Human Anatomy and Physiology Practice Test 5

Get Latest Updates About Pharmacy Notes, Books and Many More

This Human Anatomy and Physiology Practice Test Contains 250 Questions but every time you will get 20 different Questions to answer

1 / 20

In the utricle, tip links in hair cells are involved in

perception of sound

movements of the basement membrane

regulation of distortion-activated ion channels.

formation of perilymph.

2 / 20

Which of the following is not a steroid?

Etiocholanolone

Relaxin

17?-hydroxyprogesterone

Pregnenolone

3 / 20

A ventrolateral cordotomy is performed that produces relief of pain in the right leg. It is effective because it interrupts the

left dorsal column

a direct projection to the primary somatosensory cortex.

right ventrolateral spinothalamic tract

left ventrolateral spinothalamic tract

4 / 20

In human males, testosterone is produced mainly by the

Leydig cells

seminiferous tubules

Sertoli cells.

epididymis

5 / 20

P450s (CYPs) are highly expressed in hepatocytes. In which of the following do they not play an important role?

Carcinogenesis

Steroid hormone formation

Detoxification of drugs

Glycogen synthesis

6 / 20

Transcription refers to

the process where DNA wraps around histones to form a nucleosome

the process of replication of DNA prior to cell division.

the process where a DNA sequence is copied into RNA for the purpose of gene expression

the process where an mRNA is used as a template for protein production

7 / 20

In complete heart block

ventricular fibrillation is common

fainting may occur because of prolonged periods during which the ventricles fail to contract

the atrial rate is lower than the ventricular rate

fainting may occur because the atria are unable to pump blood into the ventricles.

8 / 20

Which of the following are incorrectly paired?

A cells: glucagons

B cells: insulin

F cells: gastrin

D cells: somatostatin

9 / 20

. Maximum absorption of short-chain fatty acids produced by bacteria occurs in the

jejunum

stomach.

duodenum.

colon

10 / 20

Withdrawal reflexes are not

accompanied by the same response on both sides of the body

an example of a flexor reflex.

prolonged if the stimulus is strong

prepotent.

11 / 20

In an experiment, a scientist treats a group of mice with an antiserum that substantially depletes the number of circulating neutrophils. Compared with untreated control animals, the mice with reduced numbers of neutrophils were found to be significantly more susceptible to death induced by bacterial inoculation. The increased mortality can be ascribed to a relative deficit in which of the following?

Acquired immunity

Granulocyte/macrophage colony stimulating factor (GM-CSF)

Platelets

Oxidants

12 / 20

Which of the following statements is correct?

The loudness of a sound is directly correlated with the amplitude of a sound wave, and pitch is inversely correlated with the frequency of the sound wave.

The auditory ossicles function as a lever system to convert the resonant vibrations of the tympanic membrane into movements of the stapes against the endolymph-filled scala tympani.

High-pitched sounds generate waves that reach maximum height near the base of the cochlea; low-pitched sounds generate waves that peak near the apex.

Conduction of sound waves to the fluid of the inner ear via the tympanic membrane and the auditory ossicles is called bone conduction.

13 / 20

If a nasal biopsy were performed on the patient described in Question 2 while symptomatic, histologic examination of the tissue would most likely reveal degranulation of which of the following cell types?

Neutrophils

Dendritic cells

Monocytes

Mast cells

14 / 20

Postrotatory nystagmus is caused by continued movement of

endolymph toward the helicotrema.

perilymph over hair cells that have their processes embedded in the tectorial membrane

aqueous humor over the ciliary body in the eye

endolymph in the semicircular canals, with consequent bending of the cupula and stimulation of hair cells.

15 / 20

Which of the following are incorrectly paired?

Hepatic glycogenesis : Insulin

Gluconeogenesis : Cortisol

Free fatty acid mobilization : Dehydroepiandrosterone

Kaliuresis : Aldosterone

16 / 20

Which of the following normally has a slowly depolarizing "prepotential"?

Atrial muscle cells

Bundle of His

Sinoatrial node

Purkinje fibers

17 / 20

A young man presents with a blood pressure of 175/110 mm Hg. He is found to have a high circulating aldosterone but a low circulating cortisol. Glucocorticoid treatment lowers his circulating aldosterone and lowers his blood pressure to 140/85 mm Hg. He probably has an abnormal

21?-hydroxylase

17?-hydroxylase

cholesterol desmolase

aldosterone synthase

18 / 20

Which of the following physiologic processes is not correctly paired with a structure?

Negative feedback inhibition : Renshaw cell

Electrical transmission : gap junction

Synaptic vesicle docking and fusion : presynaptic nerve terminal

Endplate potential : muscarinic cholinergic receptor

19 / 20

A visual exam in an 80-year-old man shows he has a reduced ability to see objects in the upper and lower quadrants of the left visual fields of both eyes but some vision remains in the central regions of the visual field. The diagnosis is

lesion of the optic chiasm

heteronymous hemianopia with macular sparing.

central scotoma

homonymous hemianopia with macular sparing

20 / 20

The representational hemisphere is better than the categorical hemisphere at

language functions

understanding spoken words

understanding printed words

recognition of objects by their form.

Your score is

The average score is 0%

Pos.	Name	Score	Duration
There is no data yet