Intracellular receptors are important for large polar ligands.

Protein kinase A is activated by ____, while protein kinase B is activated by ____, and protein kinase C is activated by ____.

The insulin signaling pathway is dependent on enzyme linked receptors, which causes a cascade that has _____ and _____, as a response.

Enzyme-linked receptors are transmembrane proteins, they have binding sites that are specific for certain enzymes as ligands.

____ is a key to the $$Ca^+$$ channels, while ____ is responsible of kinase C activation, both of them are derived from the splitting of ____, which is a phospholipid in cell membrane.

Protein kinase A

ATP can work as a substrate for the enzyme ______ producing cAMP which works as a second messenger.

Ligand gated channels are found in the plasma membrane as well as some intracellular membranes.

Which of these is considered hydrophilic signaling molecules?

Steroid hormones regulate gene expression by hydrophilic signaling.

The contraction of muscles due to the excitation from a neurotransmitter is an example of _____ for a response.

Nitric oxide is secreted by endocrine glands to relax smooth muscles in blood vessels.

Prostaglandin H2, which plays a role in regulation of pain is a type of _____.

Cytokines are signaling molecules that are important in the communication of ______.

Cell junctions and temporary contact are both examples of direct cell communication.

Receptors for signal molecules __________.

GPCR are made up of multiple subunits besides the seven membrane spanning region?

Epinephrine is a protein hormone found in many animals. Epinephrine stimulates a signaling pathway that results in the breakdown of glycogen to glucose in the liver cells. Which of the following describes the initial steps in the process whereby epinephrine stimulates glycogen breakdown?

In response to a signal begin received a cell may ________.

Signalling from local mediator cell to targets in close proximity is an example of which kind of signalling?

The speed of a response to an extracellular signal depends apon.....

In the signal transduction pathway the signal is passed though the cytoplasm via....

GTP proteins switch between active state (GDP bound) and inactive state (GTP bound)

Cyclic AMP is synthesised by adenyl cyclase and degraded by ......

RTKs are an example of enzyme coupled receptor but what does it stand for?

During PI3-AKT pathway, activated AKT promotes what?

Different signals originating from the plasma membrane can be integrated by cross talk between different signalling pathways inside the cell.

Signalling molecules fall into 2 classes based on what?

What hormone prolongs and intensifies the body's response during stress by increasing heart rate and raising blood glucose?

What hormone is "the boss" (takes over) during fight or flight?

Define Fight or Flight Response:

What is being depicted in the image?

Which letter represents the ligand?

Which letter represents the cell surface receptor protein?

Which letter represents the cell membrane?

This is an example of

What is the importance of diacylglycerol (DAG)?

What type of secondary messengers is formed from a specialized membrane lipid inositolphospholipid by the enzyme phospholipase C?

What cellular mechanism responds to its own signal of the cell (the cell produces a signaling molecule and at that time carries on its surface the receptors necessary for respond of the secreted ligand)?

What is the importance of inositoltriphosphate (IP3)?

******************** signaling

A Ca2+-dependent protein kinase that is activated by diacylglycerol.

Enzyme that phosphorylates target proteins in response to a rise in intracellular cyclic AMP.

Small signal molecule secreted by the presynaptic nerve cell at a chemical synapse to relay the signal to the postsynaptic cell.

Enzyme that transfers the terminal phosphate group of ATP to a specific amino acid of a target protein.

Molecule from outside the cell that communicates the behavior or actions of other cells in the environment and elicits an appropriate response.

Small molecule that is formed in the cytosol, or released into it, in response to an extracellular signal and that helps to relay the signal to the interior of the cell.

A signal relay chain involving multiple protein kinases, each of which is activated by phosphorylation and then phosphorylates the next protein kinase in the sequence.

Short-range cell–cell communication via secreted local mediators that act on adjacent cells.

General term for a protein that binds a specific extracellular molecule (ligand) and initiates a response in the cell.

This is not second messenger

Second messenger

Type of signaling

Phosphorylation is the process by which a ____ is added to a protein to activate it.

What is the purpose of transduction?

What is the role of protein kinase in a signal transduction pathway?

Which step would be the first step in a signal transduction pathway?

The cAMP/PKA signal transduction pathway is used in cells is an example of ______.

The target enzyme for Gq proteins is ____________.

G-protein coupled receptors (GPCRs) have _______ transmembrane domains and are associated with an intracellular G-protein

The MAP Kinase signaling cascade begins the ___________.

Growth factors or mitogens stimulate RTKs to promote cell division and it is facilitated by the _________________.

______________cell-surface receptors with intracellular domains that have intrinsic enzymatic activity.

G proteins are inactivated by ________ activity of alpha subunit.

G-proteins are classified as ________________,

When a __________ reaches its __________ , there is a specific means of receiving it and acting on the message. This task is the responsibility of specialized proteins called __________ .

Which of the following plasma membrane receptors activate signaling pathways usually by forming molecular dimers that result in protein phosphorylation reactions upon binding of their specific ligand?

Which receptor family is penetrated through the membrane and has intrinsic enzymatic activity?

The differeance between serine /threonine and tryosine kinases is the fact that tyrosine kinases must dimerize while serine/threonine kinases do not have to dimerize.

Which of the following is a role of cytokines. Select all that apply.

With a growth factor named NGF, which of the following would most likely be its role in the body?

The tyrosine phosphotases are divided into two major classes: the receptor class and the nontransmembrane class.

Phosphotases act generally and can remove phosphate groups off of any phosphorylated protein.

GPCR are made up of multiple subunits besides the seven membrane spanning region?

When the ligand binds to it specific G-protein coupled receptor, it always only leads to upregulation as the final target protein?

Which chemical molecule below would be a common theme amongst the signaling pathways to turn on or off a protein?

Which item listed below is not involved in some way in signal transduction for the cell?

Membrane receptors can be classified into different families based on their structures, their kinase activity, and the ligand they bind to.

Nuclear receptors are linear receptors that bind directly to DNA in a ___________ fashion. The DNA sequence that recognizes these receptors are called ___________.

A cell has a mutation which causes unregulated growth of the cell, what are possible locations for the mutation listed below? Select all that apply.

PKC is a member of the tyrosine kinase family

Which of these is necessary for the activation of PKC? Select all that apply.

Once GTP replaces GDP, the alpha subunit always goes on to activate succeeding proteins.

A nonreceptor kinase requires a ligand to bind directly to it in order to phosphorylate other proteins.

How are receptors classified?

Growth factors are a family of proteins that bind to receptors with the main purpose of proliferating and/or differentiating?

Which of these is a pro of an enzymatic cascade?

Phosphorylation adds a phosphate group to ______, threonine, and tyrosine residues in a protein, changing their shapes, and activating or inactivating the protein

most common calcium-binding motifs are? you can pick > 1 ans

activation of PLC by GPCRs to generate the two second messengers, which are? you can pick > 1 ans

Which domains bind to RTKs after ligand binding? you can pick > 1 ans

For RTKs, cis-autoinhibition occurs when ____?

RTKs have how many transmembrane domain?

Gαi family members activate phospholipase C (PLC), which cleaves phosphatidylinositol bisphosphate (PIP2) into diacylglycerol and inositol triphosphate (IP3). True or False

Gαs stimulates adenylyl cyclase (AC) and increases cyclic AMP (cAMP) levels.

True or false?

Which of the following is an eg of receptor tyrosine kinase? you can pick > 1 ans

Which of the following is an eg of g protein coupled receptor?