TEST QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) PLUS RATIONALES 2026
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1. Which level of organization is the simplest in the human
body?
A. Tissue
B. Organ
C. Cellular
D. Organ system
*Correct answer: C. Cells are the basic structural and functional
units of life.
2. Which tissue type lines body cavities and covers surfaces?
A. Connective
B. Muscle
C. Nervous
D. Epithelial
*Correct answer: D. Epithelial tissue forms protective linings
and coverings.
3. The primary function of the skeletal system is to:
A. Produce hormones
B. Protect organs and support the body
C. Conduct impulses
D. Exchange gases
,*Correct answer: B. Bones provide structure and protect vital
organs.
4. Which bone is classified as a long bone?
A. Sternum
B. Femur
C. Vertebra
D. Patella
*Correct answer: B. Long bones are longer than they are wide,
like the femur.
5. Which joint allows the greatest range of motion?
A. Hinge
B. Pivot
C. Saddle
D. Ball-and-socket
*Correct answer: D. Ball-and-socket joints allow movement in
all directions.
6. Which muscle tissue is involuntary and striated?
A. Skeletal
B. Smooth
C. Cardiac
D. Visceral
*Correct answer: C. Cardiac muscle contracts involuntarily and
has striations.
7. The basic functional unit of a muscle fiber is the:
A. Myofibril
B. Sarcomere
, C. Tendon
D. Fascicle
*Correct answer: B. Sarcomeres are the contractile units of
muscle.
8. Which ion is essential for muscle contraction?
A. Sodium
B. Potassium
C. Calcium
D. Chloride
*Correct answer: C. Calcium triggers the interaction of actin
and myosin.
9. The central nervous system consists of the:
A. Brain and nerves
B. Spinal cord and nerves
C. Brain and spinal cord
D. Ganglia and nerves
*Correct answer: C. The CNS includes the brain and spinal cord.
10. Which part of the neuron receives incoming signals?
A. Axon
B. Dendrite
C. Synapse
D. Myelin sheath
*Correct answer: B. Dendrites receive impulses from other
neurons.