Save
Upgrade to remove ads
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account. Your email address is only used to allow you to reset your password. See our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

SCI 221 Part II

QuestionAnswer
The mechanisms that produce and maintain the resting membrane potential do so by producing a... ...slight excess of positive ions on the outer surface of the plasma membrane.
The speed of a nerve impulse depends on the neuron’s resting potential. False
A neurologist is using a voltmeter to measure potential. The membrane potential of a neuron was recorded at +30 mV. This is what type of membrane potential? Conduction Polarized Resting Action Action
The sodium-potassium pump actively pumps three potassium ions out of the neuron and two sodium ions into the neuron. False
The magnitude of the action potential peaks when the sodium channels close. True
Which membrane receptor acts to directly change ion permeability when stimulated? Gated-channel receptor Ionotropic receptor G-protein-coupled receptors Metabotropic receptor Gated-channel receptor
Severe depression can be caused by a deficit in certain brain synapses of: acetylcholine. amines. amino acids. neuropeptides. amines.
Which of the following statements about amino acid neurotransmitters is incorrect? They are among the most common neurotransmitters in the central nervous system (CNS). They are all inhibitory neurotransmitters. Glycine is a widely distributed They are all inhibitory neurotransmitters.
Serotonin is an example of a(n): amino acid neurotransmitter. amine neurotransmitter. acetylcholine derivative. neuropeptide neurotransmitter. amine neurotransmitter.
Both sympathetic and parasympathetic divisions are tonically active, which means they have opposing effects. continually conduct impulses to autonomic effectors. continually conduct impulses to the brain. are hydrolyzed by the enzyme acet continually conduct impulses to autonomic effectors.
The most numerous cerebral tracts are the projection tracts. association tracts. commissural tracts. cerebral nuclei. association tracts.
Which of the following is NOT correct? The cell bodies of sympathetic preganglionic neurons are located in the lateral gray column of certain parts of the spinal cord. Sympathetic preganglionic axons pass along the dorsal root of certain spinal Sympathetic preganglionic axons pass along the dorsal root of certain spinal nerves.
The effect of sympathetic stimulation on the urinary bladder is relaxation. constriction. dilation. no effect. relaxation.
The set of coordinated commands that control the programmed muscle activity mediated by extrapyramidal pathways is called the extrapyramidal tract. pyramidal tract. motor tract. motor program. motor program.
A reflex consists of either a muscle contraction or a muscle stretch. muscle relaxation. glandular secretion. glandular excretion. glandular secretion.
Acetylcholine can stimulate _____ receptors. alpha beta nicotinic both alpha and beta nicotinic
Nerve impulses over the _____ nerve cause increased peristalsis and decreased heart rate. olfactory trigeminal vagus hypoglossal vagus
The cerebellum acts with the _____ to produce skilled movement. hypothalamus thalamus pons cerebrum cerebrum
If the ventral nerve root of a spinal nerve were destroyed, a person would lose _____ related to that pathway. sensory perception willed movement only reflex activity both reflex activity and sensation willed movement
Nerves that innervate the floor of the pelvic cavity and some of the surrounding areas are found in the _____ plexus. sacral cervical coccygeal lumbar coccygeal
Which hormone produced by the adrenal glands is responsible for mobilization of energy stores? Aldosterone ACTH Cortisol Epinephrine Cortisol
About the inner ear and to see the cochlea unroll, with the base at the back of the image and the apex at the front. Specific wavelengths of sound cause specific regions of the basilar membrane to vibrate, much like the keys of a piano produce sound at di the apex of the cochlea
Movement of hair cells in the organ of Corti against the _____ membrane can stimulate nerve impulse condition. tectorial basilar vestibular cochlear tectorial
Which is not true of the hormone somatostatin? It is produced by the delta cells of the pancreas. It inhibits the secretion of glucagon. It stimulates the secretion of insulin. Both B and C are not true of the hormone somatostatin. It stimulates the secretion of insulin.
After blood leaves the lungs and returns to the heart, it enters the right atrium. left atrium. right ventricle. left ventricle. left atrium.
The normal cardiac impulse that initiates mechanical contraction of the heart arises in the AV node. AV bundle. Purkinje fibers. SA node. SA node.
The vagus is said to act as a “brake” on the heart. This situation is called cardiac inhibition. coronary inhibition. vagal inhibition. autonomic inhibition. vagal inhibition.
Fluid that is clear, watery and contains protein molecules, salts, and other substances is called blood plasma intercellular fluid intracellular fluid lymphatic fluid intercellular fluid
Which of the following is a powerful poison that acts directly on any cell and quickly kills it? cytotoxin phagotoxin lymphotoxin granulotoxin lymphotoxin
Pyrogen molecules trigger the fever response by promoting the production of leukotrienes. prostaglandins. antibodies. cytokines. prostaglandins.
What variations exist in the body to temporarily store or carry oxygen? neuroglobin myoglobin fetal hemoglobin all of the above all of the above
Spirometry is used to measure all of the following EXCEPT: Expiratory Reserve Volume Tidal volume Inspiratory capacity Total lung capacity Total lung capacity
Which of the following is not a means of transporting oxygen in the blood? As oxyhemoglobin Combined with the bicarbonate ion (HCO3–) Dissolved in the plasma All of the above are used to transport oxygen in the blood. Combined with the bicarbonate ion (HCO3–)
The PCO2 in the atmosphere is: less than in the alveolar air. greater than in the alveolar air. equal to the alveolar air. greater than arterial blood. less than in the alveolar air.
Dalton law states that the partial pressure of a gas in a mixture of gases is _____ to the total pressure of the mixture. inversely related to the concentration of that gas in the mixture and directly related to the concentration of that gas in directly related to the concentration of that gas in the mixture and
Ciliated cells lining the respiratory tract: help move air into and out of the lungs. trap and phagocytize microorganisms. help move the mucus blanket toward the pharynx. do both B and C. help move the mucus blanket toward the pharynx.
Which of the following is not one of the openings that must be blocked when food moves from the pharynx into the esophagus? Oropharynx Nasopharynx Larynx Mouth Oropharynx
Created by: user-1991251
Popular Physiology sets

 

 



Voices

Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
Retries:
restart all cards