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AP Biology Unit 8Q: Toxicology, Environmental Hazards & Health — practice questions

Explore 83 free Unit 8Q: Toxicology, Environmental Hazards & Health questions in AP Biology Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Unit 8Q: Toxicology, Environmental Hazards & Health questions and exercises with answers

Showing questions 1–30 of 83.

**Innate immunity** is best described as:Read the answer and worked solution →**Malaria** is caused by which protozoan?Read the answer and worked solution →The **Widal test** is used for diagnosis of:Read the answer and worked solution →**Cannabinoids** (active component: THC) are obtained from:Read the answer and worked solution →Which property of muscle allows it to return to its original length after being stretched or contracted?Read the answer and worked solution →A tissue sample shows branching muscle fibres, striations, and involuntary action. It is most likelyRead the answer and worked solution →Which type of muscle assists in the movement of food through the digestive tract and movement of gametes?Read the answer and worked solution →Which combination correctly matches muscle type with its action and location?Read the answer and worked solution →Which feature is common to both skeletal muscle and cardiac muscle?Read the answer and worked solution →Which of the following is NOT a basic property of muscles mentioned here?Read the answer and worked solution →Muscles are specialized tissues of which embryonic origin?Read the answer and worked solution →Movement of limbs, jaw and tongue in humans primarily depends on the contractile property ofRead the answer and worked solution →Amoeboid movement is shown by which of the following cells?Read the answer and worked solution →The osmolarity of the medullary interstitium ranges approximately fromRead the answer and worked solution →Aldosterone secreted by the adrenal cortex acts on the DCT toRead the answer and worked solution →Protonephridia (flame cells) are the excretory structures ofRead the answer and worked solution →ADH (vasopressin) acts mainly on theRead the answer and worked solution →The Bowman's capsule visceral layer is composed of specialised cells calledRead the answer and worked solution →Atrial Natriuretic Factor (ANF) is released by theRead the answer and worked solution →In humans, the ascending limb of Henle is impermeable to water mainly becauseRead the answer and worked solution →The vasa recta arises fromRead the answer and worked solution →Uraemia refers toRead the answer and worked solution →Renal calculi are typically formed byRead the answer and worked solution →In males, LH acts on which cells to stimulate androgen secretion?Read the answer and worked solution →The transformation of spermatids into spermatozoa is called:Read the answer and worked solution →The enlarged end of the penis covered by a loose fold of skin (foreskin) is called the:Read the answer and worked solution →In males, FSH acts on which cells?Read the answer and worked solution →After spermiogenesis, the release of mature sperm from the seminiferous tubules is called:Read the answer and worked solution →Each testis is divided into approximately how many compartments called testicular lobules?Read the answer and worked solution →During each coitus, a human male typically ejaculates approximately:Read the answer and worked solution →

Worked practice questions

**Innate immunity** is best described as:

  1. Acquired after exposure to a pathogen
  2. Non-specific, present from birth, including physical/chemical/cellular barriers
  3. Only against viruses
  4. Inherited only from mother
Show answer and solution

Correct answer: B. Non-specific, present from birth, including physical/chemical/cellular barriers

**Innate (natural) immunity:** present from birth, non-specific. Includes physical barriers (skin, mucous), chemical (gastric acid, lysozyme), cellular (phagocytes, NK cells), and cytokines. First line of defence.

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**Malaria** is caused by which protozoan?

  1. *Entamoeba*
  2. *Plasmodium* (spread by female *Anopheles* mosquito)
  3. *Trypanosoma*
  4. *Leishmania*
Show answer and solution

Correct answer: B. *Plasmodium* (spread by female *Anopheles* mosquito)

**Malaria:** *Plasmodium* spp. (P. vivax, P. falciparum, P. malariae, P. ovale, P. knowlesi). **Vector:** female *Anopheles* mosquito. **Life cycle:** liver schizogony, then RBC schizogony causing periodic fevers. P. falciparum is the deadliest.

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The **Widal test** is used for diagnosis of:

  1. Malaria
  2. Typhoid (caused by *Salmonella typhi*)
  3. Tuberculosis
  4. AIDS
Show answer and solution

Correct answer: B. Typhoid (caused by *Salmonella typhi*)

**Widal test:** detects agglutinating antibodies (anti-O, anti-H) against *Salmonella typhi*/*paratyphi* antigens in patient serum. Useful 7-10 days after symptom onset. **Modern alternative:** blood culture, IgM ELISA.

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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