Which of the following describes maintaining a normal internal environment?
Normal feedback
Positive feedback
Negative feedback
Homeostasis
The Correct Answer is D
A. Normal feedback: Not a recognized physiologic term for regulation of internal balance.
B. Positive feedback: Amplifies change (e.g., oxytocin during childbirth) rather than maintaining stability.
C. Negative feedback: Counteracts change (e.g., insulin lowering high blood sugar) and is a major mechanism of regulation, but the broader concept is part of homeostasis.
D. Homeostasis: The overall process of maintaining a stable internal environment despite external changes, achieved largely through negative feedback mechanisms.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Subclavian vein: Drains the upper limb and ultimately feeds into the brachiocephalic veins and superior vena cava, which return blood to the right atrium.
B. Pulmonary vein: Carries oxygenated blood from the lungs to the left atrium, not the right atrium.
C. Inferior vena cava: Returns deoxygenated blood from the lower body directly into the right atrium.
D. Umbilical vein: In fetal circulation this returns oxygenated blood from the placenta to the fetus (and becomes a ligament after birth), so it does not return blood to the postnatal right atrium.
Correct Answer is D
Explanation
A. Connective tissue that connects bone to bone: This describes a ligament, which links bones at a joint, not a tendon.
B. Connective tissue that covers muscles: Muscle coverings are layers like the epimysium or fascia; tendons are not the general covering of muscle.
C. Connective tissue that covers nerves: Nerves are wrapped by sheaths such as the epineurium and perineurium; tendons serve a different function.
D. Connective tissue that connects muscle to bone: Tendons are dense, collagen-rich structures that transmit the force of muscle contraction to bone.
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