Body systems and how they connect: question bank

Q1

FoundationSystems and organs

Put these in order, from smallest to largest: organ, cell, organ system, tissue.

cell → tissue → organ → organ systemcell → organ → tissue → organ systemtissue → cell → organ → organ systemorgan → tissue → cell → organ system

Q2

FoundationSystems and organs

Which organ belongs to two systems at once: it sends digestive juice into the small intestine AND releases the hormone insulin?

LiverPancreasStomachGall bladder

Q3

FoundationSystems and organs

Which of these is NOT one of the seven main organ systems described in this topic?

DigestiveRespiratoryPhotosyntheticExcretory

Q4

CoreSystems and organs

Skin is usually classed as part of the excretory system. Why?

It absorbs oxygen directlySweat carries out water, salt and a little ureaIt digests food on its surfaceIt produces red blood cells

Q5

CoreSystems and organs

The endocrine system sends messages using hormones in the blood, while the nervous system uses electrical signals in nerves. Which best describes the trade-off between them?

Hormones are always better because they last longerNerves are fast and precisely aimed; hormones are slower but reach the whole body and last longerThere is no real difference between themHormones travel faster than nerve signals

Q6

StretchSystems and organs

A doctor examining a patient notices swollen lymph nodes in the neck. Which system's activity does this most directly reflect?

SkeletalImmune (via the lymphatic system)DigestiveMuscular

Q7

StretchSystems and organs

Why is it more accurate to say the seven organ systems are "seven good questions to ask about a body" rather than "seven separate machines"?

Because organs are randomly assigned to systemsBecause many real organs serve more than one system at once, like the pancreas and skinBecause the body only really has one systemBecause scientists cannot agree on the number of systems

Q8

ChallengeSystems and organs

The bins in a "sort organs into systems" game are described as "labels, not walls". Which statement best explains what this means scientifically?

Organs can be sorted into exactly one system with total confidenceA classification scheme is a human tool for organising observations, and real biology does not always respect the boundaries of that schemeThe seven systems are entirely arbitrary and could be replaced by any other numberOnly the liver and pancreas break the rule; every other organ fits one system perfectly

Q9

FoundationDigestion

At which station does food actually cross into your blood?

The mouthThe stomachThe villi of the small intestineThe large intestine

Q10

FoundationDigestion

What does saliva start breaking down, using the enzyme amylase?

ProteinStarchFatVitamins

Q11

FoundationDigestion

What does bile do?

It is an enzyme that digests proteinIt breaks fat into tiny droplets, with no enzyme involvedIt neutralises stomach acid onlyIt absorbs sugar directly

Q12

CoreDigestion

Roughly how long does food take to travel from mouth to being passed out, according to this topic's figures?

A few minutesAbout one to three daysAbout one weekAbout one month

Q13

CoreDigestion

A cube of food 3 cm on each side is cut into cubes 1 cm on each side. How many small cubes result?

Your answer (cubes)

Q14

CoreDigestion

Why does chewing food more thoroughly help digestion, according to this topic's reasoning?

Chewing adds more enzymes to the foodSmaller pieces create more surface area for enzymes to act on, without adding any foodChewing warms the food to body temperatureIt makes the food weigh less

Q15

StretchDigestion

The claim that the small intestine has "200 to 300 square metres of surface, like a tennis court" is now considered an overstatement. What is closer to the modern measured figure?

About 3 m²About 30 m²About 300 m²About 3,000 m²

All 79 questions