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Alma Sandoval
Human Physiology
| Question | Answer |
|---|---|
| Dopamine, epinephrine, and norepinephrine are classified as: | catecholamines. |
| Which is true of a neuron with a resting potential? | The sodium pump has moved Na+ to the outside of the plasma membrane. |
| There are two types of synapses—the electrical synapse and the __________ synapse. | chemical |
| Which of the following statements about amino acid neurotransmitters is incorrect? | They are all inhibitory neurotransmitters. |
| Which is true of an action potential? | The outside of the plasma membrane is negatively charged, and the inside is positively charged. |
| A child was frightened by a large dog. The pupils of the child’s eyes became dilated, and the heart and respiratory rates increased. These symptoms were caused by stimulation of: | the sympathetic nervous system. |
| If the dorsal root ganglia of the spinal nerve were destroyed, a person would lose _____ related to that pathway. | sensory perception |
| 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. |
| The part of the brain that can directly influence or inhibit the release of hormones from the pituitary is the: | hypothalamus. |
| Which of the following is not a function of the hypothalamus? | Regulation of motor activity |
| Which is not true of the hormone somatostatin? | It stimulates the secretion of insulin. |
| Which of the following is not true of a receptor potential? | It follows the all-or-none law. |
| Clearness or sharpness of visual perception is known as: | visual acuity |
| The major hormone produced by the corpus luteum is: | progesterone. |
| One hundred milliliters of arterial blood contains approximately what volume percent of oxygen? | 20% |
| When the pressure in the lung is greater than atmospheric pressure: | expiration occurs. |
| The sodium cotransport or coupled transport acts to transport sodium ions and glucose molecules _____ the GI lumen. | passively out of |
| Which of the following is not one of the openings that must be blocked when food moves from the pharynx into the esophagus? | Oropharynx |
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almaos