Anatomy HESI A2 Practice Test

Anatomy HESI A2 Practice Test Related

Review Anatomy HESI A2 Practice Test related questions and content

Which part of the brain is involved in processing visual information?

  • A. Temporal lobe
  • B. Occipital lobe
  • C. Parietal lobe
  • D. Frontal lobe
Correct Answer: B

Rationale: The correct answer is B: Occipital lobe. The occipital lobe, situated at the back of the brain, is specifically responsible for processing visual information received from the eyes. It plays a crucial role in interpreting and making sense of visual stimuli, allowing individuals to perceive and comprehend the world around them. The Temporal lobe (Choice A) is involved in processing auditory information and memory, not visual processing. The Parietal lobe (Choice C) is responsible for processing sensory information from various parts of the body, but not specifically visual information. The Frontal lobe (Choice D) is involved in functions such as decision-making, problem-solving, and voluntary movement, but not processing visual stimuli.

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Which of the following statements best describes endocrine glands?

  • A. They secrete chemicals into the blood
  • B. They secrete enzymes into ducts
  • C. They produce sweat
  • D. They produce saliva
Correct Answer: A

Rationale: Endocrine glands are ductless glands that release hormones directly into the bloodstream. These hormones are then carried to target organs and tissues throughout the body, where they regulate various physiological functions. The statement 'They secrete chemicals into the blood' accurately describes the function of endocrine glands. Choices B, C, and D are incorrect because endocrine glands do not secrete enzymes into ducts, produce sweat, or produce saliva. These functions are typically associated with exocrine glands, sweat glands, and salivary glands, respectively.

What is the function of hemoglobin in red blood cells?

  • A. To fight infections
  • B. To transport oxygen
  • C. To carry carbon dioxide
  • D. To store oxygen
Correct Answer: B

Rationale: The correct answer is B: 'To transport oxygen.' Hemoglobin in red blood cells plays a crucial role in transporting oxygen. It binds to oxygen in the lungs and carries it to the body's tissues and organs for cellular respiration. Choices A, C, and D are incorrect because hemoglobin's primary function is to bind and transport oxygen, not to fight infections, carry carbon dioxide, or store oxygen.

What is the role of platelets in the blood?

  • A. To transport oxygen
  • B. To fight infections
  • C. To clot blood
  • D. To carry nutrients
Correct Answer: C

Rationale: Platelets, also known as thrombocytes, play a crucial role in blood clotting. When there is an injury, platelets adhere to the site and release substances that form a clot, preventing excessive bleeding. This function is vital for maintaining hemostasis and preventing blood loss. Choice A is incorrect because red blood cells, not platelets, are responsible for transporting oxygen. Choice B is incorrect as white blood cells are primarily responsible for fighting infections. Choice D is incorrect as nutrients are mainly transported by plasma and red blood cells, not platelets.

What is the primary function of hemoglobin in red blood cells?

  • A. To transport nutrients
  • B. To fight infections
  • C. To carry oxygen
  • D. To produce energy
Correct Answer: C

Rationale: The correct answer is C: 'To carry oxygen.' Hemoglobin in red blood cells binds to oxygen in the lungs and transports it to the tissues and organs throughout the body. This oxygen transport is crucial for cellular respiration and the overall functioning of the body. Choices A, B, and D are incorrect because hemoglobin's primary function is not to transport nutrients, fight infections, or produce energy in red blood cells.

What is the function of the urinary bladder?

  • A. To filter waste from the blood
  • B. To store urine
  • C. To regulate fluid balance
  • D. To remove waste from the body
Correct Answer: B

Rationale: The correct answer is B: To store urine. The urinary bladder's primary function is to store urine produced by the kidneys until it is ready to be excreted from the body. It acts as a reservoir that temporarily holds urine until an appropriate time for elimination. Choices A, C, and D are incorrect because the urinary bladder does not filter waste from the blood, regulate fluid balance, or directly remove waste from the body. These functions are primarily carried out by the kidneys and other organs in the excretory system.

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