ATI RN
Cells and Tissues Questions and Answers Questions
Question 1 of 5
Which of the following is a function of the smooth endoplasmic reticulum?
Correct Answer: B
Rationale: The smooth ER synthesizes lipids and detoxifies harmful substances.
Question 2 of 5
Which of the following is NOT a part of the endomembrane system?
Correct Answer: D
Rationale: Mitochondria are not part of the endomembrane system.
Question 3 of 5
The movement of molecules from an area of lower concentration to an area of higher concentration using energy is called:
Correct Answer: C
Rationale: Active transport moves molecules against their gradient using energy.
Question 4 of 5
Which form of intracellular signaling involves neurotransmitters being released across synapses?
Correct Answer: B
Rationale: Synaptic signaling uses neurotransmitters across synapses.
Question 5 of 5
Extracellular fluid in adults differs from intracellular fluid in that its
Correct Answer: D
Rationale: Extracellular fluid has a higher sodium:potassium ratio (e.g., 140:4 mEq/L) compared to intracellular fluid (e.g., 10:140 mEq/L) due to the sodium-potassium pump.