Start learning →

AP Biology Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis — practice questions — page 2

Explore 55 free Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

Practise Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis with Quill →

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

Showing questions 31–55 of 55.

ADH (anti-diuretic hormone, vasopressin) acts to:Read the answer and worked solution →CO2 in the human body is primarily excreted by the:Read the answer and worked solution →The condition of having high urea levels in the blood (a sign of kidney failure) is called:Read the answer and worked solution →RIGOR MORTIS (stiffness after death) occurs because:Read the answer and worked solution →An adult human skeleton has approximately how many bones?Read the answer and worked solution →The pectoral girdle in humans consists of:Read the answer and worked solution →The KNEE joint is an example of which type of synovial joint?Read the answer and worked solution →SLOW-TWITCH (Type I, red) muscle fibres are characterised by:Read the answer and worked solution →NEET · Biology · Nephron Parts ↔ RoleRead the answer and worked solution →NEET · Biology · Joint Type ↔ ExampleRead the answer and worked solution →NEET · Biology · Sarcomere Band ↔ ContentsRead the answer and worked solution →Work out the kidney numbersRead the answer and worked solution →Match the kidney structureRead the answer and worked solution →Into the kidney or out of it?Read the answer and worked solution →Follow the filtrateRead the answer and worked solution →Judge the filtration claimsRead the answer and worked solution →The band of a muscle fibril that contains only actin is theRead the answer and worked solution →The dark band of a muscle fibril, containing myosin, is called theRead the answer and worked solution →The functional unit of a muscle fibril, lying between two successive Z-lines, is theRead the answer and worked solution →The thin filament of a muscle fibril is made of two filamentous strands ofRead the answer and worked solution →In a resting muscle, the active binding sites on actin are masked byRead the answer and worked solution →The thick filament of a muscle fibril is a polymer ofRead the answer and worked solution →The two parts of a meromyosin are calledRead the answer and worked solution →Which protein runs alongside the actin filaments throughout their length?Read the answer and worked solution →Follow the filtrate down to urineRead the answer and worked solution →

Worked practice questions

ADH (anti-diuretic hormone, vasopressin) acts to:

  1. Decrease water reabsorption (more urine output)
  2. Decrease Na+ reabsorption (more urine output)
  3. Increase water reabsorption (less, concentrated urine)
  4. Increase urea production rate by liver tissue
Show answer and solution

Correct answer: C. Increase water reabsorption (less, concentrated urine)

ADH (vasopressin), from posterior pituitary, INCREASES WATER REABSORPTION in collecting ducts (inserts aquaporins). **Result:** less urine, more concentrated urine. Released when body is dehydrated.

Open this question →

CO2 in the human body is primarily excreted by the:

  1. Kidneys (in urine)
  2. Lungs (via exhalation)
  3. Skin (via sweat)
  4. Large intestine (via faeces)
Show answer and solution

Correct answer: B. Lungs (via exhalation)

LUNGS excrete CO2 (and water vapour) via exhalation. Kidneys excrete urea, water, salts, drugs. Skin excretes water, salts, urea via sweat. Large intestine excretes solid waste (mainly undigested food).

Open this question →

The condition of having high urea levels in the blood (a sign of kidney failure) is called:

  1. Glycosuria (sugar in urine)
  2. Hematuria (blood in urine)
  3. Calculi (kidney stones)
  4. Uremia (urea retention)
Show answer and solution

Correct answer: D. Uremia (urea retention)

UREMIA = abnormal accumulation of urea (and other nitrogenous wastes) in the blood, caused by kidney failure. **Symptoms:** nausea, fatigue, confusion. **Treatment:** haemodialysis or transplant.

Open this question →

How to practise

  1. Choose a Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis question and try to work out your answer.
  2. Open the question to check the correct answer and read its worked solution.
  3. Continue in the app for bite-sized lessons, explanations and review with Quill. You can start without creating an account.

Put it into practice

Continue with Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis practice for AP Biology. Read explanations as you go. No signup form needed to start.

Practise Unit 8F: Human Physiology: Digestion, Excretion & Homeostasis →

More Biology topics

Unit 5C: Non-Mendelian Genetics & Population TransmissionUnit 2B: Membrane Transport, Tonicity & Cell SizeUnit 8K: Human Organ Systems & HomeostasisUnit 3B: Photosynthesis, Respiration & Cellular EnergyUnit 7B: Population Genetics & Hardy-Weinberg EvolutionUnit 2G: Osmoregulation & Membrane DynamicsUnit 8R: Environmental Pollution & Organismal HealthUnit 5D: Organismal Reproduction & Life Cycles