Responding to Change Random Retrieval

Which of the following is a feature of fast twitch muscle fibres when compared to slow twitch.

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?

Name the molecule that carries out the function : Attaches to the Z line at the end of the sarcomere.

Which protein blocks the actin-myosin binding site in a relaxed myofibril?

Layer B is the layer which contains the photoreceptor cells. What is it's name ? ( Type your answer).

What type of sodium channels are opened when a Pacinian corpuscle is stimulated?

What term is used to describe when more than one presynaptic neurone releases its neurotransmitter onto single post-synaptic neurone? ( Type your answer carefully)

On the diagram, which type of ion will D allow through when opened on an excitatory synapse?

What is the main function of the fatty substance wrapped around peripheral nerve axons?

In the above diagram, which graph shows the correct effects of increasing a stimulus?

Name stage 5 on the above diagram ( spell it carefully!)

Stimulation ( either by a generator potential in a receptor cell or a neurotransmitter binding to a receptor on a postsynaptic membrane) caused which type of channel to open?

The plasma membrane of a neurone at rest is most permeable to which ions via facilitated diffusion?

Which word best describes the charge distribution across a resting axon plasma membrane?

How can charged ions cross a plasma membrane?

• a) Simple Diffusion
• b) Facilitated Diffusion
• c) Active Transport

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

In root tips growing parallel to the soil, where will the highest concentration of IAA be found ?

What effect does high concentrations of IAA have on shoot tip tissue?

What is a growth response to light called?

What word describes the growth response of a plant to a stimulus?