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Multicellular Organi
Multicellular Organisms
| Question | Answer |
|---|---|
| What is differentiation | the process of cells becoming specialised |
| What are stem cells | undifferentiated cells |
| Where are stem cells found | Embryos and adult bone marrow |
| What are the 7 Organ Systems | - The circulatory System - The digestive System - The immune System - The musculoskeletal System - The Nervous system - The respiratory system - THE REPRODUCTIVE SYSTEM |
| What does the circulatory system do | Blood carries oxygen and dissolved nutrients to the body's cells and waste products away from them |
| What does the digestive system do | breaks down food and absorbs nutrients, materials and water |
| What does the immune system do | Provides active defence against pathogen |
| What does the musculoskeletal system do | it supports our body, help us move and protect vital organs |
| What does the nervous system do | coordinates involuntary responses |
| What does the respiratory system do | allow air to pass in pas in and out of the body for efficient gas exchange to happen |
| name 9 digestive organs | mouth, oesophagus, liver, stomach, pancreas, small intestine, large intestine, rectum, anus |
| What are two things the mouth does in the digestion process | break down food with teeth, and saliva mix food with enzymes |
| What is the oesophagus | the thin tube that connect the mouth to the stomach |
| What does the liver release and what does the thing it releases break down | Bile. It breaks down lipids |
| What is the stomach | A muscular bag that mix food with acid |
| What does the pancreas release? list 3 things the thing it releases breaks down | Releases enzymes, breaks down carbohydrates, proteins, and lipids in food |
| What is a catalyst | a substance that increases the rate of a chemical reaction without being consumed or permanently changed. |
| what happens in the bone marrow | white and red blood cells gets produced |
| what movement is flexion | angle between two bones decease |
| what movement is extention | angle between two bones increase |
| what movement is abduction | movement away from the body |
| what movement is adduction | movement towards the body |
| what does the cerebrum control | thought, learning, memory, voluntary movement |
| what does the cerebellum control | regulates balance, posture, and coordination of movement |
| what does the medulla control | involuntary movements heart rate and breathing. |
| what is the reflex arc pathway | stimulus -> sensory neuron -> motor neuron -> effector |
| what does the inter neuron do | connect neurons with CNS |
| what do sensory neurons do | transmit impulses from receptors to the CNS |
| what do motor neurons do | transmit impulses from the CNS to effector |
| What does ligaments attach | bone to bone |
| what does tendons attach | muscle to bone |
| what are gametes | sex cells |
| what is another name for egg cells | ovum |
| what are oviparous animals | animals that reproduce by laying eggs |
| what are viviparous animals | animals that reproduce by giving birth to live young |
| what is gestation | the period of development between fertilization to live birth |
| what are the testes for | they produce sperm |
| what are the sperm ducts for | sperm travels from the testes to the urethra through them |
| what is the urethra for | the tube where sperm and urine leave the penis |
| what is the penis for | it releases sperm into the girl's vagina --- |
| what are the scrotums | they contain and protect the testes, keeping them cool. |
| what are the prostate gland | gland which secretes fluid to nourish sperm |
| what are the ovaries for | they contain hundreds of undeveloped female sex cells. (ova) |
| what are the oviduct for | it is the tube where the ova travel from the ovaries, and where the fertilisation happens |
| what are the uterus for | nourishes and protects the developing embryo through pregnancy |
| what is the cervix | it is a ring of muscle at the lower end of the uterus. it keeps the baby in place during pregnancy and widen during birth |
| vagina | where the girl recieve the sperm from the boy's penis |
| what is mitosis? | z type of cell division that produce new cells (except gametes |
| what is meiosis | a type of cell division that produces gametes |
| what is phenotype | physical information resulting from inherited information, plus sometimes the enviroment |
| what is a genotype | the genetic makeup of an organism, - the specific alleles it carries |
| what is an allele | a version of a gene. |
| what are two types of an allele | recessive or dominant |
| what is homozygous | both copies of a gene is identical (both reccesive or both dominant) |
| what is heterozygous | two different alleles for a gene |
| what are the characteristics of life | movement, respiration, reproduction, sensitiviuty, growth, excretion, nutrition |
| what are faeces | poo |
Created by:
Sumleung
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