Discuss the role of calcium ions in the transmission of an action potential at the synapse

What will be an ideal response?


An action potential reaching the axon terminal triggers voltage-gated calcium ion channels to open. The presence of calcium ions in the axon terminal causes synaptic vesicles to release neurotransmitters into the synaptic cleft. Neurotransmitters bind to receptors on the postsynaptic neuron. Ion channels respond and a local potential is created.

Anatomy & Physiology

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Which of the following is located in the cytoplasm?

A) DNA B) centriole C) chromatin D) envelope E) nucleolus

Anatomy & Physiology

After about 10 weeks of development, hair follicles begin to appear as pockets of cells, called hair ________.

Fill in the blank(s) with the appropriate word(s).

Anatomy & Physiology

Fibers that connect areas of the cerebral cortex within the same hemisphere are

A) projection fibers. B) commissural fibers. C) association fibers. D) all of the above.

Anatomy & Physiology

Transport of materials through an epithelial cell is called ________.

A. bulk transport B. paracellular transport C. transcellular transport D. exocytosis

Anatomy & Physiology