Neurotransmitters And Receptors

Question 1

What receptor is responsible for bronchodilation when activated?

Answer 1

B2

Question 2

What is the action of the M3 receptor in the lungs?

Answer 2

When activated, this leads to bronchoconstriction.

Question 3

What effect does the autonomic nervous system have on atrial muscle?

Answer 3

This is innervated by the parasympathetic nervous system, M2 and there is reduction in force of contraction.

Question 4

Describe the sympathetic innervation of blood vessels in skeletal muscle

Answer 4

There are B2 receptors and vasodilation occurs when these are activated

Question 5

What receptors are found in most blood vessels and what action occurs on them?

Answer 5

A1 adrenoreceptors. These form part of the sympathetic nervous system and lead to vasoconstriction when activated.

Question 6

What receptors are found In Sweat glands?

Answer 6

Muscarinic receptors. These are part of the sympathetic but are unusual as acetylcholine is the post ganglionic transmitter.