Ordinarily, It Is Not Possible to Transplant Tissues from One

question 106

Multiple Choice

Ordinarily, it is not possible to transplant tissues from one person to another, yet corneas can be transplanted without tissue rejection. This is because the cornea ________.

• A) has no blood supply
• B) is not a living tissue
• C) has no nerve supply
• D) does not contain connective tissue

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Definitions:

Refractory Threshold

The refractory threshold is the period following an action potential during which a neuron is incapable of firing another action potential or the threshold is significantly increased.

Difference Threshold

The smallest detectable difference between two stimuli that a person can sense at least half the time.

Just Noticeable Difference

The smallest difference in stimulation that can be reliably detected by an organism.

Absolute Threshold

The minimum intensity of a stimulus that is required for it to be detected by the senses at least 50% of the time.