Biology of Human and Plant Emissions
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Questions and Answers

What is the estimated number of skin cells shed by humans per hour?

  • 1 billion
  • 500 million
  • 100 million
  • 200 million (correct)

    • How many times do humans breathe on average per day?

  • 15,000 times
  • 10,000 times
  • 20,000 times (correct)
  • 25,000 times

    • What is a unique property of smell compared to sound and light?

  • It can travel through a vacuum
  • It can be measured on a scale
  • It cannot be measured on a scale (correct)
  • It can only be detected by humans

    • Why can some odour sources last a long time?

    <p>Because of their physical properties</p> Signup and view all the answers

    What is a benefit of smell and sound communication?

    <p>It limits the risks of aggression</p> Signup and view all the answers

    What is necessary for humans to detect chemicals through smell and taste?

    <p>The chemicals must be dissolved in a liquid</p> Signup and view all the answers

    What is the primary route by which chemicals enter the body to stimulate olfactory nerves?

    <p>Through the nose</p> Signup and view all the answers

    What is a common function of smell and communication between plants and animals?

    <p>Attracting pollinators</p> Signup and view all the answers

    What is the average amount of faeces produced by humans per day?

    <p>120g</p> Signup and view all the answers

    How many hairs do humans lose on average per day?

    <p>50-100 hairs</p> Signup and view all the answers

    What is the function of the vomeronasal organ in mammals?

    <p>To distinguish sexual signs</p> Signup and view all the answers

    What is unique about the sense of smell in dolphins?

    <p>They do not have an olfactory nerve</p> Signup and view all the answers

    Why do many toxins have a bitter taste?

    <p>To avoid ingesting toxins that might harm/kill us</p> Signup and view all the answers

    What is the function of the turbinal bones in the olfactory recess of dogs?

    <p>To increase the surface area for olfaction</p> Signup and view all the answers

    What is the term for chemicals that facilitate communication between animals of the same species?

    <p>Pheromones</p> Signup and view all the answers

    What is unique about the sense of taste in catfish?

    <p>They have taste receptors all over their body</p> Signup and view all the answers

    What is the term for chemicals that facilitate communication between animals of different species to the advantage of the sender but not the receiver?

    <p>Allomones</p> Signup and view all the answers

    What is the purpose of the slit running along the side of the nose in some animals?

    <p>To minimize disturbance to the molecules being smelled</p> Signup and view all the answers

    What is the term for the chemical composition of a scent mark changing over time?

    <p>Diffusion</p> Signup and view all the answers

    How do female mosquitoes confirm the presence of a human before inserting their proboscis?

    <p>By detecting lactic acid on skin</p> Signup and view all the answers

    What is the primary function of a scent plume in chemical odor detection?

    <p>To spread out with distance from the original source</p> Signup and view all the answers

    What is the primary source of DMS, which contributes to the distinctive smell of seawater?

    <p>Phytoplankton</p> Signup and view all the answers

    What is the unique ability of elephants regarding food containers?

    <p>Identifying the quantity of food</p> Signup and view all the answers

    What is the purpose of social ants rubbing their antennas together?

    <p>To confirm species identity</p> Signup and view all the answers

    What is the primary function of intraspecific communication in animals?

    <p>To convey information about species, social group, and individual identity</p> Signup and view all the answers

    Which birds are known to detect carrion by smell?

    <p>Turkey vultures</p> Signup and view all the answers

    What is the unique ability of migrating salmon?

    <p>To identify their natal river by smell</p> Signup and view all the answers

    What is the primary application of detection dogs in animal smell?

    <p>Detection of drugs, money, and human trafficking</p> Signup and view all the answers

    Which animals are capable of detecting disease in prey?

    <p>Wolves</p> Signup and view all the answers

    What is the unique feature of puff adders regarding smell?

    <p>They are almost undetectable by smell</p> Signup and view all the answers

    What is the primary reason why some odour sources can be used to provide information about the subject without the subject being present?

    <p>The rate of diffusion of the odour molecules</p> Signup and view all the answers

    What is the similarity between smell and taste in terms of detection?

    <p>Both require chemicals to be dissolved in a liquid</p> Signup and view all the answers

    What is the primary function of the molecules released by humans and other organisms?

    <p>To unintentionally provide information about the subject</p> Signup and view all the answers

    What is the advantage of smell communication over sound and light communication?

    <p>It allows for the detection of a wide range of molecules</p> Signup and view all the answers

    What is the role of plants in terms of smell and communication?

    <p>They release a wide range of odours for various purposes</p> Signup and view all the answers

    What is the primary route by which chemicals enter the body to stimulate olfactory nerves?

    <p>Through the nose</p> Signup and view all the answers

    What is the primary function of the turbinal bones in the olfactory recess of dogs?

    <p>To increase the surface area for olfactory receptors</p> Signup and view all the answers

    Which of the following animals uses its feet to taste its food?

    <p>Catfish</p> Signup and view all the answers

    What is the estimated daily production of urine by humans?

    <p>0.8-2.0 litres</p> Signup and view all the answers

    What is the primary function of the vomeronasal organ in mammals?

    <p>To distinguish sexual signs</p> Signup and view all the answers

    What is the purpose of the molecules released by humans and other organisms in terms of communication?

    <p>To unintentionally provide information about the subject</p> Signup and view all the answers

    What is the primary difference between smell and taste in terms of detection?

    <p>Smell detects molecules in the air, while taste detects molecules in a liquid</p> Signup and view all the answers

    What is the term for chemicals that change over time in a scent mark?

    <p>Volatile compounds</p> Signup and view all the answers

    Why do many toxins have a bitter taste?

    <p>To avoid ingesting toxins that might harm us</p> Signup and view all the answers

    What is the benefit of the sense of smell in terms of detecting information?

    <p>It allows for the detection of information without the risk of aggression</p> Signup and view all the answers

    Which of the following animals is capable of detecting disease in prey?

    <p>Not mentioned in the text</p> Signup and view all the answers

    What is the primary function of the olfactory epithelium in dogs?

    <p>To increase the surface area for olfactory receptors</p> Signup and view all the answers

    What is the term for chemicals that facilitate communication between animals of the same species?

    <p>Pheromones</p> Signup and view all the answers

    Which of the following birds is capable of detecting carrion by smell?

    <p>Not mentioned in the text</p> Signup and view all the answers

    What is the primary function of the slit running along the side of the nose in some animals?

    <p>To minimize disturbance to molecules in front of the nostrils</p> Signup and view all the answers

    What is a possible reason why an animal may move in a zig-zag fashion when detecting a scent plume?

    <p>To rapidly identify the source of the chemical odor</p> Signup and view all the answers

    What is the primary function of scent marks in locations where conspecifics will find them?

    <p>To facilitate intraspecific communication</p> Signup and view all the answers

    What is the role of DMS in the smell of seawater?

    <p>It is released by phytoplankton when eaten by krill</p> Signup and view all the answers

    What is unique about the ability of elephants to identify the quantity of food in a container?

    <p>They can identify the quantity of food through smell</p> Signup and view all the answers

    What is the purpose of social ants rubbing their antennas together?

    <p>To confirm species and colony identification</p> Signup and view all the answers

    What is the unique ability of homing pigeons?

    <p>They can identify 'landmarks' by smell</p> Signup and view all the answers

    What is the primary function of intraspecific communication in animals?

    <p>To communicate species, social group, sex, reproductive status, social status, and individual identity</p> Signup and view all the answers

    What is the benefit of using detection dogs in conservation?

    <p>They can detect human trafficking</p> Signup and view all the answers

    What is a possible reason why migrating salmon can identify their natal river by taste and smell?

    <p>They can detect the unique chemical composition of their natal river</p> Signup and view all the answers

    What is the primary function of the scent plume in chemical odor detection?

    <p>To make the source of the odor harder to locate</p> Signup and view all the answers

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