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Physiology Week 7-13
| Question | Answer |
|---|---|
| Neurotransmitters are released in a synapse and bind to: | receptors on the postsynaptic neuron. |
| The first event to occur when an adequate stimulus is applied to a neuron is: | some of the sodium channels at the point of stimulation open. |
| A synaptic knob would be located on a(n): | axon |
| Damage to the _____ nerve could make the diaphragm unable to function. | phrenic |
| Nerve impulses over the _____ nerve cause increased peristalsis and decreased heart rate. | vagus |
| Which of the following is a description of the principle of autonomic antagonism as it relates to the autonomic nervous system? | If sympathetic impulses tend to stimulate an effector, parasympathetic impulses tend to inhibit it. |
| Which is(are) the neurotransmitter(s) in a somatic motor pathway? | Acetylcholine |
| The receptors responsible for sensing crude and persistent touch are the: | Ruffini corpuscles. |
| Which of the following is a function of glucagon? | Tends to increase blood glucose concentrations |
| The clear and potassium-rich fluid that fills the labyrinth is | endolymph |
| 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. |
| In the extrinsic pathway of stage 1 of the clotting mechanism, chemicals released from damaged tissues trigger the cascade of events that ultimately result in the formation of | prothrombin activator. |
| A glycoprotein hormone that is secreted to increase oxygen concentration in the tissues is | erythropoietin. |
| If damaged, which valve could allow blood to leak back into the right atrium? | Tricuspid |
| The presentation of an antigen by an antigen-presenting cell activates the T cell. The cell then divides repeatedly to form a clone of identical sensitized T cells that form | effector T cells and memory cells. |
| 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 ingestion and destruction of microorganisms or other small particles is called | phagocytosis |
| Dalton law states that the partial pressure of a gas in a mixture of gases is _____ to the total pressure of the mixture. | directly related to the concentration of that gas in the mixture and |
| When the pressure in the lung is greater than atmospheric pressure: | expiration occurs. |
| Internal respiration can be defined as: | the exchange of gases between the blood capillaries and the tissue cells. |
| The purpose of peristalsis is to: | propel food forward along the GI tract. |
| Which of the following is not true of enzymes? | They change chemically and are in the end products of the reaction. |
| The process of swallowing is known as: | deglutition. |
| Which of the following is not a function of the liver? | Secretion of insulin |
Created by:
kristynmcorrea
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