Energy Released by the Electron Transport Chain Is Used to Pump

question 88

Multiple Choice

Energy released by the electron transport chain is used to pump H⁺ into which location in eukaryotic cells?

• A) cytosol
• B) mitochondrial outer membrane
• C) mitochondrial inner membrane
• D) mitochondrial intermembrane space
• E) mitochondrial matrix

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Definitions:

Choroid Plexus

A network of cells lining the ventricles of the brain where cerebrospinal fluid (CSF) is produced, playing a key role in the CSF's production and regulation.

Arachnoid Granulations

Small protrusions of the arachnoid membrane through the dura mater; they allow cerebrospinal fluid to enter the venous system.

Blood-brain Barrier

The blood-brain barrier is a selective barrier that prevents most substances in the blood from entering the brain, protecting it from pathogens and toxins.

Myelin Sheath

Envelope surrounding most axons; formed by Schwann cell membranes being wrapped around the axon.