Endocrine System Quiz

Which of the following glands secrete chemical signals directly into the blood?

• Thyroid gland

• Parathyroid glands

• Thymus

• Adrenal glands

Which system transmits electrical signals and releases neurotransmitters to target tissues?

• Endocrine system

• Nervous system

• Thyroid gland

• Pituitary gland

How do lipid-based hormones act on target cells?

• They bind to receptor proteins in the cytoplasm and nucleus

• They trigger secondary messenger pathways

• They bind to DNA as transcription factors

• They diffuse across the cell membrane and enter cells

What is the function of insulin in the regulation of blood sugar?

• Triggers hunger and reduces liver glycogen

• Increases blood sugar level

• Promotes glucose uptake by body cells

• Stimulates the release of glucagon

Which gland is responsible for the regulation of blood calcium levels?

• Thyroid gland

• Parathyroid gland

• Adrenal gland

• Pituitary gland