Exam 49: Circulatory Systems

A piece of a thrombus breaking loose can travel through the arteries and eventually become lodged in a vessel of small diameter, resulting in a condition called a(n) _______.

Birds and mammals have a _______ circuit in which blood is pumped from the heart to the lungs and back to the heart.

The timing of the spread of the action potential from atrium to ventricle is controlled by the

The circulating protein fibrinogen contributes to blood clotting by

Arteries are vessels that carry blood away from the heart and _______ are vessels that carry blood back to the heart.

In open circulatory systems, the fluid called _______ leaves the vessels of the circulatory system before flowing over the organs.

Evaluate the following statement for accuracy: Open circulatory systems are found only in inactive, sedentary animals.

The function of platelets is to

A paleontologist finds a fragment of a fossilized vertebrate that indicates that the animal had a three-chambered heart.The animal could have been a(n)

Which statement about ion movements and ventricular muscle cells is false?

Which statement about the closed circulatory systems of vertebrates is false?

Blood is at its lowest pressure in the

Design a multicellular animal without a gastrovascular cavity that can live without a circulatory system.Include a brief description of its features and explanation of why a circulatory system is unnecessary.

Which statement about circulatory systems is false?

Refer to the figure, which shows the mammalian circulatory system.The arrow indicates the direction of blood flow. Starting with chamber 4, in what order does blood pass through the four chambers of the heart?

Turtles can largely bypass the lung circuit and pump blood around the body because of the incomplete division of their _______.

Refer to the table. Complete the table by correctly matching adult vertebrate groups to their heart structures, from first row to last row.

Which of the following characterizes an animal that does not have a circulatory system?

You are a physician and one of your patients, who smokes and suffers from high blood pressure, presents with chest pain and shortness of breath.What condition might these symptoms indicate? What steps likely led to the condition?

Which is an incorrect pairing of substance(s) and its/their role in blood clotting?