Body Systems

Question 1

How is life demonstrated? (MRS GREN)

Answer 1

Movement, Respiration, Sensitivity, Growth, Reproduction, Excretion, Nutrition.

Question 2

What is an endothermic animal?

Answer 2

An endothermic animal is a warm blooded animal that needs a lot of food to stay warm.

Question 3

What is an exothermic animal?

Answer 3

An exothermic animal is a cold blooded animal that metabolise (process food) at the temperature of the environment and require little food to stay alive.

Question 4

What happens to the Sa:V ratio as the cell increases in size?

Answer 4

It Decreases

Question 5

Why is there a limit on cell size?

Answer 5

Because if it gets to big it can’t supply its nutrients.

Question 6

What is diffusion?

Answer 6

Diffusion is the movement of molecules from areas of high concentration to low concentration in a free state.

Question 7

What is osmosis?

Answer 7

Osmosis is the diffusion of water across a semi permeable membrane from an area of high water concentration to low water concentration.

Question 8

Why can’t salt undergo osmosis?

Answer 8

Because it can’t fit though a semi permeable membrane.

Question 9

What is the role of the Digestive System?

Answer 9

Ingests and breaks down food so that can be absorbed by the body. (Provides Nutrients)

Question 10

What is the role of the Urinary System?

Answer 10

Eliminates waste liquid wastes and maintains water balance.

Question 11

What is the role of the Respiratory System?

Answer 11

To supply oxygen, eliminate carbon dioxide and supply blood with oxygen.

Question 12

What is the role of the Skeletal System?

Answer 12

Provides mechanical support for the body and produces red blood cells.

Question 13

What is the role of the Muscular System?

Answer 13

Enables movement, posture and balance.

Question 14

What is the role of the Integumentary System?

Answer 14

Protects body from environment, injury and infection. (Hair, Nails, Skin)

Question 15

What is the role of the Cardiovascular System?

Answer 15

Enables the transport of nutrients, gases, nutrients hormones to and from cells of the body.

Question 16

What is the role of the Endocrine System?

Answer 16

Secretes Hormones into bloodstreams for regulation of body activities.

Question 17

What is the role of Nervous System?

Answer 17

It is Responsible for the control of the body and communication among its parts.

Question 18

What is the role of Lymphatic System?

Answer 18

Protects against infections.

Question 19

What is homeostasis?

Answer 19

Homeostasis is the maintenance of organisms internal conditions to remain healthy and functioning regardless of external conditions. E.g The maintenance of a steady body temperature in warm blooded animals is an example of Homeostasis.

Question 20

Where do muscles receive their energy?

Answer 20

Adenosine Trisphosphate or ATP

Question 21

What are the 3 layers of skin?

Answer 21

The Epidermis, Dermis and Subcutaneous Layer.

Question 22

What are the components of a Neuron?

Answer 22

Dendrites, Axon, Axon Terminal, Cell Body, nucleus and myelin Sheath.

Question 23

What is the direction of blood flow in humans?

Answer 23

Heart- Lungs- Heart-Leg-Heart

Question 24

How could you best describe a hormone?

Answer 24

A chemical message that brings about a message

Question 25

What limits the size of a cell?

Answer 25

The Surface Area to Volume ratio because the surface area grows slower than the volume, therefore making It hard for nutrients to quickly enter the cell.

Question 26

What 2 body systems do we need for homeostasis?

Answer 26

Nervous and Endocrine System

Question 27

What do hormones do?

Answer 27

They regulate mood, impact growth and development, sexual function, etc...

Question 28

What does myelin sheath do within a neuron?

Answer 28

The myelin sheath allows electrical impulses to transmit quickly and efficiently along the nerve cells. It also protects the nerves from other electrical impulses.

Question 29

What is a synapse and what does it do?

Answer 29

a synapse is a structure that permits a neuron (or nerve cell) to pass an electrical or chemical signal to another neuron

Question 30

What does the Frontal Lobe do in the brain?

Answer 30

Controls Attenion, Planning and decision making.

Question 31

What does the Motor Cortex do in the brain?

Answer 31

Controls Movement

Question 32

What dos the Parietal Lobe do in the brain?

Answer 32

Interpret sensory information

Question 33

What does the occipital lobe do in the brain?

Answer 33

Controls Vision

Question 34

What does the Cerebellum do in the Brain?

Answer 34

Coordinates muscle movement

Question 35

What does the Temporal Lobe do in the Brain?

Answer 35

Controls Memory

Question 36

What do the arteries do?

Answer 36

The Arteries carry oxygenated blood away from the heart, to the brain and are RED.

Question 37

What do veins do?

Answer 37

Veins carry deoxygenated blood to the heart.