrict
- Lung tissue & air passages swell
- Blood vessels in the body can also constrict causing slower blood flow to the tissues of the body
- The rate of gas exchange decreases
- Blood becomes more acidic
- This causes problems with breathing and body functions
- Breathing rate increases to get more oxygen to the body
- Difficulty breathing, fatigue and shortness of breath are some of the symptoms caused by smoking
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