BIO 261 William Rainey Harper College EXAM 1 || All Solved.
What is Physiology? correct answers The study of how the body works to maintain life
What is Pathophysiology? correct answers How physiological processes are altered in disease or
injury
What are the two main Body-Fluid Compartments? correct answers intracellular and
extracellular compartments separated by cell's outer membrane
In the Intracellular compartments... correct answers biochemistry is happening 24/7, all cells
have intracellular fluid inside their cell
What is the Extracellular Body-Fluid compartment composed of? correct answers blood plasma,
and interstitial fluid
What is homestasis? correct answers it is the maintenance of fairly constant internal conditions
- around physiological set points
- maintained by negative feedback loops
Homeostatic Set Point (average) correct answers the point our body tries to maintain with all the
various necessities our body calls for
How does our body try and maintain homeostasis? correct answers through the negative
feedback loop
What does the sensor of the Negative Feedback Loop do? correct answers a neuron that detects
deviation from set point
,What does the integrating center of the Negative Feedback Loop do? correct answers the nervous
system/brain that determines response
What does the effector of the Negative Feedback Loop do? correct answers a neuron or the
endocrine system produces response
What is our normal body temperature? correct answers 98.6F or 37C
Intrinsic Control Mechanisms correct answers local control mechanisms from within the cells or
tissues that help the body regain homeostasis
Extrinsic Control Mechanisms correct answers global or "systemic" mechanisms from outside
the cells or tissues that help the body regain homeostasis. Generally involves either the nervous
system or the endocrine system or both
What elements are life composed of? correct answers Hydrogen, Sodium, Magnesium, Calcium,
Potassium, Carbon, Nitrogen, Oxygen, Phosphorus, Sulfur, Chlorine
Covalent Bonds correct answers - Bonds created by sharing electrons with other atoms
in nonpolar covalent bonds electrons are shared equally
- ex (H2,N2,)2)
in nonpolar covalent bonds... correct answers electrons are shared equally
- ex (H2,N2,)2)
In polar covalent bonds... correct answers electrons are shared unequally
- pulled more toward one atom
have + and - poles
- oxygen, nitrogen, phosphorus have strong pull
, - ex H20
How are ions formed in a solution? correct answers it occurs when valence electrons are
transferred from one atom to another
What is a cation? correct answers positively charged ion (loses electrons)
What is an anion? correct answers negatively charged ion (gains electrons)
What are Ionic Bonds? correct answers - bond formed by attraction of + and - charges
- ionic bonds are WEAKER than polar covalent bonds
- dissociate when dissolved in H2O because H2O forms hydration spheres around ions
- ex. NaCl
What is a Hydrogen Bond? correct answers When hydrogen forms polar bonds with another
atom it takes on a slight + charge making it attracted to any nearby - charged atoms
- creates surface tension
What are Hydrophilic molecules? correct answers molecules that are soluble in water
- aka Lipophobic
- readily form hydration spheres
- polar molecules
- glucose and amino acids
What are Hydrophobic molecules? correct answers water fearing molecules that are nonpolar and
cannot form hydration spheres (Lipophillic)
Acids correct answers release protons (H+) in a solution
What is Physiology? correct answers The study of how the body works to maintain life
What is Pathophysiology? correct answers How physiological processes are altered in disease or
injury
What are the two main Body-Fluid Compartments? correct answers intracellular and
extracellular compartments separated by cell's outer membrane
In the Intracellular compartments... correct answers biochemistry is happening 24/7, all cells
have intracellular fluid inside their cell
What is the Extracellular Body-Fluid compartment composed of? correct answers blood plasma,
and interstitial fluid
What is homestasis? correct answers it is the maintenance of fairly constant internal conditions
- around physiological set points
- maintained by negative feedback loops
Homeostatic Set Point (average) correct answers the point our body tries to maintain with all the
various necessities our body calls for
How does our body try and maintain homeostasis? correct answers through the negative
feedback loop
What does the sensor of the Negative Feedback Loop do? correct answers a neuron that detects
deviation from set point
,What does the integrating center of the Negative Feedback Loop do? correct answers the nervous
system/brain that determines response
What does the effector of the Negative Feedback Loop do? correct answers a neuron or the
endocrine system produces response
What is our normal body temperature? correct answers 98.6F or 37C
Intrinsic Control Mechanisms correct answers local control mechanisms from within the cells or
tissues that help the body regain homeostasis
Extrinsic Control Mechanisms correct answers global or "systemic" mechanisms from outside
the cells or tissues that help the body regain homeostasis. Generally involves either the nervous
system or the endocrine system or both
What elements are life composed of? correct answers Hydrogen, Sodium, Magnesium, Calcium,
Potassium, Carbon, Nitrogen, Oxygen, Phosphorus, Sulfur, Chlorine
Covalent Bonds correct answers - Bonds created by sharing electrons with other atoms
in nonpolar covalent bonds electrons are shared equally
- ex (H2,N2,)2)
in nonpolar covalent bonds... correct answers electrons are shared equally
- ex (H2,N2,)2)
In polar covalent bonds... correct answers electrons are shared unequally
- pulled more toward one atom
have + and - poles
- oxygen, nitrogen, phosphorus have strong pull
, - ex H20
How are ions formed in a solution? correct answers it occurs when valence electrons are
transferred from one atom to another
What is a cation? correct answers positively charged ion (loses electrons)
What is an anion? correct answers negatively charged ion (gains electrons)
What are Ionic Bonds? correct answers - bond formed by attraction of + and - charges
- ionic bonds are WEAKER than polar covalent bonds
- dissociate when dissolved in H2O because H2O forms hydration spheres around ions
- ex. NaCl
What is a Hydrogen Bond? correct answers When hydrogen forms polar bonds with another
atom it takes on a slight + charge making it attracted to any nearby - charged atoms
- creates surface tension
What are Hydrophilic molecules? correct answers molecules that are soluble in water
- aka Lipophobic
- readily form hydration spheres
- polar molecules
- glucose and amino acids
What are Hydrophobic molecules? correct answers water fearing molecules that are nonpolar and
cannot form hydration spheres (Lipophillic)
Acids correct answers release protons (H+) in a solution
