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YR 12 BIO > MODULE 8. NON-INFECTIOUS DISEASE AND DISORDERS > Flashcards

MODULE 8. NON-INFECTIOUS DISEASE AND DISORDERS Flashcards

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Biology 101 flashcards
1
Q

define homeostasis

A

the process by which the body maintains a constant internals environment

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2
Q

why is homeostasis important

A

as many reactions inside the body only work under certain conditions, regardless of a changing outside environment

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3
Q

what is the stimulus and response model

A

the body’s way of detecting change in its external or internal environment and reacting accordingly

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4
Q

what is the two stages in homeostasis

A

detecting changes

counteracting changes

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5
Q

what is the control centre in the body

A

hypothamolus and spine

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6
Q

what is the control centre responsible for in the body

A

The control centre (brain (hypothamolus) and spine) is responsible for maintain fluctuations around the set point, receives information from the receptors about a change in a condition either too far above or below the set point

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7
Q

definition thermoregulation

A

the internal regulation of an animals body temperature

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8
Q

is endotherms warm or cold blooded?

A

warm

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9
Q

e.g. endotherms

A

humans

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10
Q

endotherms

A

Largely create our heat by adjusting processes in our bodies

o Rely mainly on physiological sources

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11
Q

is endotherms warm or cold blooded?

A

cold

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12
Q

what do endotherms reply on

A

Rely on external sources of temperature to heat up or cool down
o Depend solely on the environment

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13
Q

e.g. ectotherms

A

lizards

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14
Q

how does glucose provide energy

A
  1. food broken down
  2. release glucose that passes through the small intestine and into the blood stream
  3. glucose gets respired by cells where it is broken down into ATP
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15
Q

what happens if glucose moves outside of a healthy ranmge

A

it will trigger a homeostatic response to maintain a constant internal environment

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16
Q

when is a person likely to suffer from hypoglycaemia

A

after exercise

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17
Q

what is blood glucose levels monitored by

A

pancreas

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18
Q

what hormone is released when BGL is low

A

glucagon

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19
Q

what is glucagon

A

peptide hormone released by alpha cells that help increase BGL

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20
Q

what hormone is released when BGL is high

A

insulin

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21
Q

what is insulin

A

peptide hormone released by beta cells that help decrease BGL

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22
Q

what does the nervous system allow for

A

the nervous system allows organism to take information from the environment and respond by passing information around the body through a network of neural pathways

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23
Q

what does the central nervous system do

A

coordinates/gathers information from all over the body and coordinates

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24
Q

What does the peripheral nervous system

A

the neurons that connect the central nervous system to the rest of the body

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25
Q

what is the somatic portion of the peripheral nervous system

A

voluntary and conscious portion of the nervous system

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26
Q

what is the somatic portion of the nervous system made up of

A
  • Made up of nerves that connect to: skin, sensory organs, skeletal muscles
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27
Q

what is the function of somatic portion of the peripheral nervous system

A

o Processing sensory information that arrives via external stimuli (hearing, touch, sight)
o Controlling your skeletal muscles, aka the muscles which allow voluntary movement (e.g. walking, lifting an object)

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28
Q

what is the autonomic portion of the peripheral nervous system

A

Involuntary, unconscious portion of the nervous system

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29
Q

what is the autonomic portion of the peripheral nervous system made up of

A
  • Made up of nerves that connect : cardiac muscle in the heart, smooth muscle in the organs
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30
Q

function of the autonomic portion of the peripheral nervous system

A

o Controlling heart rate, digestion, salivation, sweating, pupil diameter etc.

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31
Q

what are neurons

A

functional units of the nervous system which carry signals throughout the body

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32
Q

list the structures within neurons

A 
BDAMS
cell body
dendrites
axons
myclein sheath
synpatic knobs
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33
Q

what are the different types of neurons

A

sensory neurons
motor neurons
interneruron

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34
Q

what does sensory neurons do

A

carry electrical impulses from receptors to the central nervous system

  • Long dendrites to receive sensory information from receptors
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35
Q

what does motor neurons do

A

Transmit electrical impulses from the CNS to effectors (muscles, organs and glands

  • Long axon to send sensory information to effector cells
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36
Q

what does inter neurons do

A

INTERNEURON = Transmit electrical impluses between sensory and motor neurons

  • Many dendrites to carry nerve impulses from sensory neurons to the cell body
  • Many, short axons to carry nerve impulses from the cell body to motor neurons
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37
Q

what is the endocrine system

A

a group of glands which secrete hormones

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38
Q

where is the hypothamulus located

A

in the brain

39
Q

what does the hypothamulus do

A
  • Controls many metabolic processes, including thermoregulation
  • Determines whether optimal conditions are being maintained
40
Q

what are 2 hormones released from the hypothamulus

A

TRH (thryotropin releasing hormone)
–> triggers the release of TSH
ADH (antidiuretic hormone)
–> increases water absorption into the blood from the kidneys

41
Q

where is the pituitary gland located

A

brain

42
Q

what does the pituitary gland do

A
  • Releases several hormones to regulate th secretion of hormones from other glands
43
Q

what are some hormones released by (anterior & posterior) pituitary glands

A

• Anterior pituitary gland – regulates the production of:

  • TSH (Thyroid stimulating hormone)
  • Growth hormone
  • FSH

• Posterior pituitary gland - regulates the production of:
- ADH (Antidiuretic hormone)

44
Q

whewre is the pineal gland located

A

brain

45
Q

what hormones are released by the pineal gland

A

• Mealtonin

  • Helps to control circadian rhythms (our 24hr biological cycles) and regulates some reproductive hormones
  • Regulated by light levels
46
Q

where is the thyroid gland located

A

around the neck, alongside the parathyroid gland

47
Q

what are hormones released by the thyroid

A
  • T4 (Thyroxine)

* T3 (Tri-iodothyronine)

48
Q

where is the pancreas

A
  • Found behind the stomach
49
Q

what does the pancreas do

A

controll BGL

50
Q

what are hormones released by the pancreas

A

insulin

glucagon

51
Q

what does the adrenal gland do

A

ADRENAL

- Help the body respond to stress and control your blood pressure

52
Q

what hormones are release d by the adrenal gland

A

Aldosterone
- Found in the adrenal cortex
Adrenaline
Noradrenaline

53
Q

what does the gonads do

A
  • Help the body respond to stress and control your blood pressure
54
Q

what are hormones released by the gonads

A 
Progestorne – Ovaries 
Estrogen – Ovaries 
-	Promote healthy development of female sex characteristics in puberty
-	Encourage fertility
Testosterone – testes 
-	Involved in masuline development
55
Q

what are xerophytes

A

plants that have adapted to survive in arid regions e.g. eucalyptus

56
Q

how does the closed stomata allow water balance to be maintained

A
  • Achieved by increasing the amount of water in the guard cells so that they swell up and close the gap
  • Plants will close their stomata when it is hottest (e.g. midday) and leave them open at all other times
  • Allows the leaf to maximise photosynthesis whilst minimising water loss
57
Q

causes of genetic diseases

A

altered or incorrect expression of a gene that causes disease is passed on

58
Q

e.g.s of genetic diseases

A

cystic fibrosis
colour blindness
down syndrome
haemophilia

59
Q

two types of diseases that are caused by environmental exposure

A

Hypersensitivity reactions:
The overreaction of the immune system in response to antigens in the environment E.G. Allergies
Genetic Disorders:
The risk of spontaneous mutations in genes is increased in response to mutagens (mutagens=can cause damage to DNA).

60
Q

what is malnutrition

A

a defiency, imbalance, or excess of carbs, fats, proteins, vitamins and minerals

61
Q

what occurs when an individual suffers from undernutrition

A
  • Stunting (low height)
  • Wasting ( low weight for height)
  • Underweight (low weight for age)
  • Micronutrient deficiencies
62
Q

what occurs when an individual suffers from overnutrition

A
  • Obesity

- Diet-related non-infectious diseases E.G. diabetes, stroke, cancer, CVD

63
Q

what is cancer

A

= A group of disease that involve unregulated and abnormal cell growth and division

64
Q

what is cancer caused by

A

o Cancer can be caused by random mutations OR environmental agents

65
Q

what is a carinogen

A

cancer-causing agent E.G. Tobacco smoke (causing lung cancer) & UV radiation (causing skin cancer)

66
Q

what is epidemiology

A

EPIDEMIOLOGY is the study of the distribution, patterns and causes of disease in a population.

67
Q

what is prevalence

A

PREVALENCE = the number of living people diagnosed with a disease at a given time.

68
Q

what is incidence

A

INCIDENCE = the number of new cases of a disease diagnosed within a specific time periods

69
Q

what is mortality

A

MORTALITY= the number of deaths occurring as a result of the disease during a specific time period.

70
Q

what is lungcancer

A

the leading cause of cancer related death in AUD

71
Q

incidence of lung cancer

A

12,700 cases/year

72
Q

morality of lung cancer

A

9000deaths/year

73
Q

risk factors of lung cancer:

A

smoking
radiotherapy
asbestos
air pollution

74
Q

what are conventional cancer treatments

A

chemo
radiotherapy
surgery

75
Q

what does chemo to treat cancer involve

A

Involves administering drugs which target and kill rapidly multiplying cells.
o Also destroys healthy cells are also destroyed by chemotherapy and this can have a terrible effect on a patient’s health and wellbeing

76
Q

what does radiotherapy to treat cancer involve

A

= involves using high doses of high energy radiation to kill cancer cells present in a tumour.
o The radiation achieves this by damaging the DNA inside of the cancer cells
o Radiotherapy doesn’t specifically target cancer cells hence it can also cause damage to healthy cells

77
Q

what does surgery to treat cancer involve

A

= to physically remove a tumour from the body
o Can be very difficult to ensure that all cancer cells have been eliminated
o There are risks to surgical procedures include infection and prolonged recovery time

78
Q

what is the potential future interest in treating cancer

A

immunotherapy

79
Q

why is immunotherapy being looked into for cancer treatment

A

*Although conventional cancer treatments are often able to successfully remove primary tumours, they have lots of side effects and people who have received them often suffer from relapse.

80
Q

what is immunotherapy

A

IMMUNOTHERAPY = A type of treatment that harnesses the immune system in order to fight diseases such as cancer.

81
Q

what are the two types of immunotherapy

A

passive

active

82
Q

what does passive immunotherapy involve

A

involves the administration of agents that are otherwise a natural component of the immune system in order to enhance a patient’s existing anti-cancer response.
Agents include antibodies or T lymphocytes
E.G. Monoclonal Antibodies (mAbs)

83
Q

what does active immunotherapy involve

A

Active immunotherapy = attempts to stimulate the patient’s own immune system to attack cancer cells.
E.G. of active immunotherapy include cancer vaccines and targeting specific antigen receptors using cytokines.
E.G. Preventative cancer vaccines  vaccines for human papillomavirus (causes cervical cancer) and hepatis B virus (causes liver cancer)

84
Q

what are the types of epidemiological studies

A
  1. Analytical studies, which aim to test a specific hypothesis
  2. Descriptive studies which aim to determine patterns in the way a disease is distributed
  3. Intervention studies, which aim to measure the effectiveness and safety of a health intervention
85
Q

what are the positives of epidemiological studies

A

They identify:

  • Cause(s) of disease
  • Emerging patterns and issues
  • Inequalities between different groups, which can be defined according to gender, age or economic status
86
Q

NEGATIVES of epidemiological studies

A

They fail to:

  • Provide a holistic view of health, as its primarily focuses on physical health
  • Explain sociocultural factors that contribute to negative health behaviours
  • Explain why health inequalities exist between different groups
87
Q

what are the benefits of epidemiology to the government

A

Based on epidemiological information, we can determine priority areas of concern. This information is then used to inform the management of disease and to improve methods of prevention and control
• Governments used epidemiological information to help construct public health campaigns

88
Q

how can epidemiology benefit individuals

A

Individuals can benefit from the public health campaigns that are implemented
Individuals are benefited as they may become more aware of their health or receive increased health updates that they wouldn’t have otherwise

89
Q

what does educational programs and campaigns do

A

EDUCATIONAL PROGRAMS AND CAMPAIGNS use strategies to provide information and educate the population about the effects of a disease and the risk factors that increase the chance of developing that disease.

90
Q

what does successful public health campaigns include

A

Successful public health campaigns have:

  • An evidence base for action
  • A package of a limited number of high priority evidence based interventions
  • Effective performance management with real-time monitoring, evaluation and program improvement partnerships between the public and private sectors
  • Communication of accurate information to healthcare workers and the public
  • Political commitment
91
Q

what is an e.g. of a public health campaign

A

quit smokign

92
Q

effectiveness of QUIT campaign

A

Smoking remains the leading preventable cause of death in the Australian population, with 15500 smoking-related deaths each year.
The QUIT campaign was introduced to reduce the prevalence of smoking-related diseases in the population.
 Lung cancer is a smoking-related disease
 Studies have shown a clear link between cigarette smoking and reduced life expectancy
• Studied comparing smokers and non-smokers show that smokers have a 10 times greater chance than non-smokers of dying from lung cancer,
• Studies show the more cigarettes a person smokes a day, the greater the incidence of lung cancer.
• Studies show the longer a person has smoked, the greater chance of developing lung cancer
• Studies showing the decrease in smoking prevalence due to the QUIT campaign and other government strategies.

93
Q

what ability does genetic engineering provide

A

The ability to manipulate genes has enabled us to devise a number of ways to prevent certain non-infectious diseases/disorders.

YR 12 BIO (10 decks)

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