Reflexes

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what are reflexes? 
rapid, automatic responses to stimuli
What is a reflex? 
where the body responds to a stimulus without making a conscious decision to respond
why does info travel really fast from receptors to effectors? 
Because you do NOT have to spend time deciding how to respond
why do simple reflexes help organisms to protect the body?
they are rapid
What is a reflex arc?
the pathway of neurones linking receptors to effectors in a reflex
Give example of a simple REFLEX ARC- the hand-withdrawal response to heat?
thermoreceptors in skin detect heat stimulus
sensory neurone carries impulses to relay neurone
Relay neurone connects to the motor neurone
motor neurone sends impulses to effector (biceps muscle)
muscle contracts to withdraw hand & stop it being damaged
What is possible if there is a relay neurone involved in the simple reflex?
It is possible to override the reflex eg brain could tell hand to withstand the heat

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Reflexes

Cards (7)

5.2.2 Reflex Actions

8.5 Community Ecology

8.3 Population Ecology

6.1.3 The Reflex Arc

6.1.2 Effectors

1.2.3 Stem Cells

1.1.5 Microscopy

1.1.3 Cell Specialization

1.3.2 Osmosis

1.1.4 Cell Differentiation

1.3.2 Osmosis

1.1.1 Eukaryotic and Prokaryotic Cells

1.1.2 Animal and Plant Cells

1.1.1 Cell Structure

1.2.2 Mitosis and the Cell Cycle

1.3.3 Active Transport

2.1.1 Eukaryotic cells

2.5.2 Transport mechanisms

5.1 Meiosis

8.6 Biodiversity

8.7 Disruptions to Ecosystems