Packet 6 - Circulatory Function (4)

Question 1

Blood flow requires…

Question 2

Control Mechanisms for Cardiac Function & Blood Flow

Controls cardiac function and blood flow through heart rate and arterial dilation/constriction.

a. ) Kidneys
b. ) ADH / Vasopressin
c. ) Autonomic Nervous System (ANS)

Answer 2

c.) Autonomic Nervous System (ANS)

Controls cardiac function and blood flow through heart rate and arterial dilation/constriction.

Question 3

Control Mechanisms for Cardiac Function & Blood Flow

Controls cardiac function and blood flow through arterial dilation/constriction and blood volume.

a. ) Kidneys
b. ) ADH / Vasopressin
c. ) Autonomic Nervous System (ANS)

Answer 3

b.) ADH / Vasopressin

Controls cardiac function and blood flow through arterial dilation/constriction and blood volume.

Question 4

Control Mechanisms for Cardiac Function & Blood Flow

Controls cardiac function and blood flow through arterial dilation/constriction and blood volume.

a. ) Kidneys
b. ) ADH / Vasopressin
c. ) Autonomic Nervous System (ANS)

Answer 4

a.) Kidneys

Controls cardiac function and blood flow through arterial dilation/constriction and blood volume.

Question 5

Control Mechanisms for Cardiac Function & Blood Flow

Functions through medullary control centers. The vasomotor center (sympathetic-mediated → increase in HR and contractility, and changes in blood vessel tone) and cardioinhibitory center (parasympathetic-mediated → decrease in HR).

a. ) Kidneys
b. ) ADH / Vasopressin
c. ) Autonomic Nervous System (ANS)

Answer 5

c.) Autonomic Nervous System (ANS)

Functions through medullary control centers.

Vasomotor center (sympathetic-mediated → increase in HR and contractility, and changes in blood vessel tone)

Cardioinhibitory center (parasympathetic-mediated → decrease in HR).

Question 6

Control Mechanisms for Cardiac Function & Blood Flow

Normally adjust elimination of sodium and water to keep BP within normal limits.

a. ) Kidneys
b. ) ADH / Vasopressin
c. ) Autonomic Nervous System (ANS)

Answer 6

a.) Kidneys

BP only

Normally adjust elimination of sodium and water to keep BP within normal limits.

Also affects BP through RAAS (renin-angiotensin-aldosterone system).

Question 7

Control Mechanisms for Cardiac Function & Blood Flow

Hormone from posterior pituitary released in response to decreased blood volume / BP ⇒ vasoconstriction and decreases the excretion of water.

a. ) Kidneys
b. ) ADH / Vasopressin
c. ) Autonomic Nervous System (ANS)

Answer 7

b.) ADH / Vasopressin

BP only

Hormone from posterior pituitary released in response to decreased blood volume / BP ⇒ vasoconstriction and decreases the excretion of water.

Question 8

Control Mechanisms for Cardiac Function & Blood Flow

Also affects BP through RAAS (renin-angiotensin-aldosterone system).

a. ) Kidneys
b. ) ADH / Vasopressin
c. ) Autonomic Nervous System (ANS)

Answer 8

a.) Kidneys

BP only

Normally adjust elimination of sodium and water to keep BP within normal limits.

Also affects BP through RAAS (renin-angiotensin-aldosterone system).

Renin released from juxtaglomerular cells of kidneys in response to fall in BP ⇒ converts angiotensinogen to angiotensin I ⇒ ACE in blood vessels of lung converts angiotensin I to II ⇒ vasoconstriction (short-term mechanism) and increases aldosterone from adrenal cortex ⇒ sodium and water retention (long-term mechanism)