Cell Communication (Part 1)

Synaptic signals are

• long-distance

• Local

• Hormones

• All of the above

A small signal that binds to a receptor is called a

• Signal transducer

• G-signal

• Molecule signal

• ligand

Testosterone

• Is steroid-based and turns on genes

• Is protein-based and turns on genes

• Is steroid-based and activates enzymes

• Is protein-based and activates enzymes

Ethylene gas and fruit ripening is an example of what type of feedback?

• Positive

• Negative

• Both

• Neither

What determines whether a cell will respond to a signal?

• Its relay proteins

• Its response proteins

• Its levels of ATP

• Its receptor

What does amphipathic mean?

• Polar

• Nonpolar

• Both polar and nonpolar parts

• None of the above

A signal for this receptor would include estrogen

• G protein receptor

• Tyrosine-kinase receptor

• Intra-cellular receptors

• Ligand-gated ion channels

This receptor cause multiple responses when activated

• G protein receptor

• Tyrosine-kinase receptor

• Intra-cellular receptors

• Ligand-gated ion channels

Typical response includes turning on genes or turning off genes

• G protein receptor

• Tyrosine-kinase receptor

• Intra-cellular receptors

• Ligand-gated ion channels

This receptor allows or prevents passive transport

• G protein receptor

• Tyrosine-kinase receptor

• Intra-cellular receptors

• Ligand-gated ion channels