Anatomy and physiology Flashcards
(506 cards)
The pressure in the systemic arteries during ventricular contraction is A. Diastolic blood pressure B. Osmotic pressure C. Systolic blood pressure D. Low pressure
C Diastolic blood pressure is present when the ventricles are relaxed and therefore is a lower pressure than systolic blood pressure
Where are striated muscles located? A. Stomach wall and uterus B. Urinary bladder and intestine C. Ciliary body of the eye D. Heart and skeletal muscles
D The stomach wall, uterus, urinary bladder, intestine, and ciliary body all have smooth muscles.
The difference between the systolic and diastolic pressures of the expanding and contracting arterial wall is the A. Pulse B. Osmotic pressure C. End-systolic volume D. Stroke volume
A A stronger palpation pulse is due to greater pulse pressure
Input from what system causes vasoconstriction during exercise and therefore an increase blood pressure? A. Sympathetic nervous system B. Parasympathetic nervous system C. Central nervous system D. Peripheral nervous system
A Exercise increases blood pressure because of vasoconstriction
Cardiac muscle is A. Nonstriated involuntary B. Striated involuntary C. Nonstriated voluntary D. Striated voluntary
B
In what order does the impulse for for depolarization travel through the heart?
A. AV node, SA node, bundle of His, Purkinje fibers
B. SA node, AV node, bundle of His, Purkinje fibers
C. SA node, AV node, Purkinje fibers, Purkinje fibers, bundle of His
D. AV node, SA node, Purkinje fibers
B
The wave on an electrocardiogram that is associated with the atrial wall depolarization is the
A. PR interval
B. T wave
C. P wave
D PR interval is the length of time for the impulse to travel through the AV node. T wave is ventricular repolarization, and the QRS complex is ventricular depolarization.
The SA node is located in the wall of which chamber? A. Left Atrium B. Left Ventricle C. Right Atrium D. Right Ventricle
C The SA node is the heart’s dominate pacemaker.
The muscular sphincter located between the stomach and the duodenum is the A. Pylores B. Cardia C. Chyme D. Rugae
A The cardia is the sphincter between the esophagus and stomach. Chyme is the digested stomach content that moves though the pylorus. Rugae are the long folds found in the stomach.
The type of cell responsible for the transmission of impulses through the nervous system is the A. Neuroglia B. Schwann C. Neuron D. Oligodendrocyte
C Neuroglia protect and support the nervous system. Schwann cells are specialized glial cells in the peripheral nerves. Oligodendrocytes are specialized glial cells in the brain and spinal cord.
What system is automatically composed of the brain and spinal cord? A. Central nervous system B. Peripheral nervous system C. Parasympathetic nervous system D. Sympathetic nervous system
A
Function that an animal does not have to consciously control, such as peristalsis in the intestine, are influenced by the A. Somatic nervous system B. Central nervous system C. Peripheral nervous system D. Autonomic nervous system
D
The cranial nerves and the spinal nerves are anatomically part of what system? A. Central nervous system B. Peripheral nervous system C. Parasympathetic nervous system D. Sympathetic nervous system
B
Sensory nerves are considered A. Efferent motor nerves B. Motor nerves C. Efferent nerves D. Afferent nerves
D Afferent nervous conduct impulses from sensory receptors to the central nervous system. Motor nerves are efferent nerves that send impulses to the skeletal muscles, organs, glands, and so forth from from the central nervous system.
An imbalance of what minerals can affect nerve function? A. Phosphores and magnesium B. Sodium and potassium C. Manganese and chromium D. Iron and zinc
B
When a stimulus is strong enough to cause complete depolarization, it has reached A. Threshold B. Repolarization C. Refractory period D. Action potential
A
What happens within the neuron that allows local anesthetics to be effective?
A. Potassium gates open
B. The charge within the cell becomes positive
C. The charge within the cell becomes negative
D. Sodium channels become blocked
D Molecules of the local anesthetic block the sodium channels so depolarization cannot occur, and the sensation of pain will not reach the brain.
B Smooth muscles are found in the walls of many soft organs. They can also be found in various structures of the eyes, blood vessels, and mall passageways in the lungs.
Smooth muscles can be found in the A. Heart B. Stomach C. Pelvic limb D. Diaphragm
Which muscle cells have single nuclei? A. Skeletal and cardiac B. Skeletal and smooth C. Smooth and cardiac D. Skeletal only
C Skeletal, muscle cells have multiple nuclei
Cattle and swine display what type what type of estrus? A. Polyestrous B. Seasonally estrous C. Diestrous D. Monorstous
A Cattle and swine continuously cycle
Dogs demonstraight what type of estrous cycle? A. Polyesteous B. Seasonally polyesteous C. Diestrous D. Monoesteous
C Dogs cycle twice a year; in the spring and in the fall
What spices is an induced ovulator? A. Bovine B. Equine C. Canine D. Feline
D Cats will remain in prolonged estrous if not bred
In what stage of the estrous cycle does the corpus luteum develop? A. Proestrous B. Eastous C. Metestrous D. Diestous
C The corpus luteum develops after ovulation.
The hormone produced by a developing overian follicle is A. Estrogen B. Progesterone C. Prolactin D. Oxytocin
The corpus luteum produces progesterone. Prolactin is produced by the anterior pituitary gland, and oxytocin by the posterior pituitary glad.