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Human Body Alice College > LO1 > Flashcards

LO1 Flashcards

1
Q

Levels of structure in body

A

Atoms
Molecules, Cells
Tissue
Organs
Organ systems
Organisms

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2
Q

Where is extra/intra fluid
Example

A

Intra=in cell- interstution fluid or cytoplasm
Extra=out cell- plasma

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3
Q

Semi permeable membrane made from?

A

Phospholipid

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4
Q

4 functions of water in body

A

•cooling
•lubricants/moisten
•transport nutrients
•shock absorption
•digestion
•PH
•fluid levels (osmoregulation)

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5
Q

Sensible losses

A

Urine/waste. Can be measured

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6
Q

Insensible losses

A

Vapour from lungs due to humidity
Sweating

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7
Q

Litres in male plus %

A

42L + 60%

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8
Q

Fluid loss in elderly is serious,why?

A

Hold less water in body
Can’t feel the need to drink much

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9
Q

Diffusion is what?
What type of transport?

A

•movement of concentration from low to high in a cell
•Passive transport no energy used

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10
Q

Diffusion is what?
What type of transport?

A

•Equalises concentration from high to low in a cell
•Passive transport no energy used

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11
Q

What is osmosis?
What type of process

A

•Diffusion of water-solution of low concentration to a solution of high concentration through a semi-permeable membrane
•Passive no energy used

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12
Q

Osmotic pressure is?

A

Movement of water to where needed.

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13
Q

What is an osmoreceptor

A

Detects balance of water (change in osmotic pressure)

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14
Q

Osmosis in a solution
What concentration of water is in a high concentration of a solution

A

High concentration of the solute means low water and viceversa

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15
Q

What is filtration
What type of energy

A

Passage of water solution through a membrane
Passive

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16
Q

What is active transport?
What type energy needed+how+where made?

A

•It is the movement of a low concentration to a high
•From a sodium potassium pump
•Requires ATP made in mitochondria

17
Q

Type of energy body uses

A

ATP

18
Q

What is homeostasis?

A

Keeping internal conditions constant

19
Q

What does Homeostasis keep constant?
Examples

A

•Body temp
•water concentration
•PH levels
•CO2+O2 levels in blood

20
Q

2 main body systems Homeostasis controls

A

Nervous system (body’s functions)
Endocrine (release of hormones)

21
Q

Process for water balancing

A

•OSMORECEPTORS see change in OSMOTIC PRESSURE
•HYPOTHALAMUS activates PITUITARY GLAND to realise ADH
•KIDNEYS increase REABSORPTION of WATER to BLOOD VESSELS
•stops when OSMOTIC PRESSURE balances then ADH is stopped

22
Q

Example of positive feedback?

A

Release of oxytocin in child birth

Human Body Alice College (3 decks)

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