Bios 251 - Week 3 & 4 / Exam 2
Review QUESTIONS AND
VERIFIED CORRECT
ANSWERS GRADED A+
[LATEST 2026-2027] 100%
GUARANTEED PASS
What is phagocytosis & pinocytosis? - CORRECT ANSWER-phagocytosis brings in solids (cell
eating) and pinocytosis brings in liquids (cell drinking).
What is exocytosis? - CORRECT ANSWER-The transportation of materials out of the cell.
What is intracellular and extracellular fluid? - CORRECT ANSWER-Intra - Known as cytosol, more
gel like than ECF
Extra - Sometimes called "tissue fluid", includes plasma.
What is voltage? - CORRECT ANSWER-Any difference in electrical charge (+) or (-).
The uneven distribution of ions across the membrane is controlled by protein pumps and leak
channels. Resulting in more (+) ions outside, and more (-) ions inside the cell.
What is the resting membrane potential value? - CORRECT ANSWER-RMP = -70mV
, sodium-potassium pump - CORRECT ANSWER-Moves 3 sodium ions out & 2 potassium ions into
the cell.
Creates a (-) charge in the cell.
Muscle and nervous system rely on it.
Explain Depolarization and Repolarization - CORRECT ANSWER-Depolar - Na+ channels open
and Na+ enters cell making it more positive.
Repolar - Na+ channels close, K+ channels open, K+ rushes out of the cell
What are organelles? - CORRECT ANSWER-Tiny organized structures that perform functions
within our cells.
What are the membranous organelles? - CORRECT ANSWER-They are covered with lipid
membrane.
Nucleus, Mitochondria, Lysosomes, Peroxisomes, Smooth and Rough ER, and Golgi complex.
Describe the function of the nucleus - CORRECT ANSWER-Genetic control center. Directs protein
synthesis. Stores DNA. Site of DNA replication and transcription.
Describe the function of the rough and smooth ER - CORRECT ANSWER-ROUGH ER - Site of
protein AND lipid synthesis.
SMOOTH ER - Site of lipid synthesis
Describe the function of ribosomes - CORRECT ANSWER-synthesize proteins
Review QUESTIONS AND
VERIFIED CORRECT
ANSWERS GRADED A+
[LATEST 2026-2027] 100%
GUARANTEED PASS
What is phagocytosis & pinocytosis? - CORRECT ANSWER-phagocytosis brings in solids (cell
eating) and pinocytosis brings in liquids (cell drinking).
What is exocytosis? - CORRECT ANSWER-The transportation of materials out of the cell.
What is intracellular and extracellular fluid? - CORRECT ANSWER-Intra - Known as cytosol, more
gel like than ECF
Extra - Sometimes called "tissue fluid", includes plasma.
What is voltage? - CORRECT ANSWER-Any difference in electrical charge (+) or (-).
The uneven distribution of ions across the membrane is controlled by protein pumps and leak
channels. Resulting in more (+) ions outside, and more (-) ions inside the cell.
What is the resting membrane potential value? - CORRECT ANSWER-RMP = -70mV
, sodium-potassium pump - CORRECT ANSWER-Moves 3 sodium ions out & 2 potassium ions into
the cell.
Creates a (-) charge in the cell.
Muscle and nervous system rely on it.
Explain Depolarization and Repolarization - CORRECT ANSWER-Depolar - Na+ channels open
and Na+ enters cell making it more positive.
Repolar - Na+ channels close, K+ channels open, K+ rushes out of the cell
What are organelles? - CORRECT ANSWER-Tiny organized structures that perform functions
within our cells.
What are the membranous organelles? - CORRECT ANSWER-They are covered with lipid
membrane.
Nucleus, Mitochondria, Lysosomes, Peroxisomes, Smooth and Rough ER, and Golgi complex.
Describe the function of the nucleus - CORRECT ANSWER-Genetic control center. Directs protein
synthesis. Stores DNA. Site of DNA replication and transcription.
Describe the function of the rough and smooth ER - CORRECT ANSWER-ROUGH ER - Site of
protein AND lipid synthesis.
SMOOTH ER - Site of lipid synthesis
Describe the function of ribosomes - CORRECT ANSWER-synthesize proteins
