MEDIUM
AS and A Level
IMPORTANT
Earn 100
Explain why steroid hormones, such as progesterone and oestrogen, can pass easily through the cell surface membrane whereas other hormones cannot.
Important Questions on Control and Coordination
MEDIUM
AS and A Level
IMPORTANT
Insulin, glucagon, and ADH coordinate aspects of homeostasis. Make a table to summarise everything about these three hormones.
EASY
AS and A Level
IMPORTANT
Make a table to compare the structure and function of motor and sensory neurones.
EASY
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IMPORTANT
What is the relationship between an axon, the myelin sheath, and the nodes of Ranvier of a myelinated neurone.
EASY
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IMPORTANT
What are the advantages of neurones being arranged in series as shown in the given image?
MEDIUM
AS and A Level
IMPORTANT
On a graph, draw a horizontal line right across the given figure to represent the resting potential.
EASY
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IMPORTANT
The resting potential is said to be — 70 mV inside (neurone). What does this mean?
MEDIUM
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IMPORTANT
Describe how a neurone maintains resting potential.
MEDIUM
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IMPORTANT
As an action potential begins, the potential difference changes from — 70 mV to +30 mV inside. Why is this called depolarisation?
