Which of the Following Is Not True About the Development

question 17

Multiple Choice

Which of the following is not true about the development of the immune system

• A) the basic structure of the immune system is present at birth
• B) the complement system develops completely before birth
• C) IgD lymphocytes gradually disappear
• D) a fully competent immune system may not be in place until early adolesence

---

Definitions:

Interspinales

Muscles located between the spinous processes of the vertebrae, playing a role in stabilizing and extending the spine.

Multifidus

A deep muscle of the back that stabilizes the spine during movement and helps maintain proper posture.

Psoas Minor

A small muscle located in the lower back, which may not be present in all individuals, involved in flexing the lumbar spine.

Flexor Pollicis Brevis

A muscle in the hand that flexes the thumb towards the palm.