77 Best USMLE Questions and Answers (Q&A) - ProProfs Discuss

What is the smallest active the functional unit (including conduction and air exchange) of the lung?

John Smith
Answered: Jan 22, 2025

A respiratory bronchiolar unit -the smallest functional unit of the lung is the respiratory bronchiolar unit, which contains a respiratory bronchiole and the alveoli associated with it. this unit...Read More

2 Answers

1076 views

Which fascia encloses the thyroid and is responsible for its movement while swallowing?

M. Klose, Content Writer
Answered: Jul 19, 2018

The answer to this is Pre-tracheal Fascia. This is located in the neck area and this envelops the thyroid gland is enveloped in this fascia. It is one of the compartments responsible for...Read More

3 Answers

896 views

What is meant by mammalian messenger RNAs?

W. Kaye, Ex-Marine
Answered: Oct 12, 2020

It is observed that the RNA that is sent is a single-stranded RNA molecule. It is responsible for the correspondence of a particular genetic sequence with genes. You can easily read it if it is...Read More

5 Answers

810 views

What did the lesion most likely involve?

L. Hawkes, Teacher
Answered: Feb 14, 2019

The correct answer to this question is Cranial nerve IV is used to look down and are in the medial position. The cranial nerve IV innervates the superior oblique muscle. If this cranial nerve is...Read More

2 Answers

808 views

What do you suspect as her physician?

John Smith
Answered: Jan 22, 2025

There are detectable levels of HCG in her serum and urine. The patient described in this question is probably pregnant. The delay in menstruation coupled with the presence of basophilic cel...Read More

1 Answer

634 views

Which proteolytic enzymes are activated by acid hydrolysis of the proenzyme form?

John Smith
Answered: Jan 22, 2025

Pepsin-pepsin is secreted in a proenzyme form in the stomach. unlike the majority of proenzymes, it is not activated by protease hydrolysis. instead, spontaneous acid hydrolysis at ph 2 or lower...Read More

1 Answer

600 views

What type of blood capillaries hellps Organs such as the brain and thymus to have a more effective blood barrier?

John Smith
Answered: Jan 22, 2025

Continuous type with few vesicles -the capillary endothelia in the brain and thymus are continuous, as is the basal lamina. the blood-thymus barrier provides the appropriate microenvironment for...Read More

1 Answer

567 views

Which techniques for purification of proteins can be made specifically for a given protein?

John Smith
Answered: Jan 22, 2025

Affinity chromatography-each of the techniques listed separates proteins from each other and from other biologic molecules based upon characteristics such as size, solubility, and charge. however,...Read More

2 Answers

525 views

Which places the developing heart in the presumptive thoracic region cranial to the septum transversum?

John Smith
Answered: Jan 22, 2025

Cranial folding -initially, the developing cranial portion of the neural tube lies dorsal and caudal to the oropharyngeal membrane. however, overgrowth of the forebrain causes it to extend past the...Read More

1 Answer

511 views

What is drug therapy in psychology?

John Smith
Answered: Jan 22, 2025

Ribavirin-the correct answer is c. ribavirin is an antiviral drug approved for the treatment of severe respiratory syncytialvirus infection, the most common cause of pneumonia and bronchiolitis in...Read More

2 Answers

453 views

What is the homologue of the vaginal artery in the male?

John Smith
Answered: Jan 22, 2025

Inferior vesical artery -all of the listed choices are branches of the internal iliac artery. the inferior vesical artery in the male supplies the seminal vesicle, prostate, fundus of the bladder,...Read More

1 Answer

452 views

Which hormone secretion does a mutation affecting the development of the diencephalon could interfere with?

John Smith
Answered: Jan 22, 2025

Oxytocin-the neurohypophysis (posterior pituitary) is derived from an evagination of diencephalic neurectoderm. this structure is responsible for releasing oxytocin and vasopressin to the general...Read More

1 Answer

450 views

What is muscle in human body?

John Smith
Answered: Jan 22, 2025

Omental bursa -the omental bursa (lesser sac) is the remnant of the right coelomic cavity, which, owing to rotation of the gut and differential growth of the liver, lies behind the stomach. a...Read More

1 Answer

449 views

What function does the collagenous protein serve in bone?

John Smith
Answered: Jan 22, 2025

Formation of the three-dimensional lattice of the matrix -type i collagen is responsible for the three-dimensional fiber structure of the matrix. it is synthesized by osteoblasts and accounts for 85...Read More

1 Answer

414 views

Which substance can prevent Synthesis and storage of norepinephrine?

John Smith
Answered: Jan 22, 2025

Reserpine -noradrenergic activity can be blocked by a number of mechanisms. reserpine, for example, prevents the synthesis and storage of norepinephrine in sympathetic nerve terminals. guanethidine...Read More

1 Answer

394 views

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