introduction

Question 1

what is homeostasis

Answer 1

when the internal remains constant despite a changing external environment

Question 2

what are the levels of organization from smallest to largest

Answer 2

chemical/molecular level - cell - tissue - organ - system - organism

Question 3

what is the difference between set point and normal range

Answer 3

nr: restricted set of values that is considered stable and healthy
sp: the value in which the normal range fluctuates around

Question 4

what’s the diff between neg and pos feedback

Answer 4

neg: corrects feedback
pos: amplifies feedback

Question 5

what is integration

Answer 5

processes, interprets and makes decision (interneurons of brain and spinal cord)

Question 6

describe the 3 terms that refer to flow of info

Answer 6

sensory/afferent: incoming/output
association or inter: processing
motor/efferent: out put

Question 7

path/arc

Answer 7

all info starts w a stimulus and ends with a response

Question 8

what are the parts of the path/arc

Answer 8

starts w stimulus
- receptor: detects/sense the stimulus
- afferent path: carries sensory info to control center
- control center: receives info, decides and sends command
- efferent path: carries command to effector
- effector: performs the response on gland or muscle

Question 9

membrane potential

Answer 9

unequal charge distribution across the cell membrane

Question 10

describe charges of inside and outside the cell

Answer 10

inside: -ve charge, high concentration of K+
outside: +ve charge, high concentration of Na+ and Cl-

Question 11

polarized

Answer 11

have a membrane potential or resting state (charge inside and out is different)

Question 12

depolarization

Answer 12

potential moves to threshold or becomes more positive –> less polar

Question 13

hyperpolarization

Answer 13

moves away from threshold or becomes more negative –> more polar

Question 14

repolarization

Answer 14

returns to resting rate