Chapter 6 Flashcards Preview

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Flashcards in Chapter 6 Deck (15):
1

What are the 4 basic methods of cell communication?

Gap Junction, Contact Dependent, Chemicals that diffuse, Combination of Chemical and Electrical Signals

2

what is a paracrine signal?

A chemical that acts on cells in the immediate vicinity

3

what is a good example of a paracrine signal?

histamine

4

what are chemicals secreted by neurons called?

nerocrine molecules

5

what type of nuerocrine has a rapid onset?

neurotransmitter

6

Why do some cells respond to chemical signals but not others?

Differences in the receptor proteins

7

What is a first messenger?

The ligand that binds to the target cell

8

What are the 3 types of cell receptors?

G protein-coupled receptors, receptor-enzyme, and integrin receptors

9

What is signal transduction?

The process of how a cell converts a signal into a response

10

What are the two common amplifiers for g proteins?

Adenyly cyclase, and phosphlipase C

11

In the tyrosine kinase pathway what does the amplifier enzyme convert gtp too?

Cyclic GMP

12

Name two processes that can stop receptor activity?

Can be degraded by enzymes, or terminated by endocytosis

13

What is tonic control?

A signal is always present, but changes in the intensity of the signal cause a change in response

14

In what reflex does an endocrine cell act as both a sensor and an integrating center?

Simple endocrine reflex

15

What is the difference between a simple neural reflex, and a neuroendocrine reflex?

Neuroendocrine reflex uses the blood stream to transport a nuerohormone.