Quizzes Exam 1 Flashcards
Water concentration in the body is critical for proper functioning. A person’s body retains very tight control on water levels without conscious control by the person. Which system has primary control over the amount of water in the body?
Urinary System
Integumentary System
Digestive System
Cardiovascular System
Urinary System
The sum of all chemical reactions in an organism is known as ___________________.
homeostasis
thermoregulation
responsiveness
metabolism
Metabolism
Which of the following is an example of a normal physiologic process that uses a positive feedback loop?
blood pressure regulation
regulation of fluid balance
temperature regulation
childbirth
Childbirth
From body temperature to blood pressure to levels of certain nutrients, each physiological condition has a particular set point. A set point is the physiological value around which the normal range fluctuates. A normal range is the restricted set of values that is optimally healthful and stable. This state of dynamic equilibrium is known as ______________________.
homeostasis
negative feedback
metabolism
positive feedback
Homeostasis
The endocrine system is _____________________.
responsible for producing hormones.
the external covering of the body.
responsible for returning fluid to the circulatory system.
the body’s fast acting control center.
responsible for producing hormones.
The __________________________ system produces movement.
cardiovascular
muscular
endocrine
integumentary
Muscular
This system picks up fluid leaked from blood vessels and returns it to the blood.
integumentary
endocrine
cardiovascular
lymphatic
Lymphatic
Which of the following is an example of positive feedback mechanism?
As calcium level rises in the blood, the excess calcium attaches itself to bone.
A blood clot forms after a chef cuts her finger.
A runner completes a race, and her heartbeat slows to a normal level.
A soccer game begins, and the players’ respirations rise because of exercise exertion.
A blood clot forms after a chef cuts her finger.
Two of these organ systems bear the major responsibility for ensuring homeostasis of the internal environment? Which two?
Nervous and endocrine
5K world record running times are slower with each increasing age group. This is the result of:
Homeostatic imbalance
