Multiple choice

Which of the following type of cell signalling occurs when cells secrete signaling molecules into the blood?

  1. Paracrine signal

  2. Autocrine signal

  3. Endocrine signal

  4. Synaptic signal

Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Endocrine signals are called hormones. Hormones are produced by endocrine cells and they travel through the blood to reach all parts of the body.