A&PI Lecture Exam 1 Review Flashcard
Flashcard
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Biology
•
University
•
Practice Problem
•
Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What is the pH scale?
Back
The pH scale measures the acidity or basicity of a solution, ranging from 0 (very acidic) to 14 (very basic), with 7 being neutral.
2.
FLASHCARD QUESTION
Front
What does a low pH indicate?
Back
A low pH indicates a high concentration of hydrogen ions, meaning the solution is acidic.
3.
FLASHCARD QUESTION
Front
What is a positive feedback loop?
Back
A positive feedback loop is a process that amplifies a change or output, leading to an even greater change in the same direction.
4.
FLASHCARD QUESTION
Front
Give an example of a positive feedback loop in the human body.
Back
Blood clotting after a cut is an example of a positive feedback loop, where the process accelerates until the wound is sealed.
5.
FLASHCARD QUESTION
Front
What do the letters 'D' and 'R' in DNA and RNA stand for?
Back
The 'D' in DNA stands for Deoxyribo, and the 'R' in RNA stands for Ribo.
6.
FLASHCARD QUESTION
Front
What is the primary structure of a protein?
Back
The primary structure of a protein refers to its amino acid sequence, which determines its function and shape.
7.
FLASHCARD QUESTION
Front
What is a polar molecule?
Back
A polar molecule has a distribution of electrical charge that leads to partial positive and negative charges, as seen in water.
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