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16 Cards in this Set
- Front
- Back
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What is the order of Organisms? |
Cells -> Tissue -> Organ -> System -> Organism |
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What is the interrelationship between the order? |
A group of cells doing a similar task are tissues. A group of tissues working together are called organs. Groups of organs working together are called systems. |
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Examples of Tissue, Organs and Systems? |
Tissue - Muscle, Skin, Nerve Organ - Liver, heart, intestines System - Circulatory, Digestive |
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What are nerve cells? |
Nerve cells are neurone that carry messages to and from the central nervous system. |
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What does the central nervous system consist of? |
The brain and the spinal cord. |
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Definition of cell, tissue, organ and organ system. |
Cell - Smallest entity of a living thing. Tissue - The material that we are made of. Organ - Self-contained; have a particular function. Organ System - A group of organs working together for a main function. |
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Parts of a Plant and Animal cell? |
Cell Wall, Chloroplast, Cytoplasm, Mitochondria, Ribosomes, Vacuole, Chromosomes, Nucleus, Nuclear Membrance, Cell Membrane |
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Parts of a nerve cell? |
Dendrite, axon, nucleus, node, sheath, axon terminal. |
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Three most important parts of the brain? |
Cerebrum, Cerebellum, Brain Stem. |
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How do nerve cells carry signal? |
Stimuli from organs change to electrical signals. Nerves carry the signals to the central nervous system. Brain decides what to do. Nerves carry the "what to do" signals to the pre-determined body part. |
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What is feedback? |
Feedback is a response in the bodily systems that stops the fluctuation (homeostasis) process once the levels reach an average. |
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What is the endocrine system? What are endocrine glands? What are hormones? |
Endocrine system works with the nervous system. Endocrine glands secrete hormones into the blood. Hormones are chemical messengers. |
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What glands are there? What hormones do they produce? What are their functions? |
Adrenal - Adrenaline : Readiness Ovaries - Progesterone, Oestrogen : Female sexual development Pancreas - Insulin, Glucagon : Blood glucose levels Pituitary - Growth, Anti-diuretic and stimulating hormones : Cell growth & development, water balance, control other glands hormone release Thyroid - Thyroxin : Rate of chemical reactions in cell Testes - Testosterone : Male sexual development |
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What is a uni-cellular organism? |
Single-celled organisms that live in the water and absorb nutrients through diffusion. |
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What are the organ systems and their functions? |
Respiratory - Extracts oxygen from air Digestive - Extracts nutrients from food Excretory - Extracts waste from blood Circulatory - Transports nutrients and oxygen to cells Skeletel - Supports body and protects organs Muscular - Movement Reproductive - Offspring Nervous - Controls body through electrical impulses in nerves Endocrine - Controls body through hormones
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What is the reflex arc? |
Reflexes are emergency responses. Once the situation is detected, the impulses pass along the sensory nerves to the central nervous system. Impulses are then passed to the motor neurones through relay neurones. Motor neurones transmit the impulses to an effecter (muscle; body part; etc.) |
