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Body Systems Sem 2- 2019 > Body Systems > Flashcards

Body Systems Flashcards

1
Q

How is life demonstrated? (MRS GREN)

A

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

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2
Q

What is an endothermic animal?

A

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

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3
Q

What is an exothermic animal?

A

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.

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4
Q

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

A

It Decreases

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5
Q

Why is there a limit on cell size?

A

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

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6
Q

What is diffusion?

A

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

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7
Q

What is osmosis?

A

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

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8
Q

Why can’t salt undergo osmosis?

A

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

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9
Q

What is the role of the Digestive System?

A

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

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10
Q

What is the role of the Urinary System?

A

Eliminates waste liquid wastes and maintains water balance.

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11
Q

What is the role of the Respiratory System?

A

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

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12
Q

What is the role of the Skeletal System?

A

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

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13
Q

What is the role of the Muscular System?

A

Enables movement, posture and balance.

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14
Q

What is the role of the Integumentary System?

A

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

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15
Q

What is the role of the Cardiovascular System?

A

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

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16
Q

What is the role of the Endocrine System?

A

Secretes Hormones into bloodstreams for regulation of body activities.

17
Q

What is the role of Nervous System?

A

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

18
Q

What is the role of Lymphatic System?

A

Protects against infections.

19
Q

What is homeostasis?

A

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.

20
Q

Where do muscles receive their energy?

A

Adenosine Trisphosphate or ATP

21
Q

What are the 3 layers of skin?

A

The Epidermis, Dermis and Subcutaneous Layer.

22
Q

What are the components of a Neuron?

A

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

23
Q

What is the direction of blood flow in humans?

A

Heart- Lungs- Heart-Leg-Heart

24
Q

How could you best describe a hormone?

A

A chemical message that brings about a message

25
Q

What limits the size of a cell?

A

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.

26
Q

What 2 body systems do we need for homeostasis?

A

Nervous and Endocrine System

27
Q

What do hormones do?

A

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

28
Q

What does myelin sheath do within a neuron?

A

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

29
Q

What is a synapse and what does it do?

A

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

30
Q

What does the Frontal Lobe do in the brain?

A

Controls Attenion, Planning and decision making.

31
Q

What does the Motor Cortex do in the brain?

A

Controls Movement

32
Q

What dos the Parietal Lobe do in the brain?

A

Interpret sensory information

33
Q

What does the occipital lobe do in the brain?

A

Controls Vision

34
Q

What does the Cerebellum do in the Brain?

A

Coordinates muscle movement

35
Q

What does the Temporal Lobe do in the Brain?

A

Controls Memory

36
Q

What do the arteries do?

A

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

37
Q

What do veins do?

A

Veins carry deoxygenated blood to the heart.

Body Systems Sem 2- 2019 (2 decks)

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