General Concepts Flashcards
5 cards from real Anatomy and Physiology practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 5 General Concepts flashcards as text
Which of the following is the correct order of structural organization in the human body, from simplest to most complex?
Answer: Molecule → Cell → Tissue → Organ → Organ system → Organism
The correct hierarchy starts at the chemical level (molecules), builds to the cellular level, then to tissues, organs, organ systems, and finally, the organism as a whole.
What is homeostasis?
Answer: The ability of the body to maintain a stable internal environment
Homeostasis involves mechanisms that regulate the internal environment, such as maintaining temperature, pH, and electrolyte balance, to ensure optimal functioning of the body.
Which of the following body planes divides the body into left and right halves?
Answer: Sagittal plane
The sagittal plane divides the body into left and right sections. The mid-sagittal plane divides it equally, while other sagittal planes may not be symmetrical.
What is the primary function of mitochondria in cells?
Answer: Energy production
Mitochondria are the "powerhouses" of the cell, generating ATP (adenosine triphosphate) through cellular respiration, which provides energy for cellular functions.
Which feedback mechanism amplifies a physiological change rather than reversing it?
Answer: Positive feedback
Positive feedback amplifies the original stimulus, as seen in childbirth (oxytocin increases contractions) or blood clotting. Negative feedback mechanisms, in contrast, work to stabilize conditions by reversing changes.