Latest edition
Authors: Roger W. Soames, Abduelmenem Alashkham
,Chapter 1: Cells, Tissues, and Organs – Test Bank (Paramedical Practice)
1. Which level of structural organization represents the basic unit of life?
A. Tissue
B. Organ
C. Cell
D. System
Correct Answer: C
Explanation: The cell is the smallest structural and functional unit capable of carrying out
all life processes.
2. Which term refers to the maintenance of a stable internal environment?
A. Metabolism
B. Homeostasis
C. Organization
D. Differentiation
Correct Answer: B
Explanation: Homeostasis describes the body’s ability to regulate internal conditions
despite external changes.
3. Which cellular structure is primarily responsible for energy production?
A. Ribosome
B. Golgi apparatus
C. Mitochondrion
D. Nucleus
Correct Answer: C
Explanation: Mitochondria generate ATP through aerobic respiration.
4. The plasma membrane is best described as:
A. Fully permeable
B. Impermeable
,C. Selectively permeable
D. Rigid and non-flexible
Correct Answer: C
Explanation: The plasma membrane controls the movement of substances into and out of
the cell.
5. Which process involves the movement of water across a semi-permeable membrane?
A. Diffusion
B. Active transport
C. Osmosis
D. Endocytosis
Correct Answer: C
Explanation: Osmosis is the passive movement of water down its concentration gradient.
6. Which type of transport requires ATP?
A. Facilitated diffusion
B. Simple diffusion
C. Osmosis
D. Active transport
Correct Answer: D
Explanation: Active transport moves substances against their concentration gradient using
energy.
7. Which organelle modifies and packages proteins for secretion?
A. Ribosome
B. Golgi apparatus
C. Lysosome
D. Smooth endoplasmic reticulum
Correct Answer: B
Explanation: The Golgi apparatus processes and packages proteins for transport.
, 8. Lysosomes are important because they:
A. Produce energy
B. Store genetic material
C. Digest cellular waste
D. Synthesize lipids
Correct Answer: C
Explanation: Lysosomes contain enzymes that break down waste and damaged organelles.
9. Which tissue type is specialized for protection, absorption, and secretion?
A. Connective
B. Muscle
C. Nervous
D. Epithelial
Correct Answer: D
Explanation: Epithelial tissue lines surfaces and cavities and performs protective and
absorptive roles.
10. Which characteristic is typical of epithelial tissue?
A. Extensive blood supply
B. Cells tightly packed together
C. Presence of fibers
D. Ability to contract
Correct Answer: B
Explanation: Epithelial cells are closely packed with minimal extracellular material.
11. Which connective tissue is responsible for oxygen transport?
A. Bone
B. Cartilage
C. Blood