Week 5 - Core Flashcards
What shade is fluid on an ultrasound?
Black (anechoic)
Identify a reproductive hormone primarily associated with the male reproductive system
Testosterone, Inhibin, Dihydrotestosterone, Relaxin, Luteinising Hormone
During normal exhalation what produces the force that drives normal exhalation and is it an active or passive mechanism?
Elastic force, passive
The mutation in CFT (think cystic fibrosis) leads to a different amino acid. Why does this have consequences on the function of the protein?
The secondary structure is altered
Which part of the cytoskeleton is the main supporting structure of the shape of the nucleus?
Intermediate filament
The structure of proteins is determined by different chemical bonds. What type of amino acids form hydrogen bonds?
Hydrophilic amino acids
An action potential may be generated by the entry or exit of positively or negatively charged ions across the cell membrane. What happens immediately after the spike potential of the action potential?
The sodium channels become inactivated
What is the long bone of the leg called?
Femur
What describes the cause of the upslope of the action potential (depolarisation) ?
Sodium influx into the cell
During ventricular systole when the ventricles contract what happens to the valves?
The atrioventricular (AV) valves close and the semilunar valves open
What best defines the concept of an electrochemical equilibrium potential?
It is the potential at which there is no net movement of an ionic species across a membrane to which it is permeable
Example of a negative feedback loop?
An increase in heart rate in response to a decrease in arterial blood pH
Which movement is best described as decreasing the angle of a joint and only occurred from a midline structure like the cervical vertebrae?
Lateral Flexion
Which radiology modalities expose patients to ionising radiation?
X-ray, nuclear medicine, CT
A man has completed a long run and lost 1kg of body weight due to water loss. He drinks some water and feels less thirsty, although he knows he has not yet replaced the water he lost, what sort of control mechanism limits his thirst?
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