Nature of Science
Why does scientific knowledge change over time?
Ideas change as new information is collected and interpreted
After using a public shower Mike notices his foot is itchy and red. His doctor tells him he has caught Athlete's Foot. What type of organism caused it?
Fungus
A track star is running a race, their muscles signal to the body that they need extra oxygen, what system would be able to deliver this to the muscles?
circulatory
The lungs are part of what system?
Respiratory
What system controls everything our body does?
the nervous system
In ancient times scientist Galen thought blood was made in the liver and used up by the organs. In time science found blood was pumped by the heart and used over and over. What describes how the ideas changed?
The ideas were REFINED over time.
Covid 19 is an example of this.
Virus
This system removes liquid waste from the body.
Excretory
The main function of the large intestine is to do what?
Remove liquid from undigested food and form solid waste
Our body systems fight to maintain __________ in our bodies. (to keep everything in balance)
homeostasis
The timeline of DNA discovery from 1869 until now shows what about our knowledge?
Our knowledge of DNA increased as new information was discovered.
This type of infectious agent is a living organism that feeds off of a host animal
Parasite
These two systems interact with each other to move nutrients throughout the body and fight infection, keeping the body in homeostasis.
Circulatory and Digestive systems
Digestion starts in this part of the body
mouth
Which system delivers all the nutrients, oxygen, and other needs to all of the other systems?
Circulatory
What infectious agent can make its own food, does NOT need a host cell to reproduce, is single celled, and does not have a nucleus.
Bacterium
Bacteria has DNA, Viruses can have DNA or RNA
So something they have in COMMON is that they both have ____________ material.
Genetic
These two systems work together to transport oxygen throughout the body and remove carbon dioxide.
Circulatory and Respiratory
The bladder's main purpose is:
To hold liquid waste (urine) until it leaves the body
What are some things that can be done to keep body systems healthy and reduce risk of infection and disease?
-Eat healthy foods
-get plenty of sleep
-exercise
-wash hands
this infectious agent is the only one that can have DNA or RNA, and is non-living.
Virus
Infections caused by bacteria can often be treated with what?
Antibiotics (like penicillin, amoxicillin, cipro, etc.)
The three main components of the nervous system are:
Brain, spinal cord, and nerves
This system gives the body its shape
skeletal
As new information is found and old information is reevaluated what happens to scientific ideas?
they are refined and improved