Ch 8 Flashcards
An increase in heart rate called ____ occurs when ___ from sympathetic nerves stimulates an increase in the depolarization rate of pacemaker cells
Tachycardia
NE
A pulmonary blood circuit occurs in ____
Most tetrapods
During ___\ blood pressure in systemic arteries exceeds blood pressure in the ventricles and an initial backflow of blood closes the semilunar valves
Ventricular diastole
Which of the following would lead to edema
Blockage of lymphatic capillaries by parasites
In an ECG the ____ coincides with the beginning of ventricular systole
QRS complex
Which of the following correctly describes the relative blood pressure in systemic and pulmonary blood circuits
Systemic>pulmonary
Relatively ___ changes in blood pressure are regulated by a \__ control mechanism called the baroreceptor reflex
Quick, short term
Neural
An increase in ______ would tend to counteract an increase in blood pressure
Urine output
A(n) ___ has a closed circulatory system
Octopus
The right ventricle pumps _______ and the left ventricle pumps
Deoxygenated blood to the lungs
Oxygenated blood to the body
When standing, the blood pressure in an artery in your ankle would be ____ the blood pressure in an artery in your arm
Greater than
_______ volume refers to the amount of blood in ventricles just prior their contraction. If this volume ______ then the heart contracts more forcefully
End diastolic
Increases
During exercise increased metabolic rate of muscle would lead to ______ carbon dioxide production that would trigger ______ in muscle capillaries
Increases
Vasodilation
The T wave of an ECG coincides with
Ventricular repolarization
The correct sequence of blood flow through heart valves is _____
Right AV, pulmonary semilunar, left AV, Aortic semilunar
At the VENULE end of capillaries, fluid moves _____ capillaries because blood pressure is _____ than osmotic pressure due to plasma proteins
Into
Less
Arteries are defined as blood vessels that carry _____\
Blood away from the heart
In comparison to the features of a closed circulatory system, which if he follow un is not a characteristic of an open circulatory system
More rapid return of blood to the heart
Which if he following is the correct path of blood flow
Right atrium Right ventricle Pulmonary arteries Pulmonary veins Left atrium Left ventricle
An increase in ______ does not promote vasodilation
Nitric oxide
_______ shock results from severe allergic reaction
Anaphylactic
Insects and most crustaceans have ______ circulatory systems which transports a fluid called ______ through the body
An open
Hemolymph
The walls of _____ are thicker primarily because the tunica _____ is thicker
Arteries
Media
The type of capillaries within skin and muscles are _____
Continuous
