Section 2

Question 1

Attributes shared by all organisms

Answer 1

• able to reproduce

- all able to grow and develop using energy

Question 2

Body system

Answer 2

Group of organs that function together as unit

Question 3

Digestive system

Answer 3

Breaks down food and absorb nutrient molecules

Question 4

Body tissue and 4 groups and examples

Answer 4

Coaster together cells with similar structure and function

1. Epithelial tissue
   2 muscle tissue
2. Nerve tissue
3. Connective tissue

Question 5

Epithelial tissue

Answer 5

• act as barrier
• substances are absorbed or secreted

Skin

Question 6

Muscle tissue

3 different types

Answer 6

• build of muscle cell
• contract and relax producing movement

1. Skeletal muscle
2. Cardiac muscle
3. Smooth muscle - hollow walls of organs intestine

Question 7

Nerve tissue

Answer 7

• sending signals to the whole body

- controlling movement

Question 8

Connective tissues

Answer 8

• suggest and bind together cells and structure in the body
• found all over the body
• cartilage, skin, adipose tissue

Question 9

Intestine layers

Answer 9

• epithelium
• connective tissue
• longitudinal smooth muscle layer
• nerve tissues
• circular smooth muscle layer
• connective tissues
• epithelium
• lumen - where the food is moving

Question 10

What plantar skin consist of

Answer 10

Epidermis - constantly worn away, major barker against infection, regulate loss of water

Dermis - connective tissues, sweat glands, hair, follicles, blood vessels nerves

Subcutaneous layer - adipose tissue

Question 11

Consistency of muscle

Answer 11

Cell nucleii
Striations
Adipose tissue

Question 12

Cerebellum consistency

Answer 12

Nerve cells - contains organelle called cell nucleus

The outer pink region contain in,y few cells. Connect neurones together forming communication network

Question 13

Lung tissues

Answer 13

Small blood vessels

Epithelial cells

Question 14

Metabolism

Answer 14

Chemical process going on in the organism to sustain life

Question 15

Cytosol

Answer 15

Gel like liquid - cytoplasm = mitochondria, ribosomes, cytosol

Question 16

What happens in ribosome

Answer 16

Protein synthesis take place

Question 17

What happens in mitochondrion

Answer 17

Organelle where energy from nutrient is converted into usable form that drives processes in the cell

Question 18

Endoplasmic reticulum

Answer 18

• rough edoplastic reticulum— part with ribosomes
  
  • sort protein and ensure they are transmitted in the correct part
• smooth endoplasmic reticulum - part with no ribosomes
  * involved in production and processing fat

Question 19

Cell membrane

Answer 19

• composed of fat and protein
• gases can move freely across
  other molecules like sugar and protein can only cross via special channels

Question 20

Nucleus

Answer 20

• contain DNA
  -carries info necessary for the cell to synthesise protein
• DNA connected to protein = chromosomes
  46 chromosomes = 23 matching pairs from dad and mum

Question 21

Nuclear membrane

Answer 21

• surrounds nucleus

- many small pores and holes that allow substances movement between nucleus + cytoplasm

Question 22

Stem cell

Answer 22

Retain the ability to divide and replace old or damaged cells. Present in most tissues of multicellular organism

Question 23

How much water is in the body

Answer 23

65%

Question 24

Roles of water in human body

Answer 24

1. Solvent in which chemical reaction take place
2. Transport dissolved substances in the blood
3. Lubricates the muscle and joints
4. Help food move through guts
5. Regulate body temperature

Question 25

Molecules containing carbon - name

Answer 25

Organic molecules

Question 26

Molecules that do not contain carbon atom

Answer 26

Inorganic molecules