COPY: Biology iGCSE Flashcards
37 Questions
0 Views

Choose a study mode

Play Quiz
Study Flashcards
Spaced Repetition
Chat to Lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is adrenaline?

Often very rapid, lasts for a short period.

What is diffusion?

When particles move from a region of higher concentration to a lower concentration as a result of their random movement until equilibrium is met.

Types of neurones include __________.

Motor neurones, Sensory neurones, Relay neurones.

What is osmosis?

<p>Net movement of water molecules from a region of high water potential to a low water potential region through a semi-permeable membrane.</p> Signup and view all the answers

What is sensitivity in biological terms?

<p>The ability to detect and respond to changes in the environment.</p> Signup and view all the answers

Which factors affect diffusion? (Select all that apply)

<p>Surface area (A), Distance molecules have to travel (B), Concentration gradient (C)</p> Signup and view all the answers

What is turgidity?

<p>Swelling caused by osmosis, generally in plant cells.</p> Signup and view all the answers

What is plasmolysis?

<p>When the cell's sap vacuole shrinks and becomes flaccid; when the cytoplasm shrinks back from the cell wall.</p> Signup and view all the answers

What are enzymes?

<p>Catalysts that speed up chemical reactions but remain unchanged in the end. They are proteins that function as biological catalysts.</p> Signup and view all the answers

How does temperature affect enzymes?

<p>Temperature increase results in greater kinetic energy; the optimum temperature is when the maximum rate of reaction occurs; past the optimum, enzymes denature.</p> Signup and view all the answers

How does pH affect enzymes?

<p>Varies for different enzymes; can change the shape of the active site and denature it.</p> Signup and view all the answers

Which of these are industrial uses of enzymes? (Select all that apply)

<p>Germination of barley seeds (B), Extraction of fruit juice (C), Industrial fermentation (D)</p> Signup and view all the answers

What is the anaerobic formula for muscle?

<p>Glucose &gt; Lactic acid + Energy.</p> Signup and view all the answers

What is the aerobic formula for respiration?

<p>Glucose + Oxygen &gt; Energy + Carbon dioxide + Water.</p> Signup and view all the answers

Which of the following are solutions to coronary heart disease? (Select all that apply)

<p>Angioplasty (A), Bypass surgery (B)</p> Signup and view all the answers

What are the elements found in proteins?

<p>Carbon, Hydrogen, Oxygen, Nitrogen.</p> Signup and view all the answers

What are the elements found in carbohydrates and fats?

<p>Carbon, Hydrogen, Oxygen.</p> Signup and view all the answers

What are the elements in nucleic acids?

<p>Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorus.</p> Signup and view all the answers

What is a synapse?

<p>Junction between two neurones.</p> Signup and view all the answers

What is an involuntary action? (Select all that apply)

<p>Automatic (A), Stimulus always leads to the same response (B), Fixed response (C)</p> Signup and view all the answers

What is homeostasis?

<p>Maintenance of a constant internal environment.</p> Signup and view all the answers

What is a nerve impulse?

<p>An electrical signal that passes along nerve cells called neurones.</p> Signup and view all the answers

What is deamination?

<p>Removal of amino acids from urea; happens in the liver.</p> Signup and view all the answers

Where does protein digestion happen?

<p>Stomach.</p> Signup and view all the answers

Where does insulin production happen?

<p>Pancreas.</p> Signup and view all the answers

Where is most water reabsorbed?

<p>Jejunum (small intestine).</p> Signup and view all the answers

How do antibodies provide protection from viruses and bacteria?

<p>They attach themselves to the virus or bacteria, stopping division and helping phagocytes engulf the virus or bacteria.</p> Signup and view all the answers

What nutrients are absorbed by proteins?

<p>Amino acids.</p> Signup and view all the answers

What nutrients are absorbed by carbohydrates?

<p>Glucose.</p> Signup and view all the answers

What nutrients are absorbed by lipase?

<p>Fatty acids and glycerol.</p> Signup and view all the answers

What are effects of adrenaline? (Select all that apply)

<p>Rate of breathing increases (B), Heart rate is faster (D)</p> Signup and view all the answers

What is respiration?

<p>Release of energy from food substances, occurring in all living cells.</p> Signup and view all the answers

What is the formula for respiration?

<p>Glucose + Oxygen &gt; Energy + Carbon dioxide + Water.</p> Signup and view all the answers

What is ATP?

<p>Energy; Adenosine triphosphate.</p> Signup and view all the answers

What are hydrophytes?

<p>Aquatic plants.</p> Signup and view all the answers

What are xerophytes?

<p>Desert plants.</p> Signup and view all the answers

What is peristalsis movement?

<p>Responsible for the transportation of chime along the path of the small intestine.</p> Signup and view all the answers

More Like This

Use Quizgecko on...
Browser
Open
Browser
Browser