Which of the Following Is NOT a Characteristic of a Vein

question 27

Multiple Choice

Which of the following is NOT a characteristic of a vein that differentiates it from an artery?

• A)Veins have thinner walls.
• B)Veins have valves.
• C)Veins have a smaller lumen.
• D)Veins carry blood toward the heart.

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Definitions:

Postsynaptic Neuron

The neuron that receives a signal (neurotransmitter) across the synaptic gap from a presynaptic neuron.

Presynaptic Neuron

A neuron that releases neurotransmitters from its axon terminal into the synaptic cleft to transmit a signal to the receiving (postsynaptic) neuron.

Cleanup Enzymes

Biological molecules that break down or remove unwanted or toxic substances within an organism.

Antagonist

A substance that acts against and blocks an action in pharmacology, or a character in opposition to the protagonist in literature.