Lab Exam Q's

Question 1

What should negative control for starch contain

Answer 1

Water & reagent to detect starch (lugol’s iodine)

Question 2

Negative & positive control

Answer 2

negative; tests for absence of a substance

positive; tests for presence of a substance

Question 3

Negative/Positive control colour for protein

Answer 3

(-) = light blue
(+) = dark purple

Question 4

Negative/Positive control colour for lipids on paper towel

Answer 4

(-) = clear
(+) = “oily”

Question 5

Negative/Positive control colour for carbohydrates

Answer 5

(-) = yellow
(+) = black

Question 6

Negative/Positive control colour for Sugar

Answer 6

(-) = teal
(+) = orange

Question 7

Diffusion vs osmosis

Answer 7

diffusion = movement of molecules from high to low conc.

osmosis = movement of water across membrane from high to low conc.

Question 8

Can osmosis & diffusion occur at the same time if there is a semipermeable membrane

Answer 8

Yes

Question 9

Can active and passive transport can occur simultaneously

Answer 9

Yes

Question 10

Why can certain molecules diffuse through dialysis tubing and others cannot

Answer 10

Small molecules diffuse, large molecules cannot

Question 11

Connective tissue

Answer 11

• supports, connects & protects tissues & organs

Question 12

Adipose tissue

Answer 12

• under the skin (subcutaneous fat)
• insulations & protections

Question 13

dense fibrous tissue

Answer 13

• found in tendons & ligaments
• e.g. (sclera of the eye)
• strong & flexible

Question 14

Hyaline cartilage

Answer 14

• no blood vessels
• ends of long bones

Question 15

layers of frog insetting

Answer 15

• serosa
• longitudinal smooth muscle
• circular smooth muscle
  -connctive tissue
• columnar epithelial
• lumen
• vili

Question 16

longitudinal vs circular smooth muscle

Answer 16

• longitudinal = pushes contents along, contracts to shorten
• circular = squeezes contents forward, contracts to narrow

Question 17

Meninges

Answer 17

• protects & cushions brain
• “pad” layer

Question 18

diencephalon

Answer 18

thalamus = relay station for sensory info

hypothalamus = controls body homeostasis

Question 19

Brain stem

Answer 19

midbrain = vision, hearing, reflexes

pons = breaving & sleep

medulla oblongata = heart rate, blood pressure

Question 20

ventricles

Answer 20

• make and move CSF
• protects brain from injury

Question 21

cerebellum

Answer 21

• motor control

Question 22

cranial & spinal nerves

Answer 22

• PNS
• control head & neck

Question 23

Skin receptors

Answer 23

• pacinian corpuscles = pressure/vibrations (deep dermis)
• krause = cold/pressure (dermis)
• free nerve ending = pain/temp (epidermis/dermis)
• Ruffini endings = stretch (dermis)
• meissner’s = light touch (upper dermis)

Question 24

Which skin receptor is not encapsulated

Answer 24

free nerve

Question 25

responsible for blind spot

Answer 25

- optic. disc with no photoreceptors

Question 26

pupillary reflex

Answer 26

- bright light causes pupil to constrict

Question 27

focuses light rays on retina

Answer 27

lens

Question 28

rectus abdominis

Answer 28

origin = pubic symphysis insertion = ribs action = flexion of vertebral column & compression of abdomen

Question 28

visual pathway

Answer 28

optic nerve - optice chiasm - optic tract - thalamus

Question 29

erector spinae

Answer 29

origin = iliac crest insertion = vertebrae

Question 30

gluteus maximus

Answer 30

origin = ilium insertions = femur

Question 31

Tibialis anterior

Answer 31

origin = tibia insertions = metatarsals, tarsals movement = dorsiflexion, inversion of foot

Question 31

Sartorius muscle

Answer 31

origin = ilium insertions = tibia action = flexion of femur, abduction of femur, medial rotation of knee

Question 32

gluteus medius

Answer 32

origin = ilium insertions = femur

Question 33

Gastrocnemius

Answer 33

origin = femur insertions = tarsal action = plantar flexion

Question 34

iliopsoas

Answer 34

iliacus origin = ilium, sacrum insertion = femur psoas major origin = vertebrae insertions = femur

Question 35

gracilis

Answer 35

origin = pubis insertions = tibia

Question 36

rectus femoris

Answer 36

origin = ilium insertions = patella, tibia

Question 37

hamstring

Answer 37

origin = ischium insertions = fibula, tibia

Question 38

soleus

Answer 38

origin = tibia, fibula insertion = tarsal

Question 39

tibialis anterior

Answer 39

origin = tibia insertions = tarsal, metatarsals

Question 40

sternocleidomastoid

Answer 40

origin = clavicle insertion = temporal bone

Question 41

trapezius

Answer 41

moving pectoral girdle