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HESI AP V1/V2 Study Guide Questions and Answers | Latest Version | 2025/2026 | Correct & Verified
Which nerve controls the diaphragm during breathing?✔✔Phrenic nerve
What is the connective tissue that cushions joints?✔✔Cartilage
Which structure in the brain connects the two hemispheres?✔✔Corpus callosum
What is the name of the pigment that gives skin its color?✔✔Melanin
Which blood vessels carry blood toward the heart?✔✔Veins
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Which organ is part of both the respiratory and digestive systems?✔✔Pharynx
What is the term for red blood cell production?✔✔Erythropoiesis
Which hormone stimulates the production of milk after childbirth?✔✔Prolactin
What is the smallest functional unit of muscle?✔✔Sarcomere
Which body system is responsible for producing hormones?✔✔Endocrine system
Which part of the skeletal system protects the spinal cord?✔✔Vertebral column
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What is the space between two neurons called?✔✔Synaptic cleft
Which enzyme in saliva begins the digestion of carbohydrates?✔✔Amylase
What is the name of the connective tissue membrane that surrounds bones?✔✔Periosteum
What is the basic functional unit of the nervous system?✔✔Neuron
What is the largest organ in the human body?✔✔Skin
Which structure carries oxygenated blood from the lungs to the heart?✔✔Pulmonary vein
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What is the primary function of the alveoli in the lungs?✔✔Gas exchange
Which part of the brain controls voluntary muscle movements?✔✔Cerebrum
What is the protein in red blood cells that carries oxygen?✔✔Hemoglobin
Which gland produces the hormone melatonin?✔✔Pineal gland
What is the structural and functional unit of the kidney?✔✔Nephron
Which muscle separates the thoracic cavity from the abdominal cavity?✔✔Diaphragm
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