Exam 1: BIOS 251 / BIOS251 (Latest
Update ) Anatomy and
Physiology I with Lab | Questions
and Answers | 100% Correct |
Grade A - Chamberlain
Question:
What are two signal transduction mechanisms
Answer:
intracellular receptor mediated responses
membrane-bound receptor mediated responses
some receptors are located inside the cell, others are membrane proteins
,Question:
actions of intracellular receptor-mediated messengers on target cell
Answer:
- messenger has to be able to diffuse into cell (i.e., lipid soluble)
- receptor can be in cytoplasm or in nucleus ---> alter protein synthesis
Question:
what are the 3 main membrane receptor mediated responses?
Answer:
channel-linked receptors
enzyme-linked receptors
G-protein-linked receptors
,Question:
signal amplification via G protein
Answer:
many intracellular regulatory proteins from a few extracellular messengers
Question:
channel-linked receptors
Answer:
receptors that open/close ion channels in response to messenger binding
= ligand (chemical) gated ion channels
Question:
ligand-gated channels
Answer:
- open or close in response to binding of ligand to receptor
- open channels correspond to increased permeability (allow diffusion of
ions)
- has two main categories
, Question:
what is a ligand
Answer:
messenger that binds to receptor/channel
Question:
what are the two main categories of ligand-gated channels
Answer:
fast and slow channels
Question:
fast channels
Answer:
receptor and channel are same protein
Question:
slow channels
Answer:
receptor coupled to channel by G protein
Update ) Anatomy and
Physiology I with Lab | Questions
and Answers | 100% Correct |
Grade A - Chamberlain
Question:
What are two signal transduction mechanisms
Answer:
intracellular receptor mediated responses
membrane-bound receptor mediated responses
some receptors are located inside the cell, others are membrane proteins
,Question:
actions of intracellular receptor-mediated messengers on target cell
Answer:
- messenger has to be able to diffuse into cell (i.e., lipid soluble)
- receptor can be in cytoplasm or in nucleus ---> alter protein synthesis
Question:
what are the 3 main membrane receptor mediated responses?
Answer:
channel-linked receptors
enzyme-linked receptors
G-protein-linked receptors
,Question:
signal amplification via G protein
Answer:
many intracellular regulatory proteins from a few extracellular messengers
Question:
channel-linked receptors
Answer:
receptors that open/close ion channels in response to messenger binding
= ligand (chemical) gated ion channels
Question:
ligand-gated channels
Answer:
- open or close in response to binding of ligand to receptor
- open channels correspond to increased permeability (allow diffusion of
ions)
- has two main categories
, Question:
what is a ligand
Answer:
messenger that binds to receptor/channel
Question:
what are the two main categories of ligand-gated channels
Answer:
fast and slow channels
Question:
fast channels
Answer:
receptor and channel are same protein
Question:
slow channels
Answer:
receptor coupled to channel by G protein
