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SCI221-05

Weeks 7-13

QuestionAnswer
Acetylcholine is in the same class of neurotransmitters as: serotonin. histamine. dopamine.
Which of the following is not one of the main chemical classes of neurotransmitters? Triglycerides
Which of the following antidepressants acts by blocking the action of monoamine oxidase (MAO)? Phenelzine
Which of the following is not used by the body as a neurotransmitter? Nitric oxide Acetylcholine Carbon monoxide
The brief period during which a local area of an axon's membrane resists re-stimulation is called the __________ period. refractor
The neurotransmitter(s) that inhibit(s) the conduction of pain impulses is(are): enkephalins.
Cerebrospinal fluid is formed by filtration of blood in the: choroid plexuses.
What is the difference between a somatic reflex and an autonomic reflex? A somatic reflex is caused by contraction of skeletal muscles, whereas an autonomic reflex consists of contraction of smooth or cardiac muscle or secretions of glands.
Norepinephrine is liberated at: most sympathetic postganglionic nerve endings.
Parasympathetic stimulation has no effect on any of the following areas except: sweat glands.
The cerebellum acts with the _____ to produce skilled movement. cerebrum
Dynamic equilibrium depends on the functioning of the crista ampullaris.
Which of the following is not true of a receptor potential? It follows the all-or-none law.
The sequence of auditory ossicles in the middle ear starting at the tympanic membrane and ending at the oval window is: malleus, incus, and stapes.
The major hormone produced by the corpus luteum is: progesterone.
Visceroceptors are located in which of the following? Internal organs
Which of the following vessels do not have the ability to constrict and dilate? capillaries
The mechanisms of which three hormones work together to regulate blood volume? aldosterone, ANH, and ADH
What is the functional significance of large areas of cardiac muscle being electrically coupled to form a single functional syncytium? Because they form a syncytium, muscle cells can pass an action potential along a large area of the heart wall, stimulating contraction in each muscle fiber of the syncytium.
Blood pressure is measured with the aid of an apparatus known as a(n) sphygmomanometer.
The heart begins beating in the fetus at about what stage of development? After about 4 weeks
Adaptive immunity, part of the body’s third line of defense, is orchestrated by two different classes of a type of white blood cell called the lymphocyte.
The functions of the lymph nodes are defense and hematopoiesis.
Which antibody is synthesized by immature B cells and then inserted into their plasma membranes? immunoglobulin M
Memory cells: become plasma cells when exposed to an antigen.
During their residence in the thymus, pre-T cells develop into _____, cells that proliferate as rapidly as any in the body. thymocytes
By the time the blood leaves the lung capillaries to return to the heart, what percentage of the blood’s hemoglobin has united with oxygen? 97%
Which of the following is not a regulated process associated with the functioning of the respiratory system? Control of cell metabolism rate
One hundred milliliters of arterial blood contains approximately what volume percent of oxygen? 20%
The approximate partial pressure of oxygen at standard atmospheric pressure is about _____ mm Hg. 160
About 98.5% of the oxygen carried by systemic arterial blood is attached to: hemoglobin.
Which of the processes of mechanical digestion involves the esophagus? Deglutition Peristalsis
Hydrolysis refers to: using water to split larger compounds into smaller ones.
The process of fat emulsification consists of: breaking fats into small droplets.
The sodium cotransport or coupled transport acts to transport sodium ions and glucose molecules _____ the GI lumen. passively out of
The purpose of peristalsis is to: propel food forward along the GI tract.
Created by: mecy1980
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