UPMSP High School Human Science common mistakes
UPMSP High School Human Science · Understand the traps and how to avoid them.
Stating that all arteries carry oxygenated blood and all veins carry deoxygenated blood, then mislabelling the pulmonary artery and pulmonary vein in a heart/lung diagram.
The candidate memorises the simplified artery=oxygenated rule from lower classes and never rehearses the pulmonary-circuit exception, so the rule is applied mechanically under exam pressure.
What to do instead
Redraw the double circulation with arrows and label each vessel by direction to/from the heart, not by oxygen status. Drill the two exceptions: pulmonary artery carries deoxygenated blood to lungs; pulmonary vein carries oxygenated blood to left atrium. Add a one-line correction at the top of revision notes.
Describing villi only as 'finger-like projections that increase length' and confusing the site of digestion with the site of absorption; for example, saying fat is absorbed in the stomach or that bile digests fat into fatty acids and glycerol.
Diagrams are memorised as labels without linking structure to function, and enzyme action is learned as a list rather than as organ-by-organ sequence.
What to do instead
Build a four-column table for each organ: secretion/enzyme, substrate, product, absorption route. For villi, write three functions: increase surface area, rich blood capillaries for glucose/amino acids, lacteal for fatty acids and glycerol. Practise tracing one meal through the alimentary canal.
In first aid, applying butter, oil, toothpaste or ink to a burn; bursting burn blisters; pulling out an embedded object; or moving a suspected spinal-injury casualty to make them comfortable.
Home remedies and 'rescue' instincts override taught first-aid protocols, and candidates confuse cleaning a wound with applying substances to a burn.
What to do instead
Memorise short refusal rules: no ointment, no ice directly, no blisters burst; cool a burn under clean running water for about 20 minutes and cover with a clean non-stick cloth. For an embedded object, pad around it and immobilise. For suspected spinal injury, do not move unless there is immediate danger; call for help and keep the head aligned.
Naming a hormone without its gland, target organ and effect, and mixing up insulin/glucagon, thyroxine/TSH, or adrenaline/noradrenaline.
Hormones are learned as isolated names from a chapter list; the source-target-effect chain and negative feedback are not practised, so similar-sounding hormones collapse together.
What to do instead
Make a hormone map with columns: gland, hormone, target, main effect, disorder of excess/deficiency. Add feedback arrows for thyroid and blood glucose. Use contrast pairs: insulin lowers blood glucose; glucagon raises it; TSH stimulates thyroid; thyroxine raises metabolic rate. Test yourself by covering one column.
Getting menstrual-cycle days wrong, such as placing ovulation at the end of the cycle, saying menstruation occurs at ovulation, or describing the corpus luteum as present before ovulation.
The cycle is memorised as a vague sequence of 'bleeding, egg, pregnancy' without a day-by-day timeline or hormone linkage.
What to do instead
Draw a 28-day timeline: menstruation roughly days 1–5; follicle growth and oestrogen rise before day 14; LH surge and ovulation around day 14; corpus luteum and progesterone after ovulation. Add what happens if fertilisation does not occur. Use the timeline to answer both 'what is happening' and 'which hormone is high' questions.
Explaining communicable-disease spread only as 'dirty air' or 'bad touch', and not matching diseases to droplet, airborne, direct contact, vehicle, or vector transmission; prevention answers then become generic 'keep clean' statements.
Hygiene slogans are repeated without a transmission matrix, so the mode of spread and the specific preventive measure are not linked.
What to do instead
Prepare a transmission table: disease, causative agent type, mode of spread, one specific prevention, one specific control measure. For example, tuberculosis-droplet/airborne-cover cough, ventilation; malaria-vector-mosquito nets, stagnant-water control; cholera-vehicle/faecal-oral-safe water, sanitation. Practise matching prevention to mode, not to the disease name alone.
Preparing ORS with incorrect proportions, such as adding more salt than sugar or using a pinch without measuring; saying ORS stops diarrhoea; discarding colostrum; or giving an incomplete immunisation schedule.
Folk practices and 'more salt is better' reasoning override standard oral rehydration and infant-feeding messages, and schedules are learned as names without timing.
What to do instead
Memorise the standard home ORS measure: 1 litre safe water, 6 level teaspoons sugar, half a level teaspoon salt; ORS replaces lost water and salts, it does not stop diarrhoea. State that colostrum is the first thick yellowish milk and should be given. Write the immunisation schedule as a timeline with age and vaccine, and include vitamin A and growth monitoring where relevant.
Mixing nephron parts and urine-formation steps, for example saying reabsorption happens in the glomerulus or that urine is formed entirely by filtration; and explaining water–salt balance as 'kidneys only' without ADH, aldosterone, thirst, skin and lungs.
The nephron is memorised as a labelled diagram, not as a flow of filtrate, and homeostasis is studied as a definition rather than as a multi-organ control system.
What to do instead
Trace filtrate in order: glomerulus → Bowman's capsule → proximal tubule → loop of Henle → distal tubule → collecting duct. Beside each, write filtration, reabsorption, secretion. Build a homeostasis table: kidney adjusts water/salts; ADH increases water reabsorption; aldosterone increases sodium reabsorption; skin and lungs also lose water.
Treating consumer awareness as a vague 'buy good quality' answer and not reading or naming label information: MRP, expiry/best-before date, batch number, ingredient list, net quantity, manufacturer address, licence number, and the correct mark such as ISI, Agmark, FSSAI or Hallmark.
The topic is answered with slogans instead of a checklist, and certification marks are confused because they are memorised without the product category they apply to.
What to do instead
Make a label-reading checklist and apply it to one packaged food, one electrical appliance and one gold ornament. Match marks to categories: FSSAI for food, ISI for industrial/electrical goods, Agmark for agricultural produce, Hallmark for gold. Practise writing a short complaint with date, bill, batch number and remedy sought.
Reversing antagonistic muscle pairs and joint types, for example saying the triceps flexes the elbow and the biceps extends it, or calling the knee a ball-and-socket joint; also listing skin layers in the wrong order.
Similar terms are learned from a diagram without acting out the movement or classifying joints by the number of axes and shape of articulating surfaces.
What to do instead
Demonstrate each action on your own body: biceps flexes elbow, triceps extends; quadriceps extend knee, hamstrings flex. Build a joint table: hinge-elbow/knee; ball-and-socket-shoulder/hip; pivot-neck; gliding-wrist. For skin, write the order from outside inward and add one function for each layer.