Notes, summaries, assignments, exams, and problems for Primary education

1) Physical Barriers Against Infection

Physical barriers are crucial in preventing microbes from reaching susceptible tissues.

Cellular Contributions to Physical Barriers

At the cellular level, tightly joined cells form barriers, preventing invaders from penetrating deeper tissues.

Microbial Evasion of Physical Barriers

Pathogens may use enzymes like proteases to damage physical barriers and gain entry.

2) Layers of Human Skin

Human skin has three layers:

1. Epidermis: Outer layer containing keratin (prevents microbial entry).

2. Dermis: Middle layer with hair follicles, sweat glands, nerves, and blood vessels.

3. Hypodermis: Inner layer with fatty tissue, blood, and lymph vessels.

Significance of Keratin, Fatty Acids, and Skin Shedding

• Keratin: Tough,

A Dramatic Experience

One Saturday afternoon, my friends and I decided to explore an old abandoned house on the outskirts of town. The sun was setting, and everything looked spooky as we walked up to the house. We had heard stories that it was haunted, but we didn't believe them.

As we entered, the floor crunched with every step. There was dust everywhere, and spider webs hung from the ceiling. We tried to be brave and made jokes to hide our fear. Suddenly, we heard a loud noise from the floor above. Our hearts began to race, but we decided to go and have a look.

In one of the rooms, a window had been broken, and a cold wind was coming in. As we were about to leave, the door closed with a bang. We all became frightened and screamed for help. Try... Continue reading "Unforgettable Personal Experiences: Thrills, Heartbreak, and Laughter" »

In Your Opinion, What Is the Most Difficult Language to Learn? Explain Your View.

I think it depends on what your mother tongue is. For example, Chinese is difficult to Spanish people because vocabulary and pronunciation are completely different.

Is It Good to Adopt English Words or Is It Better to Preserve or Find Equivalents in Your Own Language?

In my opinion, it is better to preserve or find equivalents in our own language when it is possible. Only if it does not exist equivalent in our language it could be good to adapt English words.

Should We All Speak the Same Language? Which One? Is This Possible and Would This Make the World a Better Place?

No, we shouldn't. I don't think that it would be possible. And if that were possible, the world... Continue reading "The Challenges of Language Learning and Globalization" »

Essential English Vocabulary

Here's a list of useful English words and phrases, along with their meanings:

• To put off: To postpone or delay
• Stage: A step or phase in a process
• Prompt: On time or before the expected time
• Deadline: The last day or time by which something must be done
• Rush hour: Peak time when traffic is heaviest
• Sharp: Exactly on time (e.g., 9 o'clock sharp)
• Timing: The ability to do something at the right moment
• In a hurry: To be rushed or have a sense of urgency
• Plenty: A lot of; a large quantity
• Brief: Short in duration
• On time: Punctual; at the scheduled time
• At a time: At a particular moment
• Downtime: A period when you are less busy or doing fewer things
• Sidetracked: To be distracted from your main task
• Drag on: To continue for too long,

Popular Piano Songs: Easy Sheet Music

Rice Pudding

Fa Fa Fa Do
Do Fa Fa La Sol
The Sib The Sol Fa Do Re Do Mi Mi Mi Mi Fa

Do Fa La La Fa
Do Fa La La Sol
The Sib The Sol Fa Do Re Do Mi Mi Mi Mi Fa

Silent Night

Sol La Sol Mi
Sol La Sol Mi
If you do re re do Sol

La La La Sol's do If Sol Mi
La La La Sol's do If Sol Mi

re re re fa mi re do if
Sol Mi Fa Do Sol Re Do

re re re fa mi re do if
Sol Mi Fa Do Sol Re Do

Ode to Joy

If you do re re do If If The Sun Sol La Si Si La La
If you do re re do If If The Sun Sun Sun Sun The If's

The sun If the sun If you do If
If you do If the sun's La Re

If you do re re do If If The Sun Sun Sun Sun The If's

La Cucaracha

Fa La Do Do Do
Fa La Do Do Do
Fa Fa Mi Mi Re Re Do

Do Do Do Mi Sol
Do Do Do Mi Sol
do... Continue reading "Easy Piano Sheet Music: Popular Songs & Keyboard Positions" »

Ability

Expressing ability with modal verbs:

• Can (present ability): Can you speak French?
• Will be able to (future ability): She will be able to speak French in two months.
• Could (past ability, unrealized potential): I could have gone to university when I was younger.
• Be able to (general ability): She is able to speak Chinese.
• Was/were able to (past ability, achieved action): We were able to escape the fire.
• Couldn't/were not able to (negative past ability): We couldn't/were not able to finish the project.

Possibility

Expressing degrees of possibility:

• May (higher probability): He may be in his office.
• Might (lower probability): She might be 30 years old.

Certainty

Expressing certainty or impossibility:

• Must (certainty): He must be over 70.
• Can't (impossibility)

31 nervos pares
3º mes de vida= curvatura secundaria  cervical
6º mes de vida= curvatura secundaria lombar
2 curvaturas primarias: toracica e sacral.
2 cuvaturas secundarias: cervical e lombar.
4 curvaturas
Curvaturas da coluna vertebral:
Curvaturas primarias: mantem o sentido da curvatura da coluna fetal: toracica e sacral
Curvaturas secundarias: Cervical (surge em torno do 3º mes de vida, quando a criança ja sustenta o peso da cabeça.
Lombar: surge em torno do 6º mes de vida, quando a criança ja sustenta o corpo em posição ortostatica)
CURVATURAS NOMAIS:
Cifose: acentuação das curvaturas primarias= toracica e sacral
Lordose: acentuação das curvaturas secundarias= cervical e lombar
Quando a lordose é muito acentuada, denomina-se hiperlordose
Escoliose:... Continue reading "Notebook" »

40 camilo jose cela: la familia d pascual duart-pabyon d rposo-la  colmna-primr viaj andaluz carmn laforet: nada-la isla y los demonios-la mujer nueva ana matute:los abel-los niños tontos-cuent: l pais d la pizarra miguel delibes:el camino- las ratas- los santos inocentes gonz torr ballester: javier mariño- don juan

50 neorreal nacho aldecoa: el fulgor y la sangre- con el viento solano rafa sanch ferlosio: el jarama- el alma y la verwenza carmen martin gaite: entre visillos-retahilos-ritmo lento 50 r social juan goytisolo: juego de manos-la chanca alfonso grosso:florido mayo-la giralda j manu caballero bonald: dos dias d septiembre

60luis martin santos: tiempo de silencio juan benet: volveras a region- una meditacion fco umbral:balada d gamberros-... Continue reading "Drumasota" »

Submetida a um tratamento médico, uma pessoa ingeriu um comprimido contendo 45 mg de ácido acetilsalicílico (C9H8O4). Considerando a massa molar do C9H8O4 180g/mol e o número de Avogadro 6.10²³, o número de moléculas da substancia ingerida é?
Primeiro transformando mg para g

1g..................1000mg
x....................45mg

x = 0,045g

1 mol.........................180g

x................................0,045

x = 0,00025mol

1 mol...............6,0 . 10²³

0,00025............x

x = 1,50 . 10^20

A balança mais precisa pode detectar uma variação de aproximadamente 10( elevado -8g). Quantos átomos de ouro existiriam em uma amostra desse peso?
Primeiramente consulte uma tabela periódica para obter a massa atômica do ouro( ma = 197u)
assim, a