Drag the tiles to the correct boxes to complete the pairs. Match the modes of transport to the molecules. exocytosis osmosis oxygen water molecule charged amino acid active transport calcium moves from low concentration to high concentration protein from the simple diffusion > carrier proteins
The Correct Answer and Explanation is :
Answer:
- Exocytosis → Protein
- Osmosis → Water molecule
- Simple diffusion → Oxygen
- Carrier proteins → Charged amino acid
- Active transport → Calcium moves from low concentration to high concentration
Explanation (300 Words):
Transport of molecules across cell membranes is essential for maintaining homeostasis and cellular function. The transport mechanisms vary depending on the type of molecule and the concentration gradient.
- Exocytosis → Protein
Exocytosis is a type of bulk transport where large molecules, such as proteins, are enclosed in vesicles and transported out of the cell. This process is vital for secreting hormones, neurotransmitters, and enzymes. - Osmosis → Water molecule
Osmosis is the passive movement of water molecules across a semipermeable membrane from an area of low solute concentration to an area of high solute concentration. This process helps maintain cell turgor pressure and hydration. - Simple diffusion → Oxygen
Simple diffusion is the passive movement of small, nonpolar molecules, such as oxygen and carbon dioxide, across the lipid bilayer without the need for energy or transport proteins. Oxygen diffuses from high to low concentration, such as from the lungs into the bloodstream. - Carrier proteins → Charged amino acid
Charged molecules, including amino acids, cannot pass through the lipid bilayer freely. Carrier proteins facilitate their transport by binding to the molecule and undergoing a conformational change to move it across the membrane. - Active transport → Calcium moves from low concentration to high concentration
Active transport requires ATP to move molecules against their concentration gradient. For example, calcium ions (Ca²⁺) are actively transported out of cells or into organelles to regulate cellular signaling and muscle contraction.
These transport mechanisms are crucial for cellular function, allowing cells to uptake nutrients, remove waste, and maintain internal balance.