Human Biology - 4HB1 PearsonEdexcel

Pathogens And Disease Transmission

Gbogbo ọrọ náà

An outbreak of cholera in a city with poor sanitation, an athlete picking up a fungal infection in a shared changing room, and malaria spreading through a region with stagnant water all look like unrelated problems, but each follows directly from the biology of the organism responsible and the route it uses to reach a new host.

This lesson covers how infectious disease develops in a person, the structure and biology of viruses and bacteria, and the specific transmission, treatment and prevention of seven named diseases: Ebola, HIV, cholera, gonorrhoea, athlete's foot, malaria and typhoid, including the roles of the mosquito and housefly as disease vectors.

Ebumnobi

  1. Understand the general course of a disease as: infection, incubation and symptoms
  2. Know that diseases are caused by pathogenic microorganisms
  3. Describe the structure and reproduction of viruses
  4. Describe methods of transmission, treatment and prevention of the spread of Ebola and HIV (human immuno-deficiency virus), the virus that causes AIDS
  5. Describe the structure, nutrition and reproduction of bacteria including the interpretation of bacterial growth curves
  6. Investigate the effects of antibacterial agents and antibiotics on the growth of bacterial culture
  7. Know the methods of transmission, treatment and prevention of the spread of cholera and gonorrhoea
  8. Explain the importance of oral rehydration therapy
  9. Know the methods of transmission, treatment and prevention of the spread of athlete's foot
  10. Explain the role of the mosquito (malaria) and housefly (typhoid) in transmitting causative agents of disease
  11. Describe the treatment and prevention of the spread of malaria and typhoid

Maapụ uche

E seela isiokwu a ka ị hụ otu echiche si ejikọta.

Mepee maapụ uche na ngwa

Kaadị ncheta

Omume ncheta ngwa ngwa n'ihe a na-anwale n'isiokwu a.

Mee omume kaadị ndị a na ngwa

Akwụkwọ Ọmụmụ

An infectious disease follows a general course once a pathogen, a microorganism capable of causing disease, enters the body. First is infection: the pathogen establishes itself in the host and begins to multiply. This is followed by an incubation period, the interval during which the pathogen multiplies but the host shows no obvious symptoms, even though they may already be able to pass the infection on. Finally, symptoms appear once the pathogen population, or the toxins and tissue damage it causes, becomes large enough for the body to react visibly.

Ndetu Nkuzi Zuru Ezu di na Ngwa Green Bridge

Nweta ngwa Green Bridge CBT na ekwenti gi ma o bu kompiuta maka ulo akwukwo IGCSE zuru oke: akwukwo ule ndi gara aga, usoro nyocha, eserese uche, kaadi omumu na nkuzi olu.

Akwụkwọ ndụmọdụ zuru oke nwere eserese
Onye inyeaka mmụta AI
Ule nnwale nwere oge a na-ahazi ozugbo i mechara
Ọ dị na Android, Windows, macOS, na Linux Ngwa iOS na-abia n'oge na-adighi anya

Nnyocha Ọmụmụ

Ekele diri gi maka imecha ihe karịrị na Pathogens And Disease Transmission. Ugbu a na ị na-enyochakwa isi echiche na echiche ndị dị mkpa, ọ bụ oge iji nwalee ihe ị ma. Ngwa a na-enye ụdị ajụjụ ọmụmụ dị iche iche emebere iji kwado nghọta gị wee nyere gị aka ịmata otú ị ghọtara ihe ndị a kụziri.

Ị ga-ahụ ngwakọta nke ụdị ajụjụ dị iche iche, gụnyere ajụjụ chọrọ ịhọrọ otu n’ime ọtụtụ azịza, ajụjụ chọrọ mkpirisi azịza, na ajụjụ ede ede. A na-arụpụta ajụjụ ọ bụla nke ọma iji nwalee akụkụ dị iche iche nke ihe ọmụma gị na nkà nke ịtụgharị uche.

Jiri akụkụ a nke nyocha ka ohere iji kụziere ihe ị matara banyere isiokwu ahụ ma chọpụta ebe ọ bụla ị nwere ike ịchọ ọmụmụ ihe ọzọ. Ekwela ka nsogbu ọ bụla ị na-eche ihu mee ka ị daa mba; kama, lee ha anya dị ka ohere maka ịzụlite onwe gị na imeziwanye.

  1. Which stage of a disease occurs when a pathogen is multiplying in the body but no symptoms are yet visible? A) Infection B) Incubation period C) Symptomatic stage D) Recovery Answer: B
  2. Which organism acts as the vector for malaria? A) Housefly B) Anopheles mosquito C) Bacterium D) Fungus Answer: B
  3. What type of pathogen causes athlete's foot? A) Virus B) Bacterium C) Fungus D) Parasite Answer: C
  4. Which phase of bacterial growth shows a constant rate of cell division and a steep rise in numbers? A) Lag phase B) Exponential (log) phase C) Stationary phase D) Death phase Answer: B
  5. Oral rehydration therapy is used mainly to treat the effects of which disease? A) Malaria B) Athlete's foot C) Cholera D) HIV Answer: C

Rue ajuju ndi a n'ime ngwa ahu

Rue ajuju ndi a n'ime ngwa ahu

Meecha Ajụjụ Ule Ọmarịcha

Ị chọrọ ime ajụjụ ule ọmarịcha gbasara Pathogens And Disease Transmission? Budata ngwa Green Bridge CBT iji nweta ajụjụ ule ọmarịcha na nyocha zuru ezu gbasara isiokwu a.

Budata Ngwa Ahụ Na Google Playstore

Ihe nile ichoro iji nwee ihe ịga nke ọma na JAMB, WAEC & NECO.

Green Bridge CBT Mobile App
Onye Enyemaka Nkata AI Nke Ọmụmụ Ihe Ahaziri Maka Gị
Ajụjụ ule IGCSE, JAMB, WAEC na NECO karịrị 200,000
Ihe karịrị 1200 Nkọwa Nkuzi
Nkwado Na-enweghị Ịntanetị - Mụọ Ihe Mgbe Ọ Bụla, Ebe Ọ Bụla
Jadawalin Gada Kore
Akọkọ akọle iwe & Ibeere agbara
Sọfụma Ọrụ Gi & Ọganihu Gi
Nkọwa Miri Emi Maka Ọmụmụ Ihe Zuru Ezu