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HESI A2 Entrance Exam Biology Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
What is the primary role of the lymphatic system?
- Transport oxygen
- Return excess tissue fluid to blood and fight infections
- Produce hormones
- Digest fats
✔✔B) Return excess tissue fluid to blood and fight infections
Which blood component is essential for clotting?
- Red blood cells
- Platelets
- Plasma
- White blood cells
✔✔B) Platelets
What is the main function of the nervous system? 1 / 4
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- Fight infection
- Control body functions via electrical signals
- Produce hormones
- Digest food
✔✔B) Control body functions via electrical signals
What is the primary function of the digestive system?
- Pump blood
- Break down food and absorb nutrients
- Remove waste from blood
- Fight infections
✔✔B) Break down food and absorb nutrients
Which hormone increases blood sugar levels?
- Insulin
- Glucagon
- Thyroxine
- Estrogen 2 / 4
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✔✔B) Glucagon
What type of connective tissue connects bones to bones?
- Tendons
- Ligaments
- Cartilage
- Fascia
✔✔B) Ligaments
Where are stem cells that produce blood cells found?
- Brain
- Bone marrow
- Liver
- Kidney
✔✔B) Bone marrow
What is the main function of the respiratory system?
- Circulate blood 3 / 4
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- Exchange gases between body and environment
- Digest food
- Regulate hormones
✔✔B) Exchange gases between body and environment
What is the function of the pancreas?
- Filter blood
- Produce digestive enzymes and hormones
- Pump blood
- Store bile
✔✔B) Produce digestive enzymes and hormones
What is the powerhouse of the cell?
- Nucleus
- Ribosome
- Mitochondria
- Golgi apparatus
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✔✔C) Mitochondria