Blood circulation

Peripheral resistance affect

• the length of myocardial fibers.

• Blood pressure and blood flow

• cardiac out put

• elasticity of the heart.

The cardiovascular center is located in the

• pons
• medulla oblongata
• cerebrum
• cerebelum

Which of the following is not a mechanism that increases blood volume and therefore venous return of blood to the heart?

• Antidiuretic hormone
• Aldosterone
• Atrial natriuretic hormone 
• Renin-angiotensin mechanism

A decrease in total plasma volume results from the _____ effect

• atrial natriuretic hormone

• antidiuretic hormone

• renin-angiotensin

• aldosterone

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NGSS.HS-LS1-3

Vasomotor control mechanisms regulates

• diameter of capillaries.

• cardiac output.

• stroke volume.

• diameter of arterioles.

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NGSS.HS-LS1-3

_______ increase the total blood volume.

• ADH

• Aldosterone

• ANP

• noradrenaline

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NGSS.HS-LS1-3

The stimulus that causes the release of ADH hormone into the blood to maintain water balance is

• increased osmolality of the blood

• dilution of solutes in the blood

• high blood pressure

• low concentration of salt in blood

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NGSS.HS-LS1-3

Renin, a protein that is important in blood pressure regulation is released by the

• kidney

• heart

• liver

• lungs

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NGSS.HS-LS1-3

Which of the following best illustrates the sequence of what will happen when the body experiences increased blood pressure?

• Sensors detect increased pressure--> signal sent to brain--> blood vessels dilate--> pressure decreases

• brain detects increased pressure--> signal from brain to sensors--> signal blood vessels dilate--> pressure decreases

• Baroreceptors sense increased pressure-->signal sent to brain--> signal to circulatory system--> blood vessels dilate--> pressure decreases

• brain detects increased pressure--> signal from brain to senseors--> signal from sensors to circulatory system--> pressure decreases

Tags

NGSS.HS-LS1-3

Arteries contain valves that prevent backward flow of blood.

• true

• false