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AP Intermediate 1st Year Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis — practice questions

Explore 3 free Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis questions in AP Intermediate 1st Year Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis questions and exercises with answers

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The functional unit of the kidney is theRead the answer and worked solution →Each nephron has which two parts?Read the answer and worked solution →The glomerulus is a tuft of capillaries formed by theRead the answer and worked solution →

Worked practice questions

The functional unit of the kidney is the

  1. nephron
  2. neuron
  3. alveolus
  4. nephridium
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Correct answer: A. nephron

1. Each kidney contains nearly one million complex tubular structures. 2. Those structures are the nephrons, and they are the functional units of the kidney. 3. A neuron is the functional unit of the nervous system, not the kidney. 4. Confusing nephron with neuron is the commonest slip here. _Source: syllabus Biology Ch16 'Excretory Products and their Elimination', section 16.1_

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Each nephron has which two parts?

  1. Cortex and medulla
  2. Glomerulus and tubule
  3. Ureter and urethra
  4. Pelvis and calyx
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Correct answer: B. Glomerulus and tubule

1. The nephron is described as having two parts. 2. These are the glomerulus and the renal tubule. 3. Cortex and medulla are regions of the whole kidney, not parts of one nephron. 4. Ureter and urethra lie outside the kidney altogether. _Source: syllabus Biology Ch16 'Excretory Products and their Elimination', section 16.1_

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The glomerulus is a tuft of capillaries formed by the

  1. efferent arteriole
  2. renal vein
  3. afferent arteriole
  4. peritubular capillary
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Correct answer: C. afferent arteriole

1. Blood reaches the glomerulus through a fine branch of the renal artery. 2. That branch is the afferent arteriole, and it forms the tuft of capillaries. 3. Blood is then carried away by the efferent arteriole. 4. Reversing the two reverses the direction of blood flow through the filter. _Source: syllabus Biology Ch16 'Excretory Products and their Elimination', section 16.1_

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