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Bio 1104 Test 3 Study Questions And Answers With Verified Solutions
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Bio 1104 Test 3 Study Questions And Answers With Verified Solutions
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Bio 1104 Test 3 Study Questions And Answers WithVerified Solutions
What is the purpose of a negative feedback system in governing homeostasis? ANS It counteracts changes in
the environment that alter the cell's normal functioning.
Hypertension damages the lining of the arterioles of the kidneys, which results in the release of molecules that
further raise blood pressure. This is an example of a(n): ANS positive feedback loop
In humans, temperature sensors in the body measure the body's current temperature and send the measurement
to the control center, the __________. ANS hypothalamus: control center of the brain that will make
adjustments to maintain body temp
What is the name of the hormone that stimulates uterine contractions during childbirth? ANS Oxytocin:
triggered by fetuses head pressing on cervix during childbirth
What is the major difference between an open circulatory system and a closed circulatory system? ANS In the
closed circulatory system, blood is confined to a heart and blood vessels, whereas in an open system, hemolymph
(blood) moves from a heart through vessels into interconnected spaces called a "hemocoel."
Blood returns to the heart via the _____. ANS Pulmonary veins: They carry oxygenated blood from the left
atrium
From the pulmonary veins, blood flows to the _____. ANS Left atrium
From the anterior vena cava, blood flows to the _____. ANS right atrium: Blood enters here from the anterior
and posterior venae cavae
Which chambers of the vertebrate heart pump blood through the lungs and to the rest of the body? ANS
Ventrioles: Vertebrates have 2 ventricle chambers
What is the force (pressure) measured during the heart's ventricular contractions called? ANS Systolic pressure:
The higher of the 2 readings when you have blood pressure taken
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