BIOLOGY 1002 EXAM 4 2026 FINAL PAPER
SOLVED QUESTIONS ANSWER KEY APLUS
◉ Circulatory systems have 3 major parts:
Answer: 1. A fluid that circulates (blood)
2. A channel (vessels) that the fluid circulates through
3. A pump (heart) to keep the fluid moving
◉ In the open circulatory system, part of the "channel" that the fluid
circulates through is an open space called the...
Answer: Hemocoel
◉ 7 Major Functions of the Vertebrate Circulatory System
Answer: 1. Transport of oxygen to the tissues
2. Transport of the nutrients to the tissue
3. Transport of waste from the tissues
4. Distribution of hormones
5. Regulation of body temperature (homeostasis)
6. Prevention of blood loss (clotting)
7. Protection from invaders (immune system)
,◉ Type of heart design in fish
Answer: 2-chambered heart
◉ Type of heart design in amphibians and reptiles
Answer: 3-chambered heart
◉ Type of heart design in birds and mammals
Answer: 4-chambered heart
◉ Blood goes from ____________ to _______________
Answer: atrium, ventricle
◉ In the 4 CHAMBERED HEART, the right ventricle and left atrium
are used for...
Answer: Pulmonary circulation
◉ Pulmonary circulation is used for pumping blood to and receiving
blood back from the...
Answer: Lungs
◉ In the 4 CHAMBERED HEART, the left ventricle and right atrium is
used for...
,Answer: Systemic circulation
◉ Systemic circulation is used for pumping blood to and receiving
blood back from the...
Answer: Body
◉ The pumping action of the 4 CHAMBERED HEART makes up a...
Answer: Cardiac cycle
◉ The cardiac cycle is the alternating ________________ and
___________________ of the heart chambers
Answer: Contraction; Relaxation
◉ Cardiac Cycle
Answer: 1. The 2 atria contract pumping blood into the ventricles
2. A fraction of a second later, Systole
3. Diastole
◉ Systole
Answer: When the 2 ventricles contract and force blood into the
arteries
, ◉ Diastole
Answer: When both chambers relax briefly
◉ Blood pressure is shown by ______________ pressure over
_______________ pressure.
Answer: Systolic; Diastolic
◉ The heart has 4 one way valves to ensure __________________ flow.
They are ... and ...
Answer: Unidirectional
2 Atrioventricular valves; 2 Semilunar valves
◉ Why the specific valves are one-way
Answer: Pressure in one direction opens the valve, while pressure in
the reverse direction closes them tightly
◉ Tricuspid Valve
Answer: Separates the right ventricle and atrium
◉ Bicuspid Valve
Answer: Separates the left ventricle and atrium
SOLVED QUESTIONS ANSWER KEY APLUS
◉ Circulatory systems have 3 major parts:
Answer: 1. A fluid that circulates (blood)
2. A channel (vessels) that the fluid circulates through
3. A pump (heart) to keep the fluid moving
◉ In the open circulatory system, part of the "channel" that the fluid
circulates through is an open space called the...
Answer: Hemocoel
◉ 7 Major Functions of the Vertebrate Circulatory System
Answer: 1. Transport of oxygen to the tissues
2. Transport of the nutrients to the tissue
3. Transport of waste from the tissues
4. Distribution of hormones
5. Regulation of body temperature (homeostasis)
6. Prevention of blood loss (clotting)
7. Protection from invaders (immune system)
,◉ Type of heart design in fish
Answer: 2-chambered heart
◉ Type of heart design in amphibians and reptiles
Answer: 3-chambered heart
◉ Type of heart design in birds and mammals
Answer: 4-chambered heart
◉ Blood goes from ____________ to _______________
Answer: atrium, ventricle
◉ In the 4 CHAMBERED HEART, the right ventricle and left atrium
are used for...
Answer: Pulmonary circulation
◉ Pulmonary circulation is used for pumping blood to and receiving
blood back from the...
Answer: Lungs
◉ In the 4 CHAMBERED HEART, the left ventricle and right atrium is
used for...
,Answer: Systemic circulation
◉ Systemic circulation is used for pumping blood to and receiving
blood back from the...
Answer: Body
◉ The pumping action of the 4 CHAMBERED HEART makes up a...
Answer: Cardiac cycle
◉ The cardiac cycle is the alternating ________________ and
___________________ of the heart chambers
Answer: Contraction; Relaxation
◉ Cardiac Cycle
Answer: 1. The 2 atria contract pumping blood into the ventricles
2. A fraction of a second later, Systole
3. Diastole
◉ Systole
Answer: When the 2 ventricles contract and force blood into the
arteries
, ◉ Diastole
Answer: When both chambers relax briefly
◉ Blood pressure is shown by ______________ pressure over
_______________ pressure.
Answer: Systolic; Diastolic
◉ The heart has 4 one way valves to ensure __________________ flow.
They are ... and ...
Answer: Unidirectional
2 Atrioventricular valves; 2 Semilunar valves
◉ Why the specific valves are one-way
Answer: Pressure in one direction opens the valve, while pressure in
the reverse direction closes them tightly
◉ Tricuspid Valve
Answer: Separates the right ventricle and atrium
◉ Bicuspid Valve
Answer: Separates the left ventricle and atrium
