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Flashcards in lab midterm 1 Deck (25):
1

How to calculate heart rate

1/period (in beats/min) * 60`

2

simple diffusion

small non-polar molecules and some uncharged polar molecules

3

channels

ions (na, K, Cl) H2O and some small poalr molevules

4

Mediated transport

ions and some large uncharged polar molecules

5

what determines the rate of diffusion of uncharged polar molecules?

lipid solubility, or its ability to form hydrogen bonds with H20

6

penetrating solutes ex

urea, and glucose

7

how does urea cross the membrane?

in aquaporins

8

how does glucose cross the membrane?

through glucose transporters GLUT they use mediated diffusion

9

How can you tell if RBCs burst?

When hemolysis occurs cell fragments will settle to the mottom of the test tuve and the intracellular and extracellular solutions will be transparent

10

descriptive statistics

simple calculations meant to describe data such as average, mean, stdev and standard error

11

students t test

compares the mean of 2 populations to determine if the observed differences are signficnt meaning that the differences are due to real effectss not just chance differences

12

frequency

the number of cycles in a unit of time
=1/period
units are something per unit time

13

exteroreceptors

located on the surface of the body and respond to stimuli from the external environment such as temperature, touch and pain

14

interoreceptors

located in the internal organs and respond to fluctuartion in internal conditions

15

reflex arc

a mechanism consisting of a sensory receptor, a neural conducting pathway, and an effector which produces the ultimate response

16

autonomic

visceral, unconscious and involuntart

17

somatic

may be conscious and voluntary

includes movement of skeletal muscle

18

hyperactive reflex

occurs when an injury occurs in the spinal cord at a level higher than that of the reflex arc

19

electromyogram

EMG records the total electrical activity

20

vestibulo-ocular reflex

images are stabilized on the retina by rapid eye movement in the direction opposite to the direction of head movement

21

Nystagmus

slow movement of the eyes in the direction of rotation with a rapid jerky movement in the opposite direction

22

Romberg test

assesses neurological damage. tests the sense of balance

23

jendrassik's maneuver

an isometric contraction of the arm and shuolder muscles prior and during the reflex test

24

what does a plythsmograph measure?`

mechanical, not electrical

25

Heart Rate

T2-T1/60