CE 4 Flashcards
In oxidative stress experiment, which gas is produced when homogenate and the
substrate of catalase enzyme are mixed? Choose the best option.
a. CO2
b. N2
c. H2
d. CO
e. O2
O2
Spectrophotometer directly measures.
a. The amount of the light that a substance absorbs
b. The wavelength of the visible light
c. The amount of a chemical in a material
d. The weight of a material
e. The wavelength of the invisible light
The amount of the light that a substance absorbs
The sequence of the main components of a UV/visible spectrophotometer is
a. Light source Monochromator > Detector -> Readout - > Detector
b. Light source -> Detector -> Sample cell = > Monochromator -> Readout
c. Light source - Sample cell - > Detector - > Monochromator _ > Readout
d. Light source -> Monochromator > Sample cell -> Detector -> Readout
e. Light source -> Readout - > Sample cell - > Detector -> Monochromator
Light source -> Monochromator > Sample cell -> Detector -> Readout
A solution (standard) with a known concentration of 40 mg/mL gave an absorbance
reading of 0.800 in a spectrophotometer. What is the concentration of a sample (unknown)
that records an absorbance of 0.500? (Lambert-Beer Law; A= a x b x C A:absorbance, a:
extinction coefficient, b: length path of the cuvvet, C: concentration)
a. 10 mg/mL
b. 25 mg/mI
c. 64 mg/mI
d. 16 mg/mL
e. 20 mg/mI
25 mg/mI
Find the false statement.
a. Absorbance of a colored solution is measured at the visible region.
b. Absorbance of an uncolored solution is measured at UV region
c. Path length of the light (the width of the cuvvet) is 1 cm.
d. Cuvettes may be cylindrical or rectangular in shape and may be constructed from
glass, silica (quartz) or plastic.
e. Plastic cuvettes can not be used for applications in the visible range
Plastic cuvettes can not be used for applications in the visible range
Which of the following is the substrate of catalase enzyme?
a. H20
b. H2
c. H202
d. OH
e. All of them
H202
Catalase is found in
a. Liver
b. Blood
c Bone marrow
d Kidney
e. All of them
All of them
. In oxidative stress experiment, in which of the following test tube, catalase enzyme is less
active than others?
Choose the best option.
a. Acidic solution added test tube (substrate+ HCI+homogenate)
b. Basic solution added test tube (substrate+ NaOH+homogenate)
c. Neutral solution added test tube (substrate+ H20+homogenate)
d. Seconds heated test tube (homogenate is heated during 40 seconds then substrate
is added into the test tube)
e. Ice test tube (homogenate is put on ice during 10 minutes then substrate is added
into the test tube)
Seconds heated test tube (homogenate is heated during 40 seconds then substrate
is added into the test tube)
Which one is not a sensory branch of cervical plexus?
a. Transverse cervical
b. Ansa cervicalis
c. Great auricular
d. Supraclavicular
e. Lesser occipital
Ansa cervicalis
Which region is NOT supplied by the branches from the subclavian artery?
a. Supraspinous fosça
b. Lateral aspect of the base of the neck
c. Breasts
d. Upper part of the thyroid gland
e. First and second posterior intercostal spaces
Breasts
Which one is NOT a superficial vein of the upper limb?
a. Cephalic vein
b. Dorsal venous network
c. Median cubital vein
d. Axillary vein
e. Basilic vein
Axillary vein
When there is a penetrating injury with a sharp, broad knife from right lateral border
sternum and in the 3rd intercostal space, which structure cannot be harmed?
a. Internal thoracic vein
b. Intercostal nerve
c. External intercostal membrane
d. Internal intercostal muscle
e. Subcostal muscle
Subcostal muscle
Which layer is the most internal covering of the abdominal wall?
a. Transversalis fascia
b. Camper’s fascia
c. Scarpa’s fascia
d. Posterior layer of the rectus sheath
e. Internal oblique aponeurosis
Transversalis fascia
Which one is not an attachment point for the biceps brachii muscle?
a. Coracoid process
b. Bicipital aponeurosis
c. Supraglenoid tubercle
d. Radial tuberosity
e. Middle epicondyle
Middle epicondyle
Nerve entrapment causes weakness of the muscles and pain, numbness, and tingling
sensations on the dermatome. A patient feels tingles in the palm of his hand and thumb,
index and middle fingers and hand muscles are weak compared to the other side. During
the physical examination, you find that flexion of the wrist and pronation of the forearm
movements are very weak. Which nerve is entrapped in this patient and what is the possible
location of the entrapment?
a. Median - Between the two heads of pronator teres
b. Musculocutaneous - Passage through the coracobrachialis
c. Median - In the carpal tunnel
d. Radial - Radial groove of the humerus
e. Ulnar - Posterior to the medial epicondyle
Median - In the carpal tunnel
Brachial plexus can be damaged during the childbirth if the shoulder of the baby stuck in
the vaginal canal. Which nerve is NOT affected if the medial cord of the brachial plexus gets
injured during a challenging labor?
a. Pectoral nerves
b. Axillary nerve
c. Ulnar nerve
d. Median nerve
e. Medial cutaneous nerve of the forearm
Axillary nerve
During a parotid gland surgery, the surgeon must identify and protect a cranial nerve.
What is this nerve?
a. Glossopharyngeal
b. Trigeminal
c. Vagus
d. Superficial temporal artery
e. Facial
Facial
When you are dissecting anterior part of the forearm you notice that 4 muscles share the
same origin tendon. Which one does NOT share this common tendon?
a. Pronator teres
b. Flexor carpi ulnaris
c. Palmaris longus
d. Flexor pollicis longus
e. Flexor carpi radialis
Flexor pollicis longus
You want to see the course of the vagus nerve on the cadaver. You start dissecting from
the anterior part of the neck. When you reach the vagus nerve, which structure remains
posterior to the region of interest and is still intact?
a Platysma
a. Sternocleidomastoid
b. Prevertebral fascia
c. Carotid sheath
d. Investing fascia
Prevertebral fascia
Which one is not innervated by the motor branch of the trigeminal nerve?
a. Medial pterrgoid
b. Masseter
c. Mylohyoid
d. Temporalis
e. Posterior belly of the digastric
Mylohyoid
Which statement is WRONG about the scalene muscles?
a. Subclavian vein is anterior to the anterior scalene muscle.
b. Subclavian artery is anterior to the middle scalene muscle.
c. Roots of the brachial plexus pass between anterior and middle scalene muscles.
d. Anterior and middle scalene elevate the 2nd rib.
e. Phrenic nerve runs on the anterior surface of the anterior scalene muscle.
d. 1st rib
Which artery gives a branch to supply the lower teeth?
a Facial
a. Maxillary
b. Superficial temporal
c. Lingual
d. Inferior thyroid
Maxillary
Which part does NOT belong to the anterior ramus of T5 spinal nerve?
a. Collateral branch
b. Anterior cutaneous branch
c. Lateral cutaneous branch
d. Posterior cutaneous branch
e. Intercostal nerve
Posterior cutaneous branch
Which statement is WRONG about vessels of the thoracic wall?
a. Lower intercostal veins on the left side empty into the accessory hemiazygos
b. Collateral branch of intercostal artery runs on the superior border of the rib
c. Both hemiazygos and accessory hemiazygos open into the azygos vein
d. Internal thoracic artery supplies anterior thoracic wall
e. Intercostal veins mainly drain into the azygos vein on the right side
Collateral branch of intercostal artery runs on the superior border of the rib