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Questions and Answers
According to Arvind Gupta, what components can DNA, proteins, and cells be compared to respectively?
According to Arvind Gupta, what components can DNA, proteins, and cells be compared to respectively?
Based on the provided text, what is biology primarily described as?
Based on the provided text, what is biology primarily described as?
According to Ray Kurzweil, what is one characteristic of the software running in our bodies?
According to Ray Kurzweil, what is one characteristic of the software running in our bodies?
What is implied about biology's potential impact on significant global issues?
What is implied about biology's potential impact on significant global issues?
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In what context does the text present the assertion that “‘Impossible’ is not a scientific term”?
In what context does the text present the assertion that “‘Impossible’ is not a scientific term”?
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What is the primary function of calcitonin?
What is the primary function of calcitonin?
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Medullary thyroid cancer (MTC) may increase a person's risk of:
Medullary thyroid cancer (MTC) may increase a person's risk of:
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Which hormone opposes the action of calcitonin?
Which hormone opposes the action of calcitonin?
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Which of the following is NOT a function of triiodothyronine?
Which of the following is NOT a function of triiodothyronine?
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What condition is caused by iodine deficiency?
What condition is caused by iodine deficiency?
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Which plant hormone is responsible for stimulating both cell elongation and cell division, particularly in dwarf varieties?
Which plant hormone is responsible for stimulating both cell elongation and cell division, particularly in dwarf varieties?
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Which of the following occurs when tear glands are activated?
Which of the following occurs when tear glands are activated?
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What is a symptom of exophthalmic goitre, a condition related to hyperthyroidism?
What is a symptom of exophthalmic goitre, a condition related to hyperthyroidism?
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Unlike auxins, which hormone stimulates lateral buds to grow into branches?
Unlike auxins, which hormone stimulates lateral buds to grow into branches?
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Which of the following plant hormones generally opposes the effects of both auxins and gibberellins?
Which of the following plant hormones generally opposes the effects of both auxins and gibberellins?
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Thyroxine regulates growth and development by:
Thyroxine regulates growth and development by:
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What is the primary function of dendrites in a neuron?
What is the primary function of dendrites in a neuron?
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Which hormone stimulates the ripening of fruits?
Which hormone stimulates the ripening of fruits?
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Which of the following describes the state of the urinary bladder under sympathetic nervous system control?
Which of the following describes the state of the urinary bladder under sympathetic nervous system control?
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What is osteopenia?
What is osteopenia?
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What type of hormone is used in rooting powders to promote root formation in plant cuttings?
What type of hormone is used in rooting powders to promote root formation in plant cuttings?
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What is the basic structural and functional unit of the nervous system responsible for transmitting impulses?
What is the basic structural and functional unit of the nervous system responsible for transmitting impulses?
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Which part of the neuron relays impulses it receives from the dendrons to the axon?
Which part of the neuron relays impulses it receives from the dendrons to the axon?
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Which hormone is associated with inducing dormancy in plants and suppressing bud growth?
Which hormone is associated with inducing dormancy in plants and suppressing bud growth?
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Which of the following is a function of gibberellins?
Which of the following is a function of gibberellins?
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Under parasympathetic nervous system control, what happens to salivary secretion?
Under parasympathetic nervous system control, what happens to salivary secretion?
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How do blood vessles on skin react to the stimulation of the sympathetic nervous system?
How do blood vessles on skin react to the stimulation of the sympathetic nervous system?
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Which hormone controls the opening and closing of stomata?
Which hormone controls the opening and closing of stomata?
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Which of the following describes the condition of erector muscles of the skin under sympathetic stimulation?
Which of the following describes the condition of erector muscles of the skin under sympathetic stimulation?
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Which physiological response is initiated by the hypothalamus to conserve heat when the body temperature drops below the normal range?
Which physiological response is initiated by the hypothalamus to conserve heat when the body temperature drops below the normal range?
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What is the primary function of vasodilation in thermoregulation when the body is overheating?
What is the primary function of vasodilation in thermoregulation when the body is overheating?
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Which part of the brain acts as the body's thermostat, regulating heat-producing and heat-losing processes?
Which part of the brain acts as the body's thermostat, regulating heat-producing and heat-losing processes?
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Which of the following is an example of behavioural regulation in response to cold?
Which of the following is an example of behavioural regulation in response to cold?
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During intense physical exercise, the body temperature rises. What is the hypothalamus's immediate response to this overheating?
During intense physical exercise, the body temperature rises. What is the hypothalamus's immediate response to this overheating?
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Besides sweating, which method do other mammals use to lose heat by evaporation?
Besides sweating, which method do other mammals use to lose heat by evaporation?
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How does stretching out the limbs while resting in bed help to regulate body temperature when it is hot?
How does stretching out the limbs while resting in bed help to regulate body temperature when it is hot?
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Which of these mechanisms is NOT an action of physiological regulation?
Which of these mechanisms is NOT an action of physiological regulation?
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What is the function of Chlorine terase in the context of neurotransmission?
What is the function of Chlorine terase in the context of neurotransmission?
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Why do synapses ensure that impulses travel in one direction only?
Why do synapses ensure that impulses travel in one direction only?
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At which part of the nervous system do drugs like heroin act to affect the body?
At which part of the nervous system do drugs like heroin act to affect the body?
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According to the 'all or none' principle, what determines the speed of an impulse?
According to the 'all or none' principle, what determines the speed of an impulse?
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Which characteristic is exclusive to a reflex action when compared to a voluntary action?
Which characteristic is exclusive to a reflex action when compared to a voluntary action?
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The reflex arc is best described as:
The reflex arc is best described as:
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Which of the following actions is NOT usually considered a reflex action?
Which of the following actions is NOT usually considered a reflex action?
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In a reflex action, what is the role of muscle receptor cells?
In a reflex action, what is the role of muscle receptor cells?
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Flashcards
Biology as Technology
Biology as Technology
Biology is viewed as the most powerful technology for solving global issues.
DNA as Software
DNA as Software
DNA is described as the software that directs cellular functions.
Cells as Factories
Cells as Factories
Cells function like factories, producing proteins and carrying out processes.
Evolution and Outdated Software
Evolution and Outdated Software
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The term 'Impossible'
The term 'Impossible'
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Physiological regulation
Physiological regulation
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Behavioral regulation
Behavioral regulation
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Hypothalamus
Hypothalamus
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Vasodilation
Vasodilation
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Sweating
Sweating
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Heat loss processes
Heat loss processes
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Temperature receptors
Temperature receptors
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Heat production processes
Heat production processes
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Calcitonin
Calcitonin
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Parathyroid Hormone
Parathyroid Hormone
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Medullary Thyroid Cancer (MTC)
Medullary Thyroid Cancer (MTC)
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Triiodothyronine (T3)
Triiodothyronine (T3)
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Thyroxine (T4)
Thyroxine (T4)
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Hyperthyroidism
Hyperthyroidism
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Hypothyroidism
Hypothyroidism
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Goitre
Goitre
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Synthetic auxins
Synthetic auxins
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Auxins
Auxins
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Gibberellins
Gibberellins
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Effects of gibberellins
Effects of gibberellins
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Cytokinins
Cytokinins
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Abscisic acid
Abscisic acid
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Ethylene
Ethylene
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Applications of plant hormones
Applications of plant hormones
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Autonomic Nervous System
Autonomic Nervous System
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Neuron
Neuron
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Cell Body (Soma)
Cell Body (Soma)
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Dendrite
Dendrite
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Axon
Axon
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Impulses
Impulses
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Nervous System Functions
Nervous System Functions
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Acetylcholine
Acetylcholine
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Chlorine terase
Chlorine terase
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Synapse
Synapse
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Impulse Directionality
Impulse Directionality
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Threshold Stimulus
Threshold Stimulus
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Reflex Action
Reflex Action
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Reflex Arc
Reflex Arc
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Voluntary vs Involuntary Actions
Voluntary vs Involuntary Actions
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Study Notes
Year 12 Biology E-Note
- Biology is the most powerful technology; DNA is software, proteins are hardware, and cells are factories.
- The world has many trillion-dollar problems, and biology is the only way to solve them.
- Biology is a software process; trillions of cells make up our bodies, each governed by this process. Current biological software is outdated, having evolved in a different era.
- "Impossible" is not a scientific term.
Award Page
- Students were recognized for academic excellence and practical skills.
- Awards were given for individual academic performance and practical distinction in Biology.
2023/2024 Biology Scheme of Work (Term 1)
- Week 1: Revision from Year 11, Beginning of Term Test, Reproductive System in Plants.
- Week 2: Regulation of Internal Environment of Organisms (I).
- Week 3: Regulation of Internal Environment of Organisms (II).
- Week 4: Plant Hormones.
- Week 5: Nervous Coordination (I).
- Week 6: Nervous Coordination (II).
- Week 7: Peripheral Nervous System.
- Week 8: Sense Organs / Structure and Functions of Neuron.
- Week 9: Sense Organs / Reflex and Voluntary Actions.
- Week 10: Sense Organs / Experiments on Dog, Food, and Bell.
- Week 11: Revision
- Week 12: Examination
Regulation of the Internal Environment (Unit 1)
- Organs usually find themselves in a constantly changing environment requiring self-regulation (homeostasis).
- Homeostasis is maintaining internal stability despite external changes.
- Conditions necessary for proper bodily function: proper chemical concentrations, temperature, pH (acidity), osmotic pressure, etc.
Kidney as a Structure of Homeostasis
- The human kidney is bean-shaped, located in the abdomen, with an outer cortex and inner medulla.
- Tubules called nephrons are present.
- The kidney maintains homeostasis by controlling water, ion, and other substance levels in the blood through osmoregulation and excretion.
Diseases of the Kidney
- Kidney Stone: Small solids (e.g., calcium phosphate) block the nephrons.
- Diuresis: Kidney tubules fail to reabsorb water.
- Nephritis (or Oedema): Inflammatory diseases of the glomeruli; causes kidney swelling.
The Liver as an Organ of Homeostasis
- The liver is the largest gland weighing about 1.25 kg and is located below the diaphragm. It is responsible for filtering the blood, converting glucose to glycogen, detoxification, and producing bile among other functions.
Function of the Liver
- Blood sugar regulation by converting excess glucose to glycogen for storage (insulin).
- Regulation of blood proteins like fibrinogen, prothrombin, and globulin.
- Detoxification (processing harmful substances).
- Biliary function (producing and storing bile for fat digestion).
- Production of heat.
Diseases of the liver
- Diabetes Mellitus: Inability of the liver to convert glucose to glycogen due to lack of insulin.
- Infective Hepatitis (Viral Hepatitis): Inflammation of liver cells due to viruses.
- Gall Stones: Stones formed in the gall bladder; disrupt bile flow.
- Cancer of the Liver: Outgrowth of unregulated cells preventing normal liver function.
- Cirrhosis: Damaged liver cells replaced by useless fibrous tissue.
- Jaundice: Breakdown of red blood cells causing excess bilirubin.
Hormonal Coordination (Unit 2)
- Endocrine system includes glands that produce and release hormones to regulate bodily functions.
- Hormones are chemical messengers carried by the blood stream that affect target organs.
Types of Plant Hormones
- Auxins: Stimulate or inhibit growth, responsible for phototropism (responding to light), geotropism (responding to gravity), and apical dominance.
- -Common examples are; indoleacetic acid (IAA), 2,4-D, and NAA.
- **Gibberellins:**Promote growth, influence fruit development, and break seed dormancy.
- Cytokinins: Stimulate cell division, promote lateral bud growth, delay aging.
- Abscisic Acid: Inhibits growth, promotes dormancy, regulates stomatal opening.
- Ethylene: Stimulates fruit ripening, promotes abscission (leaf/flower fall).
Coordination and Response (Unit 3)
- Coordination is harmonious functioning of all parts.
- Two communication systems are:
- Nervous system - fast, electrical impulses
- Endocrine system - slow, chemical hormones.
The Nervous System
- Central Nervous System (CNS): Brain and spinal cord
- Peripheral Nervous System (PNS): Nerves outside CNS
- Somatic Nervous System (SNS): Voluntary actions
- Autonomic Nervous System (ANS): Involuntary actions;
- Sympathetic: Fight-or-flight response
- Parasympathetic: Rest-and-digest response
The Brain
- Forebrain: Cerebrum, olfactory lobes, thalamus, hypothalamus
- Midbrain: Optic lobes, pineal body, pituitary gland.
- Hindbrain: Cerebellum, pons, medulla oblongata
The Spinal Cord
- Conducts impulses between brain and body.
- Centre for reflex actions.
Reflex Actions
- Involuntary, rapid responses to stimuli.
- Do not involve the brain in the decision-making process
Sense Organs
- Special organs that detect stimuli from the environment:
- Eyes
- Ears
- Nose
- Tongue
- Skin
The Ear
- External ear (pinna, auditory canal)
- Middle ear (eardrum, ossicles)
- Inner ear (cochlea, semicircular canals)
The Eye
- Sclera (outer layer)
- Cornea (transparent front)
- Choroid (middle vascular layer)
- Lens (focuses light)
- Retina (light-sensitive inner layer)
- Optic nerve (carries visual information)
- Accommodation (adjusting focus)
The Tongue
- Taste buds detect taste sensations.
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Description
Test your knowledge on key biological concepts and hormonal functions as discussed by renowned personalities like Arvind Gupta and Ray Kurzweil. This quiz covers comparisons of biological components, the impact of biology on global issues, and various hormone functions including calcitonin and triiodothyronine.