At the Blood Donation Facility, You Are Completing an Information

question 22

Multiple Choice

At the blood donation facility, you are completing an information form.The form asks about your health history and includes a question about whether you have ever had malaria or visited a country where malaria is endemic.Why is this information relevant?

• A)If you are infected with malaria, you are probably also infected with HIV, and that would disqualify your donation.
• B)Recipients differ in their susceptibility to malaria; if you have had malaria, the staff will earmark your blood to specific kinds of recipients.
• C)This is just one of many pathogens that blood is screened for.The information given by the donor saves the staff time in testing the blood.
• D) Malarial parasites can persist in the liver, and, as a result, could be contaminating your blood and transferred to a recipient.

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Definitions:

Action Potential

A sudden, temporary reversal of the electrical charge across a neuron's plasma membrane, allowing neurons to transmit signals over long distances within the body.

Axon Hillock

The axon hillock is the part of a neuron that connects the cell body to the axon, playing a crucial role in the initiation of nerve impulses.

Magnitude

Magnitude typically refers to the size, extent, or dimension of an object or phenomenon, often quantified in terms of numerical values in various scientific fields.

Threshold Potential

Voltage on a neural membrane at which an action potential is triggered by the opening of sodium and potassium voltage-activated channels; about –50 mV relative to extracellular surround. Also called threshold limit.