lab midterm 1

Question 1

How to calculate heart rate

Answer 1

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

Question 2

simple diffusion

Answer 2

small non-polar molecules and some uncharged polar molecules

Question 3

channels

Answer 3

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

Question 4

Mediated transport

Answer 4

ions and some large uncharged polar molecules

Question 5

what determines the rate of diffusion of uncharged polar molecules?

Answer 5

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

Question 6

penetrating solutes ex

Answer 6

urea, and glucose

Question 7

how does urea cross the membrane?

Answer 7

in aquaporins

Question 8

how does glucose cross the membrane?

Answer 8

through glucose transporters GLUT they use mediated diffusion

Question 9

How can you tell if RBCs burst?

Answer 9

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

Question 10

descriptive statistics

Answer 10

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

Question 11

students t test

Answer 11

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

Question 12

frequency

Answer 12

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

Question 13

exteroreceptors

Answer 13

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

Question 14

interoreceptors

Answer 14

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

Question 15

reflex arc

Answer 15

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

Question 16

autonomic

Answer 16

visceral, unconscious and involuntart

Question 17

somatic

Answer 17

may be conscious and voluntary

includes movement of skeletal muscle

Question 18

hyperactive reflex

Answer 18

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

Question 19

electromyogram

Answer 19

EMG records the total electrical activity

Question 20

vestibulo-ocular reflex

Answer 20

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

Question 21

Nystagmus

Answer 21

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

Question 22

Romberg test

Answer 22

assesses neurological damage. tests the sense of balance

Question 23

jendrassik’s maneuver

Answer 23

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

Question 24

what does a plythsmograph measure?`

Answer 24

mechanical, not electrical

Question 25

Heart Rate

Answer 25

T2-T1/60