SfM Formative Flashcards
Energetically unfavourable reactions can only proceed because they :
Have negative free energy changes
The lipid membrane surrounding eukaryotic cells does not contain:
Ribosomes
The dissociation constant for water is:
1x10^-14 (mol/L)^2
Amino acid sequence is described as the —– structure?
Primary
An enzyme increases the rate of a spontaneous reaction by:
Decreasing activation energy.
Monomers of carbohydrates are linked together by:
Glycosidic Bonds
Catabolism of 1 mol of glucose to lactate generates how many moles of ATP?
2 NET
Ingesting alcohol reduces which one of the following intermediates, particularly in the liver?
NAD+
What is the name of the molecule that transports electrons between complexes III and IV of the electron transport chain?
Cytochrome C
ATPase utilises which one of the following mechanisms in order to generate ATP?
Binding- change mechanism
ATPase utilises which one of the following mechanisms in order to generate ATP?
Binding- change mechanism
Which one of the following vitamins is NOT derived from a lipid?
Vitamin C
Excess acetyl CoA from fatty acids gives rise to the formation of:
Ketones
Which amino acid is central to nitrogen entering the body?
Glutamate
Which one of the following cycles is important in nitrogen metabolism?
Glucose- Alanine cycles
If a person drinks one litre of water:
Approximately 1/3 will enter the extracellular fluid and 2/3 will enter the intracellular fluid.
Red blood cells will shrink if they are placed in a solution of:
30mM urea and 170mM NaCl
Which of the following statements regarding epithelia is NOT correct?
A simple epithelium is one which contains cells of only one type.
The permeability of the resting membrane potential is directly generated by:
The permeability of the resting membrane to K+
Which of the following is NOT an example of a graded potential?
Action potential.
The end-plate potential:
Is always large enough to evoke an action potential in the muscle.
The thick filaments of skeletal muscle are composed of:
Myosin
Contraction of skeletal muscle requires the:
Release of Ca 2+ from the sarcoplasmic reticulum.
An antagonist at a pharmalogical receptor will have:
A high affinity and low efficacy
In the sympathetic nervous system:
Spinal out flow is throaco-lumbar
Activation of the parasympathetic system causes:
An increase in gut motility
Which of the following drugs does NOT block transmission at the neuromuscular junction?
Neostigmine
The physiological significance of co-activation of alpha and gamma motor neurones innervating skeletal muscle is that it ensures:
The sensitivity of the muscle spindle is retained.
Golgi tendon organs are stimulated by:
Increased tension and cause relaxation of the muscle.
Viral infection would typically cause elevated levels of which blood cell type.
Lymphocytes
