What is exocytosis?
B2.1 Membranes and Transport Flashcard

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•
Biology
•
11th Grade
•
Hard
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1.
FLASHCARD QUESTION
Front
Back
Exocytosis is the process by which cells expel materials in vesicles that fuse with the plasma membrane, releasing their contents outside the cell.
2.
FLASHCARD QUESTION
Front
What does 'hydrophilic' mean?
Back
Hydrophilic literally means 'water loving', referring to substances that are attracted to water.
3.
FLASHCARD QUESTION
Front
What does 'semi-permeable' mean in relation to lipid bilayers?
Back
Semi-permeable means that the lipid bilayer allows some substances to pass through while blocking others.
4.
FLASHCARD QUESTION
Front
What is the difference between saturated and unsaturated fatty acids?
Back
Saturated fatty acids have no double bonds between carbon atoms and contain the maximum number of hydrogen atoms, while unsaturated fatty acids have one or more double bonds.
5.
FLASHCARD QUESTION
Front
What occurs when a neuron reaches threshold potential?
Back
When a neuron reaches threshold potential, voltage-gated sodium channels open, allowing sodium ions to flow into the neuron.
6.
FLASHCARD QUESTION
Front
Define active transport.
Back
Active transport is the movement of substances across a cell membrane against their concentration gradient, requiring energy (ATP).
7.
FLASHCARD QUESTION
Front
What is pinocytosis?
Back
Pinocytosis is a form of endocytosis where the cell engulfs liquid from the surrounding environment.
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