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Physiology
Weeks 7-13
| Question | Answer |
|---|---|
| The difference between sodium and potassium in the generation of action potential is that | Sodium causes depolarization of the cell membrane, and potassium, causes repolarization of the cell membrane |
| Which membrane receptors acts to directly change ion permeability when stimulated? | Gated-channel receptor |
| A synapse consists of | Synaptic knob. Synaptic cleft. The plasma membrane of a postsynaptic neuron |
| The _ consists of several structures that lie beneath the thalamus and form the floor of the third ventricle and the lower part of its lateral walls | hypothalamus |
| Another name for the parasympathetic nervous system is the __ nervous system | Craniosacral |
| The two main types of adrenergic receptors are | Alpha & beta |
| Axon terminals of autonomic neurons release either of two neurotransmitters | Norepinephrine and acetylcholine |
| Nerve impulses over the _ nerve cause increased peristalsis and decreased heart rate | Vagus |
| Propranolol is an example of a: | Beta blocker. Drug used to treat irregular heartbeats. Drug used to treat HTN |
| The olfactory tract carries impulses associated with: | Smell |
| The immediate effect of a steroid hormone of a cell is the: | Transcription of RNA |
| One of the few hormones that functions on a positive-feedback loop is: | Oxytocin |
| The last step in the nonsteroid hormone mechanism of action is: | Protein kinase activate other enzymes |
| All of the following are components critical to coagulation | Prothrombin Thrombin Fibrinogen Fibrin |
| The molecule that makes up 95% of the dry weight of each RBC and is responsible for the red pigment is | Hemoglobin |
| During pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein? | It flows into the inferior vena cava |
| Which two factors promote the return of venous blood to heart? | Blood pumping action of respirations Skeletal muscle contractions |
| The lymphatic organs produce | lymphocytes |
| 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 defense, is orchestrated by two different classes of a type of white blood cell called the | Lymphocyte |
| The movement of phagocytes from blood vessels to an inflammation site is called | Diapedesis |
| Which is the function of the spleen? | Tissue repair Hematopoiesis Red blood cell and platelet destruction Blood reservoir |
| Which structural feature facilitates oxygen diffusion from the alveolar air into the blood in lung capillaries? | The alveolar and capillary walls are both very thin. The alveolar and capillary surfaces are both extremely large. The lung capillaries accommodate a large amount of blood at one time. Each RBC comes close to alveolar air |
| The amount of oxygen that diffuses into blood each minute depends on which factor? | Oxygen pressure gradient between alveolar air and incoming pulmonary blood. Total function surface area of the respiratory membrane. Respiratory minute volume. Alveolar ventilation. |
| Carbon dioxide is carried in three forms in the blood. Ranking them from greatest to least amount carried, the sequence would be: | Bicarbonate ion, carbaminohemoglobin, and dissolved in plasma |
| The chemical process in which a compound unites with water and then splits into simpler compounds is called | Hydrolysis |
| The final step in lipid transport by the intestines is the formation of | Chylomicrons |
| CCK is an intestinal hormone that | Causes the pancreas to increase secretion of exocrine high in enzymatic content. Opposes the influence of gastrin on gastric parietal cells. Stimulates contraction of the gallbladder so that bile can pass into the duodenum. |
| The intestinal hormone cholecystokinin: | Causes the pancreas to increase exocrine secretions high in enzyme content. Opposes the influence of gastrin on gastric parietal cells. Stimulates the contraction of the gallbladder |
| The hormone the inhibits gastric muscle, slowing passage of food into the duodenum, is called: | Gastric inhibitory peptide |
Created by:
dcardenas
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