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USMLE Step 3 Biology — practice by topic

Browse 29 questions across 3 Biology topics. Choose what you want to revise, then open a question to check its answer and worked solution.

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Biology topics

Biology (29)Endocrine System (29)Physiology (29)

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Compared with neural signalling, endocrine signalling is generally described as:Read the answer and worked solution →Compared with the nervous system, the endocrine system usually acts:Read the answer and worked solution →Glands that release hormones without ducts are described as:Read the answer and worked solution →Sweat and sebaceous glands release their secretions through ducts, making them:Read the answer and worked solution →

Worked practice questions

Compared with neural signalling, endocrine signalling is generally described as:

  1. Less specific
  2. Less similar
  3. Less sizeable
  4. Less standard
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Correct answer: A. Less specific

1. The same hormone may act on several tissues. 2. Its role depends on which target cells respond. 3. So endocrine signalling is less specific. _Source: OpenStax Anatomy and Physiology 2e, Chapter 17, The Endocrine System._

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Compared with the nervous system, the endocrine system usually acts:

  1. Steadier
  2. Slower
  3. Sooner
  4. Sharper
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Correct answer: B. Slower

1. Nerves handle quick responses to outside change. 2. Hormones look after the internal environment. 3. So the endocrine system acts slower. _Source: OpenStax Anatomy and Physiology 2e, Chapter 17, The Endocrine System._

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Glands that release hormones without ducts are described as:

  1. Ductless
  2. Doubtless
  3. Dateless
  4. Dustless
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Correct answer: A. Ductless

1. Exocrine glands secrete through ducts. 2. Endocrine glands release into the fluid around them. 3. So endocrine glands are ductless. _Source: OpenStax Anatomy and Physiology 2e, Chapter 17, The Endocrine System._

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