Feedback Frenzy: Keep Calm and Stay Balanced
What is the term for the body’s stable internal environment?
Homeostasis
What is the correct anatomical position of the body? (demonstrate)
Standing upright, feet shoulder-width apart, upper limbs at the sides, head and palms facing forward.
What is the smallest stable unit of matter?
Atom
What organelle is known as the “powerhouse” of the cell?
Mitochondria
What term describes the movement of molecules from an area of high concentration to low concentration, without energy input?
Diffusion
Which type of feedback loop returns the body to homeostasis after a disturbance?
Negative Feedback
How many levels of structural organization are there in the human body?
Six (chemical, cellular, tissue, organ, organ system, organism)
Which subatomic particle has a positive charge and is found in the nucleus?
Proton
Which organelle is responsible for protein synthesis and can be found on the rough endoplasmic reticulum?
Ribosomes
Which process involves water moving across a selectively permeable membrane?
Osmosis
In childbirth, what kind of feedback loop strengthens uterine contractions until delivery?
Positive Feedback
What term refers to a structure being closer to the point of origin of a limb?
Proximal
What type of bond involves the sharing of electrons between atoms?
Covalent Bond
What is the name of the organelle that modifies, sorts, and packages proteins for secretion?
Golgi Apparatus
What is the type of transport that requires ATP to move substances against their concentration gradient?
Active Transport
Name the three components of a feedback loop.
Receptor, Control Center, Effector Organ
What is the most complex level of structural organization in the body?
Organism
Which four elements make up 96.2% of the body’s mass?
Oxygen, Carbon, Hydrogen, Nitrogen
Which organelle contains digestive enzymes and breaks down waste materials within the cell?
Lysosome
Which membrane proteins help transport ions and small molecules across the cell membrane by binding and changing shape?
Carrier Proteins
What hormone is secreted when the body becomes dehydrated, leading to water reabsorption in the kidneys?
Anti-Diuretic Hormone (ADH)
Which plane divides the body into superior and inferior parts?
Transverse
Atoms that lose electrons from the outer energy level have more protons than electrons. If it has more protons than electrons, then it’s a positive ion or a _____
Cation
What is the fluid-filled part of the cell where the organelles are suspended?
Cytoplasm (more specifically, the cytosol)
What is the process by which cells engulf large particles or liquids by wrapping the membrane around them?
Endocytosis (Phagocytosis for solids, Pinocytosis for liquids)