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Physiology stack 2
| Question | Answer |
|---|---|
| The neurotransmitter(s) that inhibit(s) the conduction of pain impulses is(are): | enkephalins |
| Stimulus-gated channels open in response to: | sensory stimuli. |
| Dopamine, epinephrine, and norepinephrine are classified as: | catecholamines |
| The active transport mechanism in the plasma membrane that transports sodium and potassium ions in opposite directions and at different rates is the | sodium-potassium pump |
| Neurotransmitters are released in a synapse and bind to: | receptors on the postsynaptic neuron |
| A term commonly used as a synonym for action potential is | nerve impulse |
| The type of cells that secrete ACTH are | corticotrophs |
| The major hormone produced by the corpus luteum is: | progesterone |
| In comparison with the nervous system, the regulatory effects of the endocrine system are: | slow to appear but long-lasting |
| One of the few hormones that functions on a positive-feedback loop is: | oxytocin |
| The receptors responsible for sensing crude and persistent touch are the: | Ruffini corpuscles |
| 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 chemoreceptors in the carotid bodies are particularly sensitive to: | hypercapnia |
| During pregnancy, what happens to the oxygenated blood returned from the placenta via the umbilical vein? | It flows into the inferior vena cava |
| 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. |
| Which of the following is a powerful poison that acts directly on any cell and quickly kills it? | lymphotoxin |
| Pyrogen molecules trigger the fever response by promoting the production of | prostaglandins |
| Which antibody is synthesized by immature B cells and then inserted into their plasma membranes? | immunoglobulin M |
| Which of the following combinations in arterial blood could cause an increase in the respiratory rate? | Increased PCO2, decreased arterial pressure, decreased pH, decreased PO2 |
| Which of the following is not a means of transporting oxygen in the blood? | Combined with the bicarbonate ion (HCO3–) |
| The PCO2 in alveolar air is _____ blood. | less than in the systemic venous and equal to the systemic arterial |
| External respiration can be defined as: | the exchange of gases between the lung and the blood capillaries in the lung and pulmonary ventilation. |
| During inspiration, the expansion of the lungs causes: | a decrease in alveolar pressure. |
| One hundred milliliters of arterial blood contains approximately what volume percent of oxygen? | 20% |
| When classified according to the kind of chemical reactions catalyzed, digestive enzymes are referred to as _____ enzymes. | hydrolyzing |
| The sodium cotransport or coupled transport acts to transport sodium ions and glucose molecules _____ the GI lumen. | passively out of |
| Which of the processes of mechanical digestion involves the esophagus? | Deglutition and Peristalsi |
| Hydrolysis refers to: | using water to split larger compounds into smaller ones |
| The hormone that inhibits gastric muscle, slowing passage of food into the duodenum, is called: | gastric inhibitory peptide |
| The hormone thought to be a messenger causing release of digestive enzymes from the intestinal mucosa is: | vasoactive intestinal peptide. |
Created by:
alima14