Answers PA Human Anatomy Physiology A 2026-2027 SMITH IC Lab: Diffusion Across a Semi-permeable MembraneQuestion 2

2

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Lab: Diffusion Across a Semi-permeable Membrane

Question 2 • PA Human Anatomy & Physiology A 2026-2027 SMITH IC

Which part of the cell is semipermeable, or controls what enters and leaves the cell? mitochondrioncytoplasmendoplasmic reticulum✔ cell membrane

Answer

A

mitochondrion

B

cytoplasm

C

endoplasmic reticulum

D

✔ cell membrane

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