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Flashcards in Biology Deck (167)
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1

What do most human and animal cells have

A nucleus
Cytoplasm
A cell membrane
Mitochondria
Ribosomes

2

What is the function of a nucleus

To control the activities of the cell

3

What happens in the cytoplasm

Most chemical reactions take place

4

What is the function of a cell membrane

To control the passage of substances into and out of the cell

5

What is the function of mitochondria

To release energy from respiration

6

What is the function of ribosomes

Protein synthesis

7

What do most plant cells have

A nucleus
Cytoplasm
A cell membrane
Mitochondria
Ribosomes
Chloroplasts
Cell wall
Vacuole

8

What is the function of a cell wall

To strengthen the cell. It is made of cellulose

9

What is the function of chloroplasts

To absorb light energy to make food (through photosynthesis)

10

What is a vacuole filled with

Cell sap

11

What does a bacterial cell consist of

Cytoplasm
Membrane
Cell wall

The genes are not in a distinct nucleus

12

What is yeast

A single-celled organism

13

What does a yeast cell consist of

A nucleus
Cytoplasm
Cell membrane
Cell wall

14

Why might cells be specialised

To carry out a particular function

15

What does diffusion allow

Dissolved substances to move into and out of cells
Oxygen required for respiration to pass through cell membranes

16

What is diffusion

The spreading of the particles of any substance resulting in a net movement from a region where there is a higher concentration to a region with a lower concentration

17

When is the rate of diffusion faster

When the difference in concentration is greater

18

What is a tissue

A group of cells with similar structure and function

19

What are some examples of tissues

Muscular tissue
Glandular tissue
Epithelial tissue

20

What can muscular tissue do

Contract to bring about movement

21

What can glandular tissue do

Produce substances such as enzymes and hormones

22

What can epithelial tissue do

Cover some parts of the body

23

What are organs made of

Tissues. One organ may contain several tissues

24

What does the stomach contain

Muscular tissues - to churn the contents
Glandular tissue - to produce digestive juices
Epithelial tissue - to cover the inside and outside of the stomach

25

What are organ systems

Groups of organs that perform a particular function

26

What is the digestive system

An organ system in which humans and other mammals exchange substances with the environment

27

What does the digestive system include

Glands
The stomach
The liver
The small intestine
The large intestine

28

What do glands do in the digestive systems

Glands, such as the pancreas and salivary glands, produce digestive juice

29

What happens in the stomach and small intestine

Digestion occurs

30

What does the liver do

Produce bile