AP Bio - Ch 5.6: Cell Signaling QUIZ 1

Which of the following is a type of long-distance signaling?

• Endocrine signaling
• Paracrine signaling
• Synaptic signaling

Which of the following types of signaling involves the secretion of hormones by cells?

• paracrine signaling
• endocrine signaling
• synaptic signaling

Which of the following involves signaling in the nervous system where electrical signals along nerve cells trigger the secretion of neurotransmitter molecules?

• endocrine signaling
• paracrine signaling
• synaptic signaling

A signaling molecule that specifically binds to another molecule is known as a(n)

• enzyme
• ligand
• receptor
• channel protein

In which stage of cell signaling does the ligand bind to its receptor?

• Response
• Reception
• Transduction

Most signal receptors are

• ligands
• plasma (cell) membrane proteins
• hormones
• secretory vesicles

Which of the following would be the fate of animal cells that lack receptors for local paracrine signaling molecules?

• They would be unable to respond to hormone signals in the bloodstream
• They would be unable to grow and divide in response to signals from nearby cells
• They would bind to locally secreted growth factors & intracellular pathways would be blocked
• They would grow and divide normally

The secretion of a signal molecule by a cell into the local environment, followed by a response by a number of cells in the immediate vicinity is an example of

• endocrine signaling
• paracrine signaling
• synaptic signaling
• hormonal signaling

When a neuron cell responds to a particular neurotransmitter by opening gated ion channels, the neurotransmitter is serving as which part of the signal pathway?

• transducer
• relay molecule
• receptor
• signal molecule

Which of the following characteristics is unique to plant hormones?

• Plant hormones may be delivered to target cells through the air
• Plant hormones may be delivered to target cells through a vascular system
• The targets for plant hormones may be located large distances from the cells that produce and secrete hormones