Item21 Item 21 Neurons have a _______ membrane potential of –70mV. In other words, this is their stable membrane potential under normal conditions. Fill in the blankFill in the blankItem22 Item 22When a skin wound is healing, cell contact on all sides is a strong stimulus for cell division.Group startsTrue or False Item23 Item 23Which choice describes the activation steps of a G protein-coupled receptor properly (and in correct order)?Multiple Choice Ligand binds to receptor, G protein activated, effector protein activated, second messenger made available Ligand binds to receptor, second messenger activated, G protein turned on, protein kinase activated Protein kinase activated, ion channel opened, ions enter and activate second messenger, G protein turned on Ion channel opened, G protein activated, second messenger synthesized, phosphatase ends signal

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Item 21

Neurons have a _______ membrane potential of –70mV. In other words, this is their stable membrane potential under normal conditions.

Fill in the blank

Item22

Item 22

When a skin wound is healing, cell contact on all sides is a strong stimulus for cell division.

Group startsTrue or False

Item23

Item 23

Which choice describes the activation steps of a G protein-coupled receptor properly (and in correct order)?

Multiple Choice

Ligand binds to receptor, G protein activated, effector protein activated, second messenger made available
Ligand binds to receptor, second messenger activated, G protein turned on, protein kinase activated
Protein kinase activated, ion channel opened, ions enter and activate second messenger, G protein turned on
Ion channel opened, G protein activated, second messenger synthesized, phosphatase ends signal

Expert Solution

Step 1

Neurons are the structural and functional units of the nervous system. These cells are capable of perceiving and transmitting the electrical impulse, upon arrival of a stimulus. These cells maintain a membrane potential that is essential for their conductive activities.