Physiology Flashcards

1
Q

What is the process of cells maintaining a stable internal environment called?

A

Homeostasis

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2
Q

What is autocrine action?

A

Communication within the same cell

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3
Q

What is Paracrine action?

A

Communication with a neighbouring cell

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4
Q

What in endocrine action?

A

Communication with distant cells

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5
Q

What does synergenistic mean?

A

Working together

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6
Q

What does antagonistic mean?

A

Working against each other

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7
Q

What are the 3 types of extracellular body fluids?

A

Plasma, Interstitial, Transcellular

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8
Q

Give an example of a Transcellular body fluid

A

Cerebrospinal fluid, Synovial fluid, Urine, Sweat, Tears

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9
Q

Give an example of an Interstitial Body fluid?

A

Lymph, Fluid between cells

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10
Q

What is an intracellular body fluid

A

Fluid within a cell

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11
Q

Why is blood not a fluid?

A

Blood cells do not dissolve, instead, the relevant fluid is the plasma found in blood

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12
Q

What is oncotic pressure?

A

Pressure exterted by Proteins

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13
Q

Define Hypertension

A

High Blood Pressure

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14
Q

What does Isotonic mean?

A

Same tonicity / pressure

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15
Q

What does the term kalemia relate to

A

Potassium concentrations

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16
Q

What does the term natremia relate to?

A

Sodium concentrations

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17
Q

What causes a Bilayer to be formed

A

The hydrophobic effect

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18
Q

Give an example of a monolayer found in the body

A

Micelle

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19
Q

What are the membranes that make up the exterior edges of animal cells called

A

Ampiphatic Phospholipids

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20
Q

Define cytosolic

A

A semi fluid substance filling the interior of the cell

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21
Q

Define exoplasmic

A

Facing away from the cytoplasm

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22
Q

Where is cardiolipin found?

A

Mitochondria

23
Q

Where are glycolipids found?

A

The outside of the cell

24
Q

What are sphingolipids?

A

Lipids with sphingosine instead of glycerol as the backbone

25
Where are sphingolipids found?
The myelin sheath that surrounds axons in neurons
26
How does secondary active transport work?
Molecules are moved as a result of the diffusion of another substance
27
What is the main job of NA+
Determines Plasma Osmolality
28
What is the main job of K+
Determines Membrane Potential
29
What is the main job of CA2+?
Major cell signalling
30
What is the main job of H+
Determines Ph
31
What is the main job in HCO3-
Buffer/Acid base regulator
32
What is the main job of Cl—
It is a major anion important in acid base and cell volume
33
What is a channelopathy
A genetic disorder resulting in defects in ion channels
34
What is vesicular transport
A form of active transport for larger molecules
35
What is Endocytosis?
Entering the cell
36
What does exocytosis mean?
Leaving the cell
37
Define Spatial summation
When inputs from different locatitons add together at once
38
Define Temporal summation
When inputs from the same location add together over time
39
What is an Inhibitory post synaptic potential?
A small hyperpolarisation making an action potenital less likely
40
What is an excitatory post synaptic potential
A small depolarisation which makes an action potential more likely
41
What causes hyperpolarisation?
More K+ channels open than during repolarisation causing K+ to get nearer to equilibrium
42
What causes Repolarisation?
NA+ influx stops and there is an efflux of K+ through voltage gated K+ channels
43
What causes Depolarisation?
Influx of NA+ through voltage gated NA+ channels
44
What is the body of this cell called?
Soma
45
What are the ends of this cell called?
Dendrites
46
What is the blue part of this diagram showing?
Axon Hillock
47
What does Point 5 show?
Hyperpolarisation (EK+ = -90mV)
48
What does Point 4 show?
Repolarisation
49
What does Point 3 show?
Peak of the curve (ENA+ = +65mV)
50
What does Point 2 show?
Overshoot of the threshold
51
What does Point 1 show?
Depolarisation
52
What does Point 0 show?
Resting Membrane Potential
53
What causes Chemical cell to cell communication
Chemicals acting on target cells through receptors
54
What causes Electrical cell to cell communication?
Changes in resting potentials along cell membranes