Homeostasis Flashcards

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1
Q

At relay …

A

Synapse + neurotransmitters + diffuse

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2
Q

Detached retina =

A

Blindness + no connection to optic nerve

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3
Q

Lens/cornea + Sclera…

A

Focuses light onto retine + white tough outer layer of eye

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4
Q

Osmoregulation is…

A

Controlling conc of blood

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5
Q

Sensory arc

A
Receptor 
SN
Synapse
RN/CNS
MN
Effector
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6
Q

In bright light…

A

Circular muscles contract + radial muscles relax (pupils constrict//less light in)

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7
Q

in dim light…

A

Circular muscles relax + radial muscles contract (pupil dilate// more light in)

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8
Q

Far away accommodation..

A

Ciliary muscles contract + suspensory ligaments loosen (more convex)

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9
Q

Near accommodation

A

Ciliary muscles relax + Suspensory ligaments tighten (less convex)

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10
Q

Vasoconstriction

A

BV constrict + less blood flow to skin capillaries + less heat loss// for vital organs
- sweat glands = less sweat released + less cooling

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11
Q

Vasodilation

A

BV dilates + more blood flow to capillaries + more heat loss + sweating//enzymes

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12
Q

Shivering + goosebumps

A

increase KE + rapid muscle contraction

erector hair muscles contract + trap air + insulation + prevent heat loss

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13
Q

Neurons vs hormones

A
  1. Electrical vs chemical
  2. Fast/short vs slow/long
  3. Neurones vs blood/plasma
  4. Specific vs general
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14
Q

Structure of neuron

A
  • Cell body = nucleus + cell m + ribosomes

- Axon = myelin sheath + nerve endings

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15
Q

Adrenaline

A
  • Increases HR + BR
  • more oxygen/blood/energy to muscles
  • Dilates pupils
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16
Q

Testosterone

A

Produced by testes + SSC - sperm production/pubic hair/increase of teste size

17
Q

Oestrogen

A

Produced by the ovaries + SSC - menstruation/breast develop/hips widen

18
Q

Insulin

A
  • Pancreas releases insulin

- Stores glucose as glycogen in liver

19
Q

quadrat practical

A
  • quadrat
  • repeat
  • random coordinates
  • count zpecies
  • multiply for total area