Which of these transports materials in both directions.
a. slow axonal transport
b. fast axonal transport

Fast axonal transport

Explanation:

Axonal transport can be defined as the cellular process which controls the movement of mitochondria, proteins, synaptic vesicles, lipids and other parts from and to neuron's cell body through the cytoplasm of its axon.

This is done because some of the neurons are meters long and cannot transport the products from the nucleus to the axon by the process of diffusion so axonal transport is required in this case.

In case of fast axonal transport the movement of the substances takes place in both the directions that is from the axon to nucleus and from the nucleus to axon (retrograde and anterograde)

Shortly thereafter, radiolabeling and histochemical studies demonstrated that faster rates of transport occur [5]. Unlike slow transport, the faster components move material bidirectionally, toward and away from the cell body. Both endogenous proteins and exogenously applied labels were detected moving at fast transport rates. These findings expanded the concept of axonal transport: materials move in both anterograde and retrograde directions and rates vary by as much as three orders of magnitude

auricle

explanation:

the flaps on the front of the atria are called the auricle.

answer:

im am not sure what you are asking. could you rephrase the question?