Severe Combined Immunodeficiencies (SCIDs) Are Due to

question 11

Multiple Choice

Severe combined immunodeficiencies (SCIDs) are due to

• A)autoantibodies.
• B)failure of B-cell development and maturity.
• C)congenital absence or immaturity of the thymus gland.
• D)delayed hypersensitivity.
• E)a genetic defect in the development of both T cells and B cells.

---

Definitions:

Delta Waves

Slow brain waves primarily associated with deep sleep and brain pathology.

Sleep Spindles

Bursts of oscillatory brain activity visible on an EEG that occur during stage 2 of sleep, thought to play a role in learning and memory.

Alpha Waves

Brain waves that indicate a state of relaxation or light meditation, typically with a frequency of 8 to 12 hertz.

REMs

Rapid Eye Movements, a phase of sleep characterized by quick movements of the eyes, associated with dreaming and increased brain activity.