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单选题 nullA male patient complains of physical weakness and fatigue. A blood test shows his hematocrit to be 30%. Which of the following diagnoses is the least likely to explain his symptoms
学科：默认课程
时间：2025-12-24 00:58:34
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题目1单选题
record of the electrical currents of the cerebral cortex is a/an(A. A. computed tomographB. electroencephalogramC. magnetic resonance imageD. positron-emission tomographE. functional magnetic resonance image
题目2单选题
The sensor in tubuloglomerular feedback is a group of cells called the( )A. macula densaB. glomerulusC. vasa rectaD. macula luteaE. juxtaglomerular cells
题目3单选题
The preload of the ventricular muscle refers to the ventricle's( )A. end-systolic volumeB. end-diastolic pressureC. isovolumetric contraction pressureD. isovolumetric relaxation pressureE. resistance during ejection
题目4单选题
Which of these describes secondary hypersecretion of hormone XA. A growing tumor secretes hormone Y, which stimulates the gland that secretes hormone XB. Cells of a growing tumor manufacture hormone X in unregulated fashionC. Negative feedback from a tumor that hypersecretes hormone Z inhibits the gland that secretes hormone XD. Hormone X is secreted by a growing tumor that is in the anterior pituitary glandE. Hormone X is secreted in unregulated fashion by a tumor growing in a tissue that does not normally secrete hormone X
题目5单选题
Water and NaCl reabsorbed from the loop of Henle directly re-enter what blood vesselsA. vasa rectaB. afferent arteriolesC. efferent arteriolesD. cortical peritubular capillariesE. collecting ducts
题目6单选题
An action potential in the motor end plate rapidly spreads to the interior regions of a muscle cell by means of theA. Z linesB. sarcoplasmic reticulumC. H zoneD. transverse tubulesE. pores in the plasma membrane
题目7单选题
During exercise, there is a decreased flow of blood toA. the brainB. the skinC. the abdominal organsD. the skeletal musclesE. the heart
题目8单选题
Where are receptors for the chemical senses locatedA. In the organ of Corti and sacculeB. In the cochlea and lateral geniculate nucleusC. In the skin and tendonsD. In the tongue and noseE. In the fovea and semicircular canals
题目9单选题
What is the primary inward ion current during the plateau phase of ventricular muscle cellsA. sodiumB. calciumC. nitrateD. chlorideE. potassium
题目10单选题
Ulcers areA. only in the gastric mucosaB. always caused by hypersecretion of gastric acidC. treated by interventions that inhibit acid secretionD. caused by removal of the gallbladderE. most common in the large intestine
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