A muscle cell contains acetylcholine receptors that act as ligand-gated cation channels, and it also contains voltage-gated Na+ channels of the type found in neurons. In theory, could a muscle cell get away with having only acetylcholine-gated cation channels, which would serve the dual purpose of receiving neurotransmitter signals and propagating action potentials? Why or why not?
A muscle cell contains acetylcholine receptors that act as ligand-gated cation channels, and it also contains voltage-gated Na+ channels of the type found in neurons. In theory, could a muscle cell get away with having only acetylcholine-gated cation channels, which would serve the dual purpose of receiving neurotransmitter signals and propagating action potentials? Why or why not?
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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Musculoskeletal System
The musculoskeletal system, also called the locomotor system, is an organ system that gives humans and animals the ability to move using their muscular and skeletal systems. It provides stability, form, support, and movement to the body. The skeleton is composed of bones (skeleton), muscles, cartilage, tendons, ligaments, joints, and other connective tissue that supports and binds tissues and organs together. The musculoskeletal system is subdivided into two broad systems, such as the muscular system and the skeletal system.
Skeletal structure
The skeletal system is the core framework of the human body. The skeletal structure comprises bones and connective tissue, including cartilage, ligaments, and tendons. The skeletal structure of our body acts as a support structure. It maintains the body's shape and is responsible for its movement, blood cell formation, protection of organs, and mineral storage. The skeletal system is referred to as the musculoskeletal system.
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Transcribed Image Text:Evidence Question #7
1. Various types of vesicle coats have been implicated in membrane traffic pathways such
as endocytosis, export from the ER to the Golgi, and transport between Golgi
cisternae. But so far, no coat has been identified for the secretory vesicles that carry
material from the Golgi to the plasma membrane. Do you think such a coat is likely to
exist? Justify your answer.
2. A muscle cell contains acetylcholine receptors that act as ligand-gated cation channels,
and it also contains voltage-gated Na+ channels of the type found in neurons. In
theory, could a muscle cell get away with having only acetylcholine-gated cation
channels, which would serve the dual purpose of receiving neurotransmitter signals
and propagating action potentials? Why or why not?
3. Fluorescent FM dyes partition reversibly into biological membranes without
penetrating through them. Suppose that you have neurons cultured in a dish. You
incubate the neurons with an FM dye, and then you wash them with medium to
remove the dye.
a) You find that if the neurons are stimulated to trigger action potentials during
incubation with the dye, the synaptic regions of the neurons remain fluorescent
after the wash. Propose an explanation for this effect.
b) After generating fluorescent synaptic regions by this procedure, suppose that you
trigger additional action potentials while continuing to wash with medium. Would
you expect the synaptic regions to lose fluorescence? Explain.
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