BIO 1409 - EXAM 1 QUESTIONS WITH ACCURATE
ANSWERS A+ GRADED
List the 3 components of the circulatory system. - ANSWER 1. The Blood
2. The Heart
3. Blood Vessels
In addition to the earthworm, identify 2 groups of animals that have a closed circulatory
system. - ANSWER Fish, amphibians, reptiles, birds, and mammals.
Which set of chambers supplies blood to the pulmonary circuit? - ANSWER The right
side (right atrium and ventricles) which pumps deoxygenated blood to the pulmonary
circuit.
Why is the left ventricle more muscular than the right ventricle? - ANSWER The left
ventricle also has a thicker muscular wall than the right ventricle due to the higher
forces needed to pump blood through the systemic circuit (around the body) compared
to the pulmonary circuit.
In a mammal, where does blood with a low oxygen concentration enter the heart? -
ANSWER The oxygen-poor blood enters the right atrium (RA), or the right upper
chamber of the heart.
The bicuspid valve prevents the blood from flowing back into what structure? - ANSWER
prevents blood from flowing from the left ventricle to right atrium.
What valve is located between the right ventricle and the pulmonary artery (give all
names)? - ANSWER the tricuspid valve, located between the right atrium and the right
ventricle; the pulmonary (pulmonic) valve, between the right ventricle and the
pulmonary artery.
, Rheumatic fever is a bacterial disease that can result in degeneration of heart valves.
What would that disease cause? - ANSWER Strep throat, scarlet fever, heart disease.
When your blood pressure is measured from an artery in your arm, you are measuring
blood pressure produced by what structure of the heart? - ANSWER A
sphygmomanometer has three parts: a cuff that can be inflated with air, a pressure
meter (manometer) for measuring air pressure in the cuff, and a stethoscope for
listening to the sound the blood makes as it flows through the brachial artery (the major
artery found in your upper arm). To measure blood pressure, the cuff is placed around
the bare and stretched out upper arm, and inflated until no blood can flow through the
brachial artery. Then the air is slowly let out of the cuff.
As soon as the air pressure in the cuff falls below the systolic blood pressure in the
brachial artery, blood will start to flow through the arm once again. This creates a
pounding sound when the arteries close again and the walls of the vessels hit each
other after a heart beat. The sound can be heard by placing the stethoscope close to the
elbow. Right when you start to hear this pounding for the first time you can read your
systolic blood pressure off the pressure meter.
How long does the average adult red blood cell live? - ANSWER 120 days.
Which blood constituent makes up more of the volume of blood? - ANSWER blood
plasma
Approximately 99% of blood cells are involved in what function? - ANSWER transport
oxygen and nutrients around the body? (unsure)
Identify the corpuscles in which hemoglobin is found. - ANSWER red blood cell
What are the functions of leukocytes? - ANSWER White blood cells (WBCs), also called
leukocytes, are the cells of the immune system that are involved in protecting the body
against both infectious disease and foreign invaders
What primarily drives the return of blood to the heart in the systemic venous circulation?
- ANSWER The return of blood to the heart is assisted by the action of the skeletal-
muscle pump. As muscles move, they squeeze the veins running through them. Veins
ANSWERS A+ GRADED
List the 3 components of the circulatory system. - ANSWER 1. The Blood
2. The Heart
3. Blood Vessels
In addition to the earthworm, identify 2 groups of animals that have a closed circulatory
system. - ANSWER Fish, amphibians, reptiles, birds, and mammals.
Which set of chambers supplies blood to the pulmonary circuit? - ANSWER The right
side (right atrium and ventricles) which pumps deoxygenated blood to the pulmonary
circuit.
Why is the left ventricle more muscular than the right ventricle? - ANSWER The left
ventricle also has a thicker muscular wall than the right ventricle due to the higher
forces needed to pump blood through the systemic circuit (around the body) compared
to the pulmonary circuit.
In a mammal, where does blood with a low oxygen concentration enter the heart? -
ANSWER The oxygen-poor blood enters the right atrium (RA), or the right upper
chamber of the heart.
The bicuspid valve prevents the blood from flowing back into what structure? - ANSWER
prevents blood from flowing from the left ventricle to right atrium.
What valve is located between the right ventricle and the pulmonary artery (give all
names)? - ANSWER the tricuspid valve, located between the right atrium and the right
ventricle; the pulmonary (pulmonic) valve, between the right ventricle and the
pulmonary artery.
, Rheumatic fever is a bacterial disease that can result in degeneration of heart valves.
What would that disease cause? - ANSWER Strep throat, scarlet fever, heart disease.
When your blood pressure is measured from an artery in your arm, you are measuring
blood pressure produced by what structure of the heart? - ANSWER A
sphygmomanometer has three parts: a cuff that can be inflated with air, a pressure
meter (manometer) for measuring air pressure in the cuff, and a stethoscope for
listening to the sound the blood makes as it flows through the brachial artery (the major
artery found in your upper arm). To measure blood pressure, the cuff is placed around
the bare and stretched out upper arm, and inflated until no blood can flow through the
brachial artery. Then the air is slowly let out of the cuff.
As soon as the air pressure in the cuff falls below the systolic blood pressure in the
brachial artery, blood will start to flow through the arm once again. This creates a
pounding sound when the arteries close again and the walls of the vessels hit each
other after a heart beat. The sound can be heard by placing the stethoscope close to the
elbow. Right when you start to hear this pounding for the first time you can read your
systolic blood pressure off the pressure meter.
How long does the average adult red blood cell live? - ANSWER 120 days.
Which blood constituent makes up more of the volume of blood? - ANSWER blood
plasma
Approximately 99% of blood cells are involved in what function? - ANSWER transport
oxygen and nutrients around the body? (unsure)
Identify the corpuscles in which hemoglobin is found. - ANSWER red blood cell
What are the functions of leukocytes? - ANSWER White blood cells (WBCs), also called
leukocytes, are the cells of the immune system that are involved in protecting the body
against both infectious disease and foreign invaders
What primarily drives the return of blood to the heart in the systemic venous circulation?
- ANSWER The return of blood to the heart is assisted by the action of the skeletal-
muscle pump. As muscles move, they squeeze the veins running through them. Veins
