Endocrine System: Mechanisms of Hormones & Target Cells

Front

Which of these is NOT a way in which hormones affect target cells?

• changing the color of the cell
• Alter plasma membrane permeability of membrane potential by opening or closing ion channels
• Induce secretory activity
• Activate or deactivate enzyme systems

Back

changing the color of the cell

Front

Function of hormones in the body? Options: Regulating metabolism, Changing the DNA sequence, Producing red blood cells, Generating nerve impulses

Back

Regulating metabolism

Front

What is a common effect of hormones on target cells?

Back

Altering gene expression

Front

What term describes the process of a hormone causing target cells to form more receptors?

Back

Up regulation

Front

Which factor does NOT affect target cell activation? Options: pH levels of hormone, Blood levels of the hormone, relative number of receptors on target cell, affinity of binding between receptor and hormone

Back

pH levels of hormone

Front

How are hormones typically removed from the blood?

Back

Metabolism by the liver and excretion by the kidneys

Front

What is the half-life of a hormone?

Back

The time required for a hormone’s blood level to decrease by half

Front

How are blood levels of hormones typically controlled?

Back

Negative feedback mechanism

Front

What disease is an example of down regulation? Options: Alzheimer's Disease, Type 2 Diabetes, Asthma, Hypertension

Back

Type 2 Diabetes

Front

What role do degrading enzymes play in hormone action?

Back

Degrading enzymes break down hormones after they have carried out their function.