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Endocrine System Functions Quiz

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Questions and Answers

What is the function of hormones produced by endocrine glands?

Promote hair growth

Enhance vision

Activate muscle contraction and relaxation (correct)

Increase blood pressure

Which type of glands do not have ducts for secretion?

Mixed glands

Endocrine glands (correct)

Exocrine glands

Sweat glands

How do hormones from endocrine glands reach their target organs?

By direct contact with the skin

Through secretory ducts

By diffusion into the blood (correct)

Through lymphatic vessels

Which type of gland secretes substances directly to a specific compartment or surface?

Exocrine glands Signup and view all the answers

What is the main role of the nervous system in relation to exocrine glands?

Controlling glandular secretions Signup and view all the answers

How do endocrine glands differ from exocrine glands?

Endocrine glands secrete directly into blood while exocrine secrete to a surface. Signup and view all the answers

Which term describes glands that serve both endocrine and exocrine functions?

Mixed glands Signup and view all the answers

What is the significance of a hormone's half-life?

Indicates the duration of the hormone's effect in the body Signup and view all the answers

What characterizes steroid-derived hormones in terms of solubility?

Insoluble in blood plasma Signup and view all the answers

How do amine and peptide hormones differ from steroid hormones?

They are synthesized from amino acids Signup and view all the answers

In what way do prostaglandins differ from other hormones mentioned?

They are not found in the plasma membrane Signup and view all the answers

How do hormones predominantly circulate in the blood to affect target cells?

Through a second messenger system Signup and view all the answers

What is the primary factor determining a target cell's response to a hormone?

Number of receptors for the hormone on the target cell Signup and view all the answers

How do fat-soluble steroid hormones primarily enter target cells?

By diffusion through the plasma membrane Signup and view all the answers

In what way can a hormone increase enzyme activity by altering the enzyme's shape and function?

By allosteric modulation of the enzyme Signup and view all the answers

Which factor plays a crucial role in determining the extent of activation of a target cell by a hormone?

The strength of the union between hormone and receptor Signup and view all the answers

Where do hormone receptors mainly exist in target cells?

On the plasma membrane Signup and view all the answers