Biology Circulatory Review

Blood pressure is a measurement of...

• force applied by blood on the blood vessel walls

• fluid volume in the blood vessels

• force of blood on the body walls

• pressure by blood on brain

Function of the circulatory system

• transports oxygen and nutrients throughout the body & remove wastes like CO2 from tissues

• regulate blood glucose levels

• process sensory information

• absorb oxygen from the air

What structure in the respiratory system is responsible for gas exchange between inhaled air & blood?

• alveoli

• kidney

• lungs

• liver

The function of valves in the heart is to

• stimulate the heartbeat.

• prevent the backward flow of blood.

• accelerate the flow of blood.

• serve as a cushion to prevent friction.

Which component of blood is directly responsible for transporting oxygen to body cells?

• plasma

• red blood cells

• platelets

• white blood cells

What happens when concentration of oxygen is higher in the alveoli than in the blood?

• Diffusion of O2 in the alveoli

• Diffusion of O2 into blood

Tags

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Is concentration of CO2 is higher in inhaled air or exhaled air?

• Inhaled air!

• Exhaled air! CO2 is a waste product from cells

At the bottom of the chest cavity is a large, flat muscle called the _____________.

• biceps

• spleen

• diaphragm

• umbilicus

Why do our cells need oxygen?

• needed to copy DNA

• needed by lysosome to recycle organelles

• needed by the mitochondria to make energy (ATP)

• not needed by cells

Tags

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Pulmonary circulation carries oxygen poor blood to the ______________ and back.

• brain

• lungs

• kidneys

• stomach