organisations Flashcards
Name one of the organs in the digestive system where digestion takes place.
stomach or ‘small intestine’
Which organ system coordinates the actions of the body?
nervous system
The circulatory system, the nervous system and the digestive system are all examples of what?
organ systems
Cells form tissues. Tissues form __________. What word completes the sentence?
organs
What type of tissue produces enzymes?
glandular
What type of tissue produces digestive juices in the stomach?
glandular
What type of tissue is found in the stomach and is used to churn its contents?
muscular
What is the name given to biological catalysts?
enzymes
Enzymes can be affected by acidity and alkalinity. What name is given to the scale that measures acidity and alkalinity?
ph scale
What enzyme is produced in the salivary glands?
amylase
What is the missing word? Enzymes are described as biological catalysts because they increase the __________ of biochemical reactions inside and outside living cells.
rate/speed
What scientific name is given to the temperature or pH at which an enzyme works best?
optimum ph
what system is this? liver, stomach, large intestine , small intestine?
digestive system
what organ produces bile?
Liver
True or false? The small intestine produces enzymes.
True
Digestive enzymes break down food into molecules that are small enough to be… what? absorbed into the bloodstream -dissolved in water- evaporated
absorbed into the bloodstream
What is the missing word? High temperatures change an enzyme’s __________ and stop it working.
structure/shape
When a protein molecule permanently changes its shape on being heated, this is known as __________. What word completes the sentence?
denatured
True or false? Enzymes are made of proteins.
True
Which of the following processes does not require enzymes? - osmosis - replicating DNA - digestion
osmosis
True or false? Enzymes are described as biological catalysts because although they take part in biochemical reactions they are not used up in the process.
True
What is the missing word? If an enzyme is heated to a temperature of 50°C it stops working permanently. The enzyme is said to have become __________ .
Denatured
What word goes in blank A?
Enzyme reaction
protease A—-> amino acids
proteins
The products of digestion are used to build new carbohydrates, lipids, and what else?
Proteins
What cells in the blood help defend against infection?
White blood cells
Name the structures that increase the surface area of the lungs in humans.
“alveoli” or “alveolus”
How many chambers does the heart have?
4
Which type of blood vessel is the smallest?
capillary or capillaries
The sinoatrial node is a group of cells in the right atrium of the heart. It acts as a natural pacemaker, which means that it controls the __________ __________. What two words complete the sentence?
Heart rate or heart beat
where would you find the bronchi
lungs
where would you find the bronchi
lungs
After exposure to ionising radiation, cells can divide uncontrollably. This is known as what?
cancer
What drugs can be used to lower blood cholesterol levels?
statins
Health is the state of physical and __________ well-being.
What is the missing word in this sentence?
mental
Which plant organ absorbs the most light for photosynthesis?
leaf
True or false? The epidermis of leaves of plants absorbs water for photosynthesis.
false
Which type of tissue is found covering the organs of plants?
epidermis
Name the type of plant tissue in which most photosynthesis takes place.
mesophyll
Which tissue transports water around a plant?
xylem
Which tissue transports water around a plant?
xylem phloem
Name the gas that plants need to take in from the air for photosynthesis. Give the full name, not the symbol.
carbon dioxide
Most of the gaseous exchange that occurs in a plant happens in what organ?
leaf
Most of the water vapour lost from a plant is lost from the… what?
leaf
What name is given to the pores in the surface of a leaf that allow gases in and out?
stomata
Name the type of cells that give roots a greater surface area for absorption.
root hair cells
The movement of water from the roots, through the plant and out of the leaves is known as the… what?
transpiration
What plant tissue located at the tips of roots and shoots will differentiate into different plant cells?
meristem
Which of these is an example of a plant organ?- stem- epidermis-mesophyll
stem
name a plant tissue
xylem
If a plant is losing water faster than it can be replaced by its roots, its stomata will __________. What one word completes the sentence?
close
Where do plants on land get their ions from?
soil
