ESS 206 Exam I review

Who is the physiologist who coined the term "homeostasis"

• Claude Bernard

• Walter Cannon

• Albert Einstein

• Jacob Caldwell

This is a "protective" mechanism in the heart to reduce friction

• SA Node

• Interventricular septum

• Pericardial fluid

• Lung

During exercise our blood pH can drop. What does this indicate?

• Increased muscle mass

• Increased epinephrine

• Increased tide pod consumption

• Increased hydrogen ion formation

What do preganglionic sympathetic fibers have that postganglionic do not

• Neurotransmitter

• Myelinated

• unmyelinated fibers

• No differences exist.

This is the third step in the electrical activity of the heart

• SA node

• AV bundle

• AV node

• Subendocardial connecting network

If the pulmonary valve "sticks" and dose not open completely, which heart chamber may be impacted?

• Left ventricle

• Right ventricle

• Aorta

• Carotid artery

Which is the correct sequence of PO2 progressively decreasing

• Body tissues, arterial blood, alveolar air

• Alveolar air, atmospheric air, body tissues

• Atmospheric air, alveolar air, body tissues

• Body tissues, alveolar air, arterial blood

Where is the cardiovascular control center?

• Lungs

• Skeletal muscle

• Brain

• Medulla

Which of the following are true about oxygen transport by the blood?

• An environment of low PO2 is needed

• Under resting conditions, most of the hemoglobin releases oxygen

• Oxyhemoglobin dissociates easier/faster when blood enters active tissues

• Most of the oxygen transport in the blood is in the form of bicarbonate

Which blood component primarily helps with clotting?

• White blood cells

• Platelets

• Red blood cells

• Plasma