SBA 2014

Question 1

Cell division. No nuclear membrane, lined up at equatorial membrane. Which stage of mitosis?

Answer 1

Metaphase

Question 2

Which enzyme splits DNA strands apart?

Answer 2

Helicase

Question 3

Desmosomes and hemi-desmosomes which protein is present?

Answer 3

Cytokeratin

Question 4

What disaccharide is starch broken down into

Answer 4

Maltose

Question 5

Grandfather of index case has disease, then disease skips a generation and she is found to be a carrier. What is the likelihood of her unborn child suffering from the disease?

Answer 5

0%

Question 6

What are the products of once cycle of beta oxidation?

Answer 6

1x NADH, 1x FADH2, 1x Acetyl CoA, Acyl molecule (2x carbons shorter) that’s fed back into the cycle

Question 7

Right dominance. Left anterior descending ischaemic - which structures are likely to be affected?

Answer 7

Left atrium, left ventricle

Question 8

Tachycardia, narrow complex - which part of the heart is dysfunctional?

Answer 8

AVN - To have a narrow complex, the electrical signal must pass forward through the atrioventricular (AV) node - ie contrast with a broad QRS complex means that either the conducting system is not working (bundle branch block) or the electrical circuit is not involving the AV node correctly.

Question 9

Guy goes up the mountain and experiences symptoms. What is the first thing he should do?

Answer 9

Descend immediately (bitch)

Question 10

Expiratory Reserve Volume?

Answer 10

Forced exhale after normal breath out

Question 11

Guy sees cells under microscope, from a salivary gland. Many eosinophilic granules, with adipocytes interspersed. Which salivary gland is this?

Answer 11

Parotid

Question 12

What enzyme is present in saliva and what is its function?

Answer 12

alpha amylase → begins starch digestion

Question 13

In the urea cycle, cycle- when arginine is acted on by arginase which by-product is formed?

Answer 13

ornithine

Question 14

What is the formula for BMI

Answer 14

weight/height squared

Question 15

Which of the following is an example of insensible fluid loss?

• exhaling water vapour
• vomiting
• diarrhoea

Answer 15

exhaling water vapour

transdermal water loss is the other one - NOT sweating as contains solutes

Question 16

Where is leptin produced?

Answer 16

adipocytes

Question 17

What structures pass through the cavernous sinus?

Answer 17

Oculomotor nerve; internal carotid artery; trochlear nerve; ophthalmic branch of trigeminal (V1); mandibular branch of trigeminal (V2), abducens nerve

Question 18

Define a motor unit

Answer 18

An alpha motor neuron and all the motor units it innervates