Science Semester 2 2020 EOS Exam
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Science Semester 2 2020 EOS Exam - Marcador
Science Semester 2 2020 EOS Exam - Detalles
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Preguntas:
45 preguntas
| 🇬🇧 | 🇬🇧 |
| What are the two types of lens? | Concave and Convex |
| What happens when light passes through a lens? | It always refracts and passes through a point called the focus. |
| What are the 7 parts of the eye called? | Sclera, Retina, optic nerve, cornea, lens, pupil, iris |
| What is the nerve connected to the eye? | Optic nerve |
| What is refraction? | The phenomenon of light, radio waves ect passing through mediums of varying density, changing the speeds. |
| What is the speed of light through air? | 300,000 km/s |
| What happens when light enters a denser medium? | Speed is decreased, causing refraction. |
| What happens to rays when it enters a double convex lens? | They converge into a focus. |
| What happens when rays enter a double concave lens? | The light rays are diverged and spread out. |
| What happens with long-sightedness? | Light rays refracted by the lens focus behind of the retina |
| What happens with short-sightedness? | The light rays refracted by the lens focus infront the retina |
| What is the cornea's purpose? | Controls the entry of light into the eye, bending or refracting to focus light. |
| What is the purpose of the pupil | Controlling the amount of light entering the eye - light reflex |
| What is the purpose of the iris? | Shrinks or widens the pupil to regulate light |
| Lens and retina relationship? | The lens focuses rays to the retina to send through the optic nerve. |
| What does the retina do? | Absorb and convert light to electrochemical impulses. |
| What is the refractive index? | A measurement of how dense a medium is. |
| When does light bend toward the normal? | When entering a substance of higher density |
| When does light bend away from the normal? | When entering a substance of lesser density |
| What are the three main types of nerves? | Relay, Sensory and Motor |
| What is the endocrine systems function? | To regulate the body by releasing chemicals to change mood, production ect. |
| What are the 4 parts of a neuron? | Cell body, myelin sheath, axon, dendrite |
| What does homeostasis do? | Maintains internal conditions within a range that your metabolism can tolerate. |
| What does the pancreas do if you have high blood sugar? | Releases insulin |
| What does the pancreas do if you have low blood sugar? | Releases glucagon |
| What are the main parts of the central nervous system? | Brain and spinal cord. |
| What is the peripheral nervous system? | Carries messages to the CNS and is made up of all the nerves outside of the CNS. |
| What are the two parts of the PNS | Somatic nerves and Autonomic nervous system |
| Somatic nerves role? | Controls voluntary movement of skeletal muscle. |
| Autonomic nervous system role? | Controls involuntary actions - breathing, sweating, heartbeat |
| What does a sensory neuron do? | Sense and receive info from receptors to pass onto other neurons. |
| What are the 3 barriers of defense? | Skin, Specific immune repsonse and Innate immune response |
| How does the specific immune respone work? (In simple terms) | Antibodies create different fittings to dock onto the antigen infection. T Lymphocytes kill any cell with infection. |
| What do macrophages do? | Eat away at the infection |
| What is the humoural response? | The response against infection in the bodies fluids. |
| What is the Innate immune response? | Immune response from diseases that your mum was exposed to. |
| What is the purpose of memory cells? | To retain information on how to deal with a specific infection |
| What happens when you sense something? | Sensory neurons send the info to the brain, which then sends it down via motor neurons to react |
| What does it mean when a part of the brain is closer to the spinal cord? | It means the function will be more basic. |
| What are the main parts of the brain called? There are 5 | Parietal Lobe, Frontal lobe, Temporal lobe, occipital lobe and Cerebellum |
| What is the purpose of the Thalamus? | It acts as a router, sorting data and sending it to specific parts of the brain |
| Cerebellum purpose? | Body control, motion and memory. |
| Hypothalamus purpose? | Homeostasis and controlling the posterior pituitary gland. |
| Cerebrum purpose? | Integration of data, left hemisphere for reasoning, thinking and right hemisphere for processing, facial recognition etc. |