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AP Biology Unit 8Q: Toxicology, Environmental Hazards & Health — practice questions — page 2

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 31–60 of 83.

The part of the fallopian tube where fertilisation typically takes place is the:Read the answer and worked solution →Leydig cells (interstitial cells) of the testis are responsible for:Read the answer and worked solution →The secretions constituting seminal plasma are rich in all of the following EXCEPT:Read the answer and worked solution →The finger-like projections at the edge of the infundibulum (fallopian tube), which help in collection of the ovum after ovulation, are called:Read the answer and worked solution →The primary female sex organs that produce ovum and steroid hormones are the:Read the answer and worked solution →The glandular tissue of each breast is divided into approximately how many mammary lobes containing alveoli?Read the answer and worked solution →The female external genitalia (vulva) include all of the following EXCEPT:Read the answer and worked solution →Each seminiferous tubule is lined on its inside by two types of cells:Read the answer and worked solution →Amoebiasis (amoebic dysentery) is caused by:Read the answer and worked solution →The first milk secreted by the mother for a few days after birth, rich in IgA antibodies, is called:Read the answer and worked solution →Widal test is used in the diagnosis of:Read the answer and worked solution →Typhoid fever in humans is caused by:Read the answer and worked solution →The most malignant form of malaria is caused by:Read the answer and worked solution →The infective stage of Plasmodium injected into humans by the female Anopheles mosquito is the:Read the answer and worked solution →Ringworms in humans are caused by:Read the answer and worked solution →Rheumatoid arthritis is best classified as:Read the answer and worked solution →The thymus gland:Read the answer and worked solution →MALT (mucosa-associated lymphoid tissue) constitutes approximately what percentage of the body's lymphoid tissue?Read the answer and worked solution →The standard widely used diagnostic test for AIDS is:Read the answer and worked solution →HIV/AIDS is NOT transmitted by:Read the answer and worked solution →Cannabinoids (marijuana, hashish, charas, ganja) are obtained from:Read the answer and worked solution →Which of the following diseases has been completely eradicated worldwide by vaccination?Read the answer and worked solution →The three types of muscle in human body are:Read the answer and worked solution →Functional unit of the kidney is the:Read the answer and worked solution →Main nitrogenous waste in humans is:Read the answer and worked solution →Renin is secreted by:Read the answer and worked solution →Antidiuretic effect of ADH means:Read the answer and worked solution →Renal artery, vein, and ureter enter/leave kidney at the:Read the answer and worked solution →Functional unit of skeletal muscle is the:Read the answer and worked solution →Thick filaments in skeletal muscle are made of:Read the answer and worked solution →

Worked practice questions

The part of the fallopian tube where fertilisation typically takes place is the:

  1. Infundibulum
  2. Isthmus
  3. Uterine cavity
  4. Ampulla
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Correct answer: D. Ampulla

Fertilisation occurs in the **ampullary region** (the wider part of the oviduct between infundibulum and isthmus), provided ovum and sperm reach there simultaneously.

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Leydig cells (interstitial cells) of the testis are responsible for:

  1. Providing nutrition to germ cells
  2. Producing oxytocin
  3. Producing sperms
  4. Synthesising and secreting androgens (testicular hormones)
Show answer and solution

Correct answer: D. Synthesising and secreting androgens (testicular hormones)

**Leydig cells** in the interstitial spaces synthesise and secrete **androgens** (testicular hormones) under LH stimulation. Sertoli cells nourish germ cells spermatogonia divide to form sperms.

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The secretions constituting seminal plasma are rich in all of the following EXCEPT:

  1. Certain enzymes
  2. Fructose
  3. Haemoglobin
  4. Calcium
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Correct answer: C. Haemoglobin

Seminal plasma — produced by seminal vesicles, prostate and bulbourethral glands — is rich in **fructose, calcium and enzymes**. Haemoglobin (a red-cell protein) is not a normal component of semen.

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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