Structural Hierarchy/requirements for life
A collection of similar tissues that performs a specific function is an ________.
Organ
Which of the following body regions corresponds to the term oculus?
Eye
Which of the following is the process through which humans maintain a stable internal environment despite changes in the external environment.
Homeostasis
Body temperature has no effect on the rate (speed) of chemical reactions within the body
False
What is the best description of for what pH measures?
Concentration of hydrogen ions in a solution
Why is atmospheric pressure important to human survival
Increases oxygen availability at high elevations
Keeps temperature within a habitable range
Which of the following organ systems has a major function of detecting and processing sensory information?
Nervous system
Which of the following is the best definition of a set point?
The ideal value (number) of a physiological variable (like the temperature on a thermostat)
A covalent bond is likely to be polar when ________.
one of the atoms sharing electrons is more electronegative than the other atom
Ty is three years old and as a result of a "stomach bug" has been vomiting for about 24 hours. His blood pH is 7.48. What does this mean?
Ty's blood is slightly alkaline.
What level of structural hierarchy would you expect to include the heart, blood vessels, and blood?
Organ system lvl
Physiology is the study of
how organisms function.
The activity of body systems must be coordinated for homeostasis
Yes or no?
Yes
Sodium chloride exists as a white crystal that dissolves in water to produce Na+ and Cl-. What type of bond exists between these two atoms?
Ionic bond
A solution with a pH of 5 has how many more protons in it than a solution with a pH of 7?
100 times
Where in the body do you expect to normally find interstitial fluid?
Between cells within tissues
The study of disease states in the body is called
pathophysiology
describes an ionic bond?
An electrostatic force of attraction between cations and anions due to opposite charges
Moving from a pH of 6 to a pH of 7 there is a 10x decrease in the concentration of hydrogen cations.
True or false
True
If the amount of sodium in the blood decreases, what would a negative feedback control mechanism be expected to do?
Increase the amount of sodium in the blood
The bonding of calcium, phosphorus, and other elements produces mineral crystals that are found in bone. This is an example of a(n) ________ reaction.
Synthesis
Positive feedback mechanisms in the body are less common than negative feedback mechanisms. What is the purpose of positive feedback?
To amplify the initial stimulus
Place the mixtures in order of most heterogenous (#1) to least heterogenous (#3)
Colloid
Solution
Suspension
1) suspension
2) colloid
3) solution
Explain acids
Lower than 7 on the pH scale
The strength is determined by how many cations are released
Considered proton donors
Ionize in water and release hydrogen cations