Unit 4.1-4.5

Front

What is transduction in cellular signaling?

Back

Transduction is the process by which a signal is converted into a form that can bring about a cellular response, often involving a series of molecular events.

Tags

NGSS.HS-LS2-3

Front

What type of macromolecule are receptor molecules?

Back

Receptor molecules are proteins that bind to specific ligands, such as hormones or neurotransmitters, to initiate a cellular response.

Front

What is a positive feedback loop?

Back

A positive feedback loop is a process in which the output of a system enhances or amplifies the initial stimulus, leading to an increased response.

Front

What is a negative feedback loop?

Back

A negative feedback loop is a process in which the output of a system reduces or counteracts the initial stimulus, helping to maintain homeostasis.

Tags

NGSS.HS-LS1-3

Front

What do protein kinases do?

Back

Protein kinases are enzymes that add phosphate groups to other molecules, typically proteins, which can activate or deactivate their function.

Front

What is the role of insulin in blood sugar regulation?

Back

Insulin is a hormone released by the pancreas that helps lower blood sugar levels by facilitating the uptake of glucose into cells.

Tags

NGSS.HS-LS1-3

Front

What is the significance of cAMP in cellular signaling?

Back

cAMP (cyclic adenosine monophosphate) is a secondary messenger that transmits signals from hormones and other signaling molecules to target proteins within the cell.

Front

What is the function of transport vesicles in cellular communication?

Back

Transport vesicles carry neurotransmitters and other signaling molecules to neighboring cells, facilitating communication between them.

Front

How do enzymes contribute to signal transduction?

Back

Enzymes can pass phosphate groups down a series of proteins, which can activate or deactivate signaling pathways in response to a signal.

Front

What is the role of platelets in the clotting cascade?

Back

Platelets aggregate at the site of a wound and release chemicals that attract more platelets, promoting rapid clot formation.