explain the different effects the neurotransmitter acetylcholine has on voluntary skeletal muscle versus cardiac muscle. for...

explain the different effects the neurotransmitter acetylcholine has on voluntary skeletal muscle versus cardiac muscle. for each type of muscle, identify the subdivision of the nervous systerm that is releasing acetycholine.

Expert Solution

A neurotransmitter like acetylcholine has excitatory and inhibitory effect depending upon the type of receptors.

In skeletal muscle the receptor for acetylcholine is Nicotonic receptors, they are also known as cholinergic receptors since they bind to acetylcholine, when acetylcholine binds to these receptors they cause the depolarization of the target cell, which causes the muscles to contract, thus the neurotransmitter acetylcholine is excitatory at the neuromuscular junction in skeletal muscle.

In cardiac muscle, the receptor for acetylcholine is muscarinic receptors, when acetylcholine binds to these receptors, they cause hyperpolarizatioin of the target cell, which inhibits the firing of an action potential, thus neurotransmitter acetylcholine is inhibitory at the neuromuscular junction in cardiac cells. Inhibitory action of acetylcholine decreases the heart rate and myocardial contraction.

Nicotinic receptors (skeletl muscle) help transmit outgoing signals for the sympathetic and parasympathetic systems.

Muscarinic receptors( cardiac muscles) help transmitting signals only to the parasympathetic system

Sydney Mullin answered 1 year ago

Why does acetylcholine excite skeletal muscle fibers but inhibit cardiac muscle fibers?

Match the following: Acetylcholine in smooth muscle Acetylcholine in skeletal muscle Acetylcholine in pancreas Acetylcholine in...

Match the following: Acetylcholine in smooth muscle Acetylcholine in skeletal muscle Acetylcholine in pancreas Acetylcholine in cardiac muscle a. Functions via G protein and phospholipase C b. Opening of chemically gated Na+ channels c. Functions via G protein, opens up K+ channels d. Functions via G protein, activates protein kinase G e. Functions via calcium and activates Protein kinase C Group of answer choices 42. Acetylcholine in smooth muscle [ Choose ] B. Opening of...

Explain the effects of hypocalcemia in the body. Why muscle cells (cardiac vs skeletal) are affected...

Explain the effects of hypocalcemia in the body. Why muscle cells (cardiac vs skeletal) are affected differently? Explain the symptoms seen in the heart and compare them to skeletal muscle symptoms.

Compare and contrast the excitation-contraction coupling mechanisms of skeletal muscle versus contractile cardiac muscle. Need detailed...

Compare and contrast the excitation-contraction coupling mechanisms of skeletal muscle versus contractile cardiac muscle. Need detailed answers please.

Explain the process of contraction of: Skeletal muscle and cardiac muscle (show the differences between them)...

Explain the process of contraction of: Skeletal muscle and cardiac muscle (show the differences between them) Smooth muscle Draw the action potential of a skeletal muscle cell, Sinoatrial Node cell, cardiac muscle, and smooth muscle cell and explain the differences between them.

Which stage of cellular respiration produces the most ATP? Explain. Explain why skeletal muscle is voluntary...

Which stage of cellular respiration produces the most ATP? Explain. Explain why skeletal muscle is voluntary and cardiac muscle and smooth muscle are involuntary

Both rhodopsin in vision and the muscarinic acetylcholine receptor system in cardiac muscle are coupled to...

Both rhodopsin in vision and the muscarinic acetylcholine receptor system in cardiac muscle are coupled to ion channels via G proteins. Describe at least two similarities and two differences between these two systems.

500 words that compares and contrasts the CELLULAR FUNCTION of skeletal muscle, smooth muscle, and cardiac...

500 words that compares and contrasts the CELLULAR FUNCTION of skeletal muscle, smooth muscle, and cardiac muscle (a type of skeletal muscle)

1. A. Compare the action potentials observed in cardiac muscle and skeletal muscle. B. Then describe...

1. A. Compare the action potentials observed in cardiac muscle and skeletal muscle. B. Then describe the action potential associated with the sinoatrial node. C. Describe the conduction system of the heart. 2.A. State the equations used to determine SV and CO. State the average values for all components. B. What happens to stroke volume when: i. ESV increases and decreases ii. EDV increases and decreases iii. increased sympathetic innervation iv. increased parasympathetic innervation v. afterload increases and decreases C....

Explain in detail the physiological functions and mechanisms of action of a neurotransmitter (Acetylcholine) and explain...

Explain in detail the physiological functions and mechanisms of action of a neurotransmitter (Acetylcholine) and explain how drugs can alter their function.

Question