Homeostasis Practice 1

Multiple Choice

Which process represents a balance of glucose in the bloodstream maintained by insulin?

• homeostasis

• metabolism

• osmosis

• adaptation

Multiple Choice

Which substance is least able to diffuse through the lipid bilayer of the plasma membrane?

• water

• oxygen

• carbon dioxide

• protein

Multiple Choice

How does a cell maintain homeostasis?

• by creating a nitrogen-rich environment suitable for the production of amino acids and proteins

• by keeping the DNA contained within the nucleus so that mRNA can produce proteins

• by selectively allowing nutrients in and eliminating excess ions and waste material

• by creating an isolated location for mitosis and meiosis to create new cells during cell division

Multiple Choice

Which scenario below could be used to represent how a cell uses active transport to move molecules across a membrane?

• A car driving through a mountain tunnel

• wind blowing a sailboat in the ocean

• a fish swimming upstream

• 
  a child riding a bike down a hill

Multiple Choice

Which is needed for living organisms to perform active transport to maintain homeostasis?

• water

• 
  oxygen

• 
  ATP

• CO₂

Multiple Choice

Which choice best explains how the body maintains a narrow range in pH?

Answer choices

• by modifying enzymes

• 
  by using passive transport

• by using buffering systems

• 
  by decreasing ATP production

Multiple Choice

Which would most likely occur if there was a change in the pH in the cell’s cytosol?

Answer choices

• The nucleus would produce more lipids.

• The vacuole would adjust its intake of H⁺

• The mitochondria would produce more energy.

• The smooth endoplasmic reticulum would produce more lipids.