BODY LOGIC
Which gas does your body urgently need from the air?
Oxygen
Which organ pumps blood throughout your body?
Answer: The heart.
You hear a loud sound and turn your head toward it.
What allowed you to detect the sound?
Answer: Your ears/hearing system.
Why do you blink without constantly thinking:
“Now I should blink”?
Answer: Many body functions happen automatically/involuntarily
Where does the useful material from your food go?
Answer: It is digested and absorbed, then transported around the body and used for energy, growth, and repair.
Why does your heart continue beating while you sleep?
Answer: Your body still needs blood, oxygen, nutrients, and waste removal while you sleep.
You touch an ice cube and immediately notice that it is cold.
Which sense is detecting the change?
Answer: Touch.
Why do you sometimes sneeze when something irritates your nose?
Answer: Sneezing is a protective response that helps remove irritants from the nasal passages.
Why is maintaining a fairly constant internal temperature important?
Answer: Many processes in the body work properly only within a suitable temperature range.
You haven't eaten for several hours.
Yet your brain, heart, and muscles are still working.
Where is your body getting the energy it needs?
Answer: From stored energy reserves and nutrients already available in the body
You accidentally touch something very hot and quickly pull your hand away.
Why is this response useful?
Answer: It helps protect your body from injury.
You are extremely thirsty.
You drink water.
A short time later, you feel less thirsty.
What does this tell you about your body?
Answer: Your body can detect changes in its internal condition and respond to them
our breathing becomes faster and your heart beats faster.
Why do BOTH changes happen?
Answer: Working muscles need more oxygen and nutrients and produce more carbon dioxide/waste, so breathing and circulation increase to meet the body's demands.
You exercise intensely and start sweating.
Is sweating making your body hotter or helping it cool down? Explain.
Answer: It helps cool the body. When sweat evaporates from the skin, it removes heat.
You walk into a dark room.
At first, you can barely see. After a few minutes, you can see much better.
What changed?
Answer: Your eyes adapted to the lower amount of light; your pupils enlarge and the visual system adjusts.
You are outside on a freezing day and suddenly begin shivering.
Why would your body make your muscles move rapidly when you're cold?
Answer: Shivering produces heat, helping raise or maintain body temperature.
“The harder I exercise, the more oxygen my body needs.”
Is this always true?
Answer: Generally, yes during increasing physical activity, because muscles require more energy and aerobic respiration uses more oxygen. However, at very high intensity, the body also relies more heavily on anaerobic energy pathways.
Imagine that your heart suddenly stopped pumping blood effectively.
Your lungs could still contain air.
Why would the rest of your body still be in serious trouble?
Answer: Air in the lungs isn't enough. Blood circulation is needed to transport oxygen and nutrients to tissues and remove carbon dioxide and other wastes.
You are watching a football match.
You see a player kick the ball and almost immediately your body reacts—you move your eyes and head to follow it.
What does this tell us about the human body?
Answer: The body can detect information from the environment and rapidly coordinate a response
How can your body keep doing all of this without you consciously controlling every action?
Answer: The body has automatic regulatory and control systems that coordinate many essential processes without conscious control.