Responding to Change Random Retrieval

One role of ATP in muscle contraction is to provide the energy required for the 'powerstroke' of the myosin head. What is the other use of ATP in muscle contraction?

Breaks down ATP on myosin head

In the sliding filament theory, what causes the actin-myosin binding site to be exposed?

In the above image, name the unit represented by B.

When the layers of connective tissue are pressed, what happens to the neurone membrane?

Name part B on the above diagram (type your answer).

If the concentration of neurotransmitter secreted is very low, then threshold may not be reached. What term describes the process of increasing neurotransmitter release? either by multiple presynaptic neurones forming a single synapse or increasing the frequency of neurotransmitter release. Type your answer

Using the diagram, name E

True or False - Axons with a narrower diameter have a faster speed of conduction.

What the the tiny gaps called labelled X on the above diagram? ( Type your answer)

After an action potential has fired, the refractory period acts as the following:

• a) Prevents action potentials overlapping
• b) Limit the frequency of action potentials
• c) Limit the size of action potentials
• d) Makes action potentials travel unidirectionally.

Put the above events ( A-F) in order for the passage an action potential.

What ion is moving during process '3' on the above diagram?

What do we call the process happening at '3' on the above diagram?

In the above experiment on woodlice, what is the Independent variable?

True or False : Taxis is only ever away from a stimulus

What is the definition of a stimulus?

Which of these statements about Went's experiment is NOT true?

What does Darwin's experiment where he placed a black cover over the tip show?

What affect does IAA have on shoot tips?