As we continue with our revision journey heading to the MCQ finals physiology the quiz below is the Exam prep 2 in the series of tests. Do you feel like you can tackle it? Why don’t you give it a try and be sure to come back for the third exam in the series? All the best as you keep See morerevising for your finals.
Alter the activity of an enzyme
Alter the rate of synthesis of an enzyme
Alter the permeability of cell membranes
All of the above are correct
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Are derived from cholesterol
Are lipid molecules
Are not water soluble
Include the sex hormones and corticosteroids
All of these describe steroid hormones.
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Are less sensitive in low light conditions
Provide colour vision
Provide greater visual acuity (sharpness of detail)
Are more responsive in the daylight
All of these correctly describe cones.
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Aldosterone and other mineralocorticoids
Sex steroids: weak androgens and some estrogens
Cortisol and other glucocorticoids
Adrenaline and some noradrenaline
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Is released from the sarcoplasmic reticulum.
Enters the cell due to the opening of voltage regulated Ca2+ channels.
Is actively transported into the cell.
Is released from mitochondria.
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Dense bodies anchor thin filaments.
Fibers lack I and A bands.
Intercalated discs contain gap junctions.
Fibers lack branches.
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2-3-1-5-7-6-4
3-2-5-1-6-7-4
5-3-1-2-6-7-4
3-2-1-5-7-6-4
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FSH
GH
ACTH
TSH
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GnRH and dopamine
TRH and CRH
GnRH and GHRH
Dopamine and somatostatin
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Merkel discs
Pacinian receptors
Free nerve endings
Ruffini's corpuscle
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Abducters
Adducters
Extensors
Flexors
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Involves substances bound to carrier proteins in the blood
Involves the secretion of a substance to act locally without entering the circulation
Involves secretion via ducts into the lumen of the gastrointestinal tract
Never occurs in a normal healthy organism
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Treppe
Recruitment of motor units
Multiple wave summation
Inhibition of acetylcholinesterase
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The H zone increases in size.
Ca2+ associates with tropomyosin.
Myosin heads interact with tropomyosin.
Thin filaments slide across thick filaments.
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Choroid
Cornea
Sclera
Retina
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Bind to membrane receptors.
Diffuse easily through the plasma membrane.
Act by activating cAMP.
Are inactivated by second messengers.
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LH and FSH
GH and ACTH
TSH and prolactin
Oxytocin and ADH
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Increased calcitonin secretion
Increased thyroid hormone production
Increased TSH production
Increased serum potassium levels
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The basilar membrane vibrates more intensely
Action potentials from hair cells are blocked
Sound wave amplitude decreases
Sound wave frequency decreases
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Binding to an intracellular carrier protein
Initiation of gene transcription
Dimerisation of receptors
Binding to a hormone response element
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Anterior pituitary to the hypothalamus.
Posterior pituitary to the hypothalamus.
Hypothalamus to the anterior pituitary.
Hypothalamus to the posterior pituitary.
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Z line
Titin
M line
Actin
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The terminal cisternae transmit the action potential to the sarcoplasmic reticulum.
Acetylcholine binds to nicotinic receptors to initiate muscle cell depolarization.
The process can be blocked by muscarinic antagonists.
Ca2+ is released from the transverse tubules to initiate contraction.
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Actin
Myosin
Tropomyosin
Troponin
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Movement of otoliths
Stretch
Substances in solution
Photons of light
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Bipolar neurons
Ganglion cells
Cones
Rods
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During isometric contractions muscles do not generate tension.
The strength of contraction is directly proportional to the stimulus intensity.
Tendons act as part of the series-elastic component of a muscle.
During muscle contraction the Z lines move closer together.
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Contain intercalated discs.
Contain A and I bands.
Are innervated by somatic nerves.
May contain gap junctions.
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Is secreted by the alpha cells of the pancreas
Promotes the entry of glucose and amino acids into tissue cells
Promotes the breakdown of glycogen (glycogenolysis) and fat (lipolysis)
Levels fall immediately after a meal is eaten
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Myopia.
Hyperopia.
Presbyopia.
Retinopia.
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Abduction
Elevation
Inversion
Flexion
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Maximal tension is generated when the thick and thin filaments slightly overlap.
Maximal tension is generated when the thick and thin filaments do not overlap.
Maximal tension is generated when the thick and thin filaments fully overlap.
The amount of overlap is unimportant in determining maximal tension.
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15 % of VO2max.
25% of VO2max.
50% of VO2max.
85% of VO2max.
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Concentric contraction.
Isometric contraction.
Eccentric contraction.
Isokinetic contraction.
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Semicircular canals
Ossicles
Saccule and utricle
Organ of Corti
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Muscle mitochondria number.
Glycogen depletion during exercise.
Number of type IIB fibers.
Lactate production per unit time.
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The activating hormone interacts with a receptor site on the plasma membrane
The activating hormone activates an enzyme, most often adenylate cyclase
Activated adenylate cyclase catalyses the transformation of AMP to cyclic AMP
Cyclic AMP causes the activation of protein kinase
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Z line
Titin
M line
Actin
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Incomplete tetanus
Complete tetanus
Treppe
Fatigue
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Decreased H+ concentration.
Increased glycogen.
Increased lactate formation.
All of the above.
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Exercising at 25% of VO2max.
Exercising at 50% of VO2max.
Exercising at 75% of VO2max.
Exercising at 100% of VO2max.
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