#BiologyLessons
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vijayadworld · 9 months ago
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Cranial Nerves Nuclei Anatomy Notes
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borborich67 · 5 years ago
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Весна с утра заглянула в окошко. 😉 Подарила иллюстрацию из учебника Ботаники. ☝️🤓 #spring #springphotography #flovers #homeflowers #oleander #biology #pic #green #leaf #cell #biologylesson #springsun #sunnyday #BorBorich67 #mylook #instabiology #instaleaf #instasprint #instapic #flora #биология #ботаника #весна #картинка #клетка #солнце #весеннийдень #листик #урокбиологии #флора https://www.instagram.com/p/B9MpGwvICvd/?igshid=s9jfc791b1vu
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Conversation
Peer: my red pen is leaking can you help me with this.
Brain: ooh looks like blood, what did you do? :D
Me: yeah of course, kinda looks like blood.
Peer: yeah thanks.
Me: *staring at the red marks on his pencil case* I...like the sight of blood.
Peer 2: did you just say you like the sight of blood
Me: yep, why?
Peer 2: you need better hobbies.
30 minutes later
Peer 2: so yeah guns are more efficent at killing people.
Me: but knives are more fun.... Messier but more fun.
Peer 2: im scared for your future
Me: *not listening* but... Poison is harder to track down... Also you could argue its more efficent...
Peer 2: okay....
Me: oh sorry im just morbidly curious about stuff like that
Brain: shes onto you, when do we kill her.
Me internally: your dumb you got me into this, and we are not killing her.
Brain: but I allready divised a perfect plan.
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thek8school · 4 years ago
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Human Nervous System
#humannervoussystem #nervoussystem #nerves #science #sciencelessons #scienceforkids #biology #biologylessons #humanbody #humananatomy #humanbodydiagrams #humanbodyparts #homeschooling #onlinelearning #onlinelessons
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postcardstopoliticians · 8 years ago
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Today in postcards: the talk
Dear Senator Toomey,
Well, this is awkward, but I have to explain something. You see, during something called the menstrual cycle, the lining of a uterus-possessing person’s uterus grows and thickens. If the ovum released during that cycle’s ovulation becomes fertilized (you know how that happens, right? I do hope so), this lining nourishes the resulting embryo (a bundle of cells that may or may not become a baby someday). Should the ovum not be fertilized, the lining is shed in a process known as menstruation or a period (you may also know this as “a visit from Aunt Flow” or “lady troubles”). I’m telling you this, because you seem to be unaware of the relationship between pregnancy and menstruation. The former you consider a matter appropriate for you to legislate; the latter, your staff apparently considers an obscenity that should not be mentioned by your constituents. If you would like to avoid hearing about uterine lining, I strongly suggest pulling out of any discussion over how people ought to manage their own uteruses.
 Warm regards,
Owen
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soffywayspringstuff-blog · 8 years ago
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МГУ увидела первый раз за все мои 16 лет жизни👍🏻 #мгу#университетмгу#ночь#night#mgu#russianuniversitymgu#student#school#pupil#evening#tonigh#awesome#tired#biologylessons#reallywanthome#moscowstateuniversity#msu#soffyko (at МГУ - Moscow State University)
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tharahmalia · 9 years ago
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Movement of Substance
This is the review of the lesson for my students preparing continual assessment, please take a look:
DIFFUSION
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Diffusion: is the net movement of particles (atoms, Ions or molecules) from a region of high concentration to a region of low concentration (down a concentration gradient). The rate of diffusion is increase by:
• Higher concentration gradient
• Higher temperature
• Lighter particles
The difference in concentration of a solute between two regions in a fluid is known as the concentration gradient.
Diffusion occurs in both liquid eg. Coffee crystal and gas eg. perfume.
A membrane is not required (although sometimes a fully permeable membrane was used to isolate large molecules in the same fluid eg. cells’ membrane limit larger molecules to pass through such as starch or protein while allowing smaller molecules such as gases and glucose to diffuse across.
The different types of particles diffuse independently of each other.
OSMOSIS
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Osmosis: is the movement of water molecules from a solution of higher water potential to a solution of lower water potential through a partially permeable membrane.
Water potential is a measure of tendency of water to move from one place to another. A solution with lower concentration has higher water potential.
Isotonic=same water potential,
Hypertonic=lower water potential,
Hypotonic=higher water potential.
Turgidity: Placing living cells in a solution with higher water potential than the cell’s fluid, water enter the cells. For plant cell, the presence of rigid cell walls prevent bursting of the cell, water enters the cell causing it to expand, it become turgid. For animal cells, there are no cell walls thus the cells will eventually burst.
Plasmolysis: Placing plant cells in a solution with lower water potential than the cell’s fluid, water leave the cells causing shrinkage of the cytoplasm and cell membrane away from the cell wall.
Crenation: Placing animal cells in a solution with lower water potential than the cell’s fluid, water leave the cells causing shrinkage of the cells and little spikes appear on the cell surface membrane. The cells are dehydrated and die eventually.
ACTIVE TRANSPORT
Active Transport: is the movement of substances against a concentration gradient. Respiration energy is needed.
Down a concentration gradient: smaller molecules diffuse by passive transport, only large molecules need active transport
Up a concentration gradient: both large and small molecules needed to use active transport:
Dissolved mineral salts by root hairs
Glucose and Amino acids by small intestine of human.
SURFACE AREA TO VOLUME RATIO
Living organisms are made up of many small cells to increase the cells membrane surface area to volume ratio to increase rate of diffusion & osmosis.
Cells responsible for absorption of nutrient are modified to maximize the surface area to volume ratio:
• Red blood cells have flattened and biconcave shape.
• Root hair cells have long protrusion.
• Small intestine epithelial cells have microvilli.
Source: 
Kwan, L.P  and Lam, E.Y.K. (2013). Biology Matters GCE ‘O’ Level 2nd Edition. Marshall Cavendish: Singapore.
http://www.100qns.com/movement-of-substances.html
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vijayadworld · 2 months ago
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Hirschsprungs Disease
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vijayadworld · 2 months ago
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Incisional Hernia Treatment
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vijayadworld · 2 months ago
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Inflammatory Bowel Diseases
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vijayadworld · 3 months ago
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Hernia Types and Treatment
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vijayadworld · 3 months ago
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Hernia Types, Symptoms and Treatment
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vijayadworld · 3 months ago
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Helicobacter Pylori Infection, Complications and Treatment
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vijayadworld · 3 months ago
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Hepatocellular Carcinoma: Causes, Symptoms, Treatment
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vijayadworld · 3 months ago
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Haemorrhoids – Treatments and Complications
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vijayadworld · 3 months ago
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Gastrointestinal Stromal Tumor Treatment
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