Question: Why do cells swell in hypotonic solution?
Answer Choices:
A. Water leaves the cells.
B. Water enters the cells.
C. Salt enters the cells.
Answer: D
Question: What causes red blood cells to shrink in 10% NaCl?
Answer Choices:
A. Water enters
B. Water leaves
C. Salt enters
Answer: B
Question: What happens to a potato in a hypertonic solution?
Answer Choices:
A. Becomes rigid.
B. Becomes limp.
C. Becomes sticky.
Answer: B
Question: Which ion’s movement provides energy for secondary active transport?
Answer Choices:
A. K⁺
B. Na⁺
C. Ca²⁺
Answer: Na⁺
Question: What describes overall effect of placing red blood cells in various solutions?
Answer Choices:
A. Membranes dissolve
B. Water exchange depends on tonicity
C. Cells all shrink
Answer: B
Question: How does oxygen enter the cell?
Answer Choices:
A. Into the cell, down its concentration gradient
B. Active transport
C. Pumped in via ATP
Answer: A
Question: Which term describes an ion channel that opens when ACh binds?
Answer Choices:
A. Voltage-gated
B. Mechanically-gated
C. Ligand-gated
Answer: C
Question: What happens to red blood cells in a hypertonic solution?
Answer Choices:
A. Swell
B. Shrink
C. Stay the same
Answer: C
Question: What happens in 0.9% NaCl solution?
Answer Choices:
A. No net water movement
B. Water leaves
C. Water enters
Answer: A
Question: How does water move in osmosis?
Answer Choices:
A. High water to low water concentration
B. Low solute to high solute concentration
C. High solute to low solute
Answer: A and D
Question: Why does the potato become limp in a hypertonic solution?
Answer Choices:
A. Water leaves the cells.
B. Water enters.
C. No water movement.
Answer: A
Question: How does Na⁺ enter the cell from interstitial fluid?
Answer Choices:
A. Active transport
B. Osmosis
C. Facilitated diffusion
Answer: C
Question: Why does blood become clear in distilled water?
Answer Choices:
A. Cells burst and don’t block light
B. Salt leaks out
C. Cells clump
Answer: A
Question: Which statements are true about active transport?
Answer Choices:
A. Doesn’t need energy
B. Moves substances against gradient
C. Uses ATP
Answer: B and C