Nervous and Hormonal Control of the Circulation

Why does the circulation need to be controlled?

Is it intrinsically or extrinsically controlled?

TPR and BP can be controlled by release of _____________ and ___________.

How is the release of neurotransmitters mediated?

In blood vessels, sympathetic _____________ fibres exist in the T. ___________. On these fibres are ______ ___ ___________, and it is from here that ___ is released.

How does this achieve vascular tone?

Where does the NA bind to?

Give 2 reasons why this is helpful to meet the body's needs.

How might this be useful in maintaining blood volume, for example?

Which other nerves can affect blood vessels but are less common?

What are the 3 types of vasodilator nerves?

Where are parasympathetic vasodilator fibres found, and which neurotransmitters activate them? (3)

Where are sympathetic vasodilator fibres found, and which gland are they associated with? (1)

When sensory vasodilator fibres are activated, what is this in response to and what happens at the area?

What is their mechanism of action?

Name 4 hormones which help control circulation

When and from where is adrenaline released?

Which receptors does adrenaline have higher affinity for?

Where are there beta 2 receptors that allow dilatation? (3)

Which receptors cause vessel constriction?

What is the effect of adrenaline? (4)

What causes secretion of Renin from the kidneys? (2)

What does Renin do?

What does Ang II do? (3)

What does aldosterone do?

Where is vasopressin (ADH) secreted from?

What stimulates the secretion of ADH? (2)

What effect does ADH have? (2)

Where is ANP released from?

What stimulates its release? (2)

What receptor does ANP bind to?

What effect does ANP have?