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HESI A2 Practice Test Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
Which of the following is NOT a type of muscle tissue?
- Cardiac
- Smooth
- Skeletal
- Connective
✔✔D) Connective
What is the main function of the large intestine?
- Absorb nutrients
- Absorb water and form feces
- Produce enzymes
- Filter toxins
✔✔B) Absorb water and form feces
Which hormone regulates blood sugar levels? 1 / 4
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- Insulin
- Adrenaline
- Thyroxine
- Cortisol
✔✔A) Insulin
What is the name of the protein that carries oxygen in red blood cells?
- Albumin
- Hemoglobin
- Collagen
- Keratin
✔✔B) Hemoglobin
Which organ is primarily responsible for filtering blood and producing urine?
- Liver
- Kidney
- Lung
- Heart 2 / 4
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✔✔B) Kidney
What is the name of the thin, outermost layer of the skin?
- Dermis
- Epidermis
- Hypodermis
- Subcutaneous
✔✔B) Epidermis
Which type of blood vessel carries blood away from the heart?
- Veins
- Arteries
- Capillaries
- Venules
✔✔B) Arteries
What is the chemical symbol for water?
A) CO2 3 / 4
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B) H2O
- O2
- NaCl
✔✔B) H2O
Which organelle is known as the "powerhouse of the cell"?
- Nucleus
- Ribosome
- Mitochondria
- Golgi apparatus
✔✔C) Mitochondria
What gas do humans inhale to survive?
- Carbon dioxide
- Nitrogen
- Oxygen
- Helium
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✔✔C) Oxygen