A mixture is:

A neutral atom always contains the same number of:

A clinician inserts a needle into the pleural cavity to relieve a pneumothorax. The needle is entering a space that normally contains:

Which group of the periodic table contains the most reactive metals?

An epithelial cell is placed in a hypertonic environment. Which change best describes the direction of water movement and the expected cell outcome?

A student is given two samples: one has pH 6.4 and the other has pH 7.4. Which statement best compares their hydrogen ion concentrations?

Which scenario best represents an ionic interaction in the body?

A patient receives an IV fluid that temporarily increases extracellular Na⁺ relative to the inside of some cells. In a short time, Na⁺ begins to enter cells without requiring ATP. Which membrane transport mechanism most likely allows this charged solute to cross the membrane?

A cell has adequate glucose but insufficient oxygen. Which outcome is most likely for ATP production?

A student claims that structure and function are unrelated because two organs can have different shapes. Being the astute anatomy student you are you offer a response to this claim. Which of the following statements offers the best response to this claim?