Stem cells and differentiation Biology AS cellular organisation

Pregunta 1 de 16

1

What are stem cells?

Selecciona una de las siguientes respuestas posibles:

They are cells that are specialised to carry out their function.
They are unspecialised cells that can develop into a different types of cell.
They are cells that are in plant stems.

Explicación

Pregunta 2 de 16

2

Where are stem cells found in humans?

Selecciona una o más de las siguientes respuestas posibles:

Heart
Kidney
Bone Marrow
Lungs
Early embryos
Tissue fluid

Explicación

Pregunta 3 de 16

6

Rellena los espacios en blanco para completar el texto.

Stem cells to become new cells, which then become .
The process by which a cell becomes specialised for its job is called .
Stem cells are able to divide to produce more cells, i.e. they can themselves.
In animals, stem cells are used to damaged cells.

Explicación

Pregunta 4 de 16

8

Selecciona la opción correcta de los menús desplegables para completar el texto.

Bones are living ( organs, systems, structures ), containing ( nerves, neurons, neutrophils ) and ( blood vessels, collagen, elastic fibres ).
The main bones in the body have ( marrows, memory cells, meristem ) in their centres.
Here, adult stem cells ( divide, join, move ) and ( differentiate, change, go ) to replace worn out blood cells – ( erythrocytes, phagocytes, neutrophils ) (red blood cells) and ( neutrophils, erythrocytes, phagocytes ) (white blood cells to fight infection).

Explicación

Pregunta 5 de 16

8

Plants are always ❌ so they need new ❌ and roots throughout their lives.
Stem cells in plants can ❌ into various plant tissues.
In plants, stem cells are found in ❌ (place where ❌ can take place).
In the root and the stem, stem cells of the ❌ divide and differentiate to become ❌ vessels and ❌ sieve tubes.

Arrastra y suelta para completar el texto.

growing

photosynthesising

respiring

shoots

leaves

differentiate

divide

change

meristems

marrow

mesophyll

vascular cambium

ventricle

veins

growth

respiration

photosynthesis

xylem

phloem

Explicación

Pregunta 6 de 16

2

What are the uses of stem cells in medicine?

Selecciona una o más de las siguientes respuestas posibles:

Scientists think they can be used to repair damaged tissue (e.g. heart)
Scientists think they can be used to treat neurological disorders (like Alzheimer’s and Parkinson’s).
Scientists think they can be used to cure bacterial diseases like TB.
Scientists think they can enable doctors to diagnose illnesses instantly.

Explicación

Pregunta 7 de 16

9

Rellena los espacios en blanco para completar el texto.

Heart disease means the tissue is so the body can’t replace damaged heart cells. Researchers are trying to develop ways of using stem cells to make heart cells to repair the damaged tissue.

Alzheimer’s  nerve cells in brain in increasing numbers causing severe loss. Researchers hope to use stem cells to regrow healthy cells in people with Alzheimer’s.

Parkinson’s disease causes uncontrollable tremors. Loss of cells in the brain that produce dopamine, which is needed to movement. Transplanted stem cells may help to the dopamine-producing cells.

Explicación

Pregunta 8 de 16

3

Red blood cells have the following functions and adaptations:

Selecciona una o más de las siguientes respuestas posibles:

They carry oxygen in the blood.
They have a biconcave disc shape so their is a larger surface area for gas exchange.
They have no nucleus so there is more room for haemoglobin.
They have a biconvex disc shape to give a larger surface area.
They send signals to the central nervous system.
They defend body against disease.

Explicación

Pregunta 9 de 16

1

What is the function of a neutrophil?

Selecciona una de las siguientes respuestas posibles:

To defend the body against disease.
To transport oxygen.
To send signals to brain.

Explicación

Pregunta 10 de 16

3

What are the adaptations of a neutrophil?

Selecciona una o más de las siguientes respuestas posibles:

Flexible shape allows them to engulf pathogens/foreign particles.
Many lysosomes in cytoplasm have digestive enzymes to break down engulfed particles
They have many mitochondria to provide energy for active transport
They have no nucleus.
They have multi-lobed nucleus.
They have cilia on their surface to beat pathogens away.

Explicación

Pregunta 11 de 16

7

❌ cells cover the surfaces of organs.
Cells joined by ❌ membranes and membranes at base.
Ciliated epithelia (airways) have ❌ that beat to remove particles away.
Other ones (in ❌ intestine) have ❌ to increase their surface area.
❌ epithelia (in lungs) are very thin to allow efficient diffusion of ❌

Arrastra y suelta para completar el texto.

Epithelial

Skin

Surface

interlinking

plasma

cilia

root hairs

microvilli

goblet cells

small

large

Squamous

gases

water

Explicación

Pregunta 12 de 16

6

Selecciona la opción correcta de los menús desplegables para completar el texto.

( Sperm, Egg ) cells have a flagellum so they can ( swim, jump ) to the egg.
Have lots of ( mitochondria, lysosomes ) to provide ( energy, enzymes ) to swim.
( Acrosome, Phagosome ) in head contains ( digestive, biological ) enzymes to enable sperm to penetrate the surface of the egg.

Explicación

Pregunta 13 de 16

1

Palisade mesophyll cells are in the roots.

Selecciona uno de los siguientes:

VERDADERO
FALSO

Explicación

Pregunta 14 de 16

4

Rellena los espacios en blanco para completar el texto.

mesophyll cells do most of .
They contain many so absorb lots of sunlight.
They have walls – so CO2 can easily diffuse into the cell.

Explicación

Pregunta 15 de 16

6

Selecciona la opción correcta de los menús desplegables para completar el texto.

( Root hair, Epithelium, Meristem ) cells:
absorb water + ( mineral ions, carbon dioxide, waste ) from soil.
have a ( large, small ) surface area for absorption.
Have thin, ( permeable, long, impermeable ) wall for entry of water and ions.
Have extra ( mitochondria, lysosomes, ribosomes ) (energy for active transport) in their ( cytoplasm, plasma membrane, vacuole ).

Explicación

Pregunta 16 de 16

7

❌ cells are found in ❌ with gap between them to form ❌.
These are tiny pores in surface of leaf for ❌ exchange.
In light, guard cells take up water and become ❌ (swollen).
Thin outer walls and thickened inner walls force them to bend outwards, ❌ stomata.
Allows gas exchange for ❌.

Arrastra y suelta para completar el texto.

Guard

palisade mesophyll

companion

pairs

triplets

stoma

stem cells

gas

water

solute

turgid

flaccid

small

opening

closing

photosynthesis

respiration

	Creado por Aaisha Ahmed hace más de 8 años

AS - Level Biology Test sobre Stem cells and differentiation Biology AS cellular organisation, creado por Aaisha Ahmed el 02/04/2016.

Stem cells and differentiation Biology AS cellular organisation

Pregunta 1 de 16

What are stem cells?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 2 de 16

Where are stem cells found in humans?

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 3 de 16

Rellena los espacios en blanco para completar el texto.

Stem cells to become new cells, which then become . The process by which a cell becomes specialised for its job is called . Stem cells are able to divide to produce more cells, i.e. they can themselves. In animals, stem cells are used to damaged cells.

Explicación

Pregunta 4 de 16

Selecciona la opción correcta de los menús desplegables para completar el texto.

Explicación

Pregunta 5 de 16

Arrastra y suelta para completar el texto.

Explicación

Pregunta 6 de 16

What are the uses of stem cells in medicine?

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 7 de 16

Rellena los espacios en blanco para completar el texto.

Explicación

Pregunta 8 de 16

Red blood cells have the following functions and adaptations:

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 9 de 16

What is the function of a neutrophil?

Selecciona una de las siguientes respuestas posibles:

Explicación

Pregunta 10 de 16

What are the adaptations of a neutrophil?

Selecciona una o más de las siguientes respuestas posibles:

Explicación

Pregunta 11 de 16

Arrastra y suelta para completar el texto.

Explicación

Pregunta 12 de 16

Selecciona la opción correcta de los menús desplegables para completar el texto.

Explicación

Pregunta 13 de 16

Palisade mesophyll cells are in the roots.

Selecciona uno de los siguientes:

Explicación

Pregunta 14 de 16

Rellena los espacios en blanco para completar el texto.

mesophyll cells do most of . They contain many so absorb lots of sunlight. They have walls – so CO2 can easily diffuse into the cell.

Explicación

Pregunta 15 de 16

Selecciona la opción correcta de los menús desplegables para completar el texto.

Explicación

Pregunta 16 de 16

❌ cells are found in ❌ with gap between them to form ❌. These are tiny pores in surface of leaf for ❌ exchange. In light, guard cells take up water and become ❌ (swollen). Thin outer walls and thickened inner walls force them to bend outwards, ❌ stomata. Allows gas exchange for ❌.

Arrastra y suelta para completar el texto.

Explicación

Stem cells to become new cells, which then become .
The process by which a cell becomes specialised for its job is called .
Stem cells are able to divide to produce more cells, i.e. they can themselves.
In animals, stem cells are used to damaged cells.

mesophyll cells do most of .
They contain many so absorb lots of sunlight.
They have walls – so CO2 can easily diffuse into the cell.

❌ cells are found in ❌ with gap between them to form ❌.
These are tiny pores in surface of leaf for ❌ exchange.
In light, guard cells take up water and become ❌ (swollen).
Thin outer walls and thickened inner walls force them to bend outwards, ❌ stomata.
Allows gas exchange for ❌.