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Physiology Part 2
weeks 7-13
Question | Answer |
---|---|
The part of the brain that can directly influence or inhibit the release of hormones from the pituitary is the: | hypothalamus |
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. |
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. |
Clearness or sharpness of visual perception is known as: | visual acuity |
Accommodation for near vision necessitates | an increase in the curvature of the lens. constriction of the pupils. convergence of the two eyes. |
All of the following are nonsteroid hormones except: | cortisol |
Neutrophils are highly mobile and phagocytic. They migrate out of blood vessels and into tissue spaces. This process is called | diapedesis. |
Which two factors promote the return of venous blood to the heart? | blood-pumping action of respirations and skeletal muscle contractions |
The localized pressure gradient needed to maintain blood flow in a tissue is called | perfusion pressure. |
The body’s defense mechanisms can be organized into one of two major categories of immune mechanisms; these are | innate and adaptive immunity. |
The ingestion and destruction of microorganisms or other small particles is called | phagocytosis. |
During their residence in the thymus, pre-T cells develop into _____, cells that proliferate as rapidly as any in the body. | thymocytes |
During inspiration, the expansion of the lungs causes: | a decrease in alveolar pressure. |
Which of the following would have the greatest accelerating effect on the dissociation of oxygen from hemoglobin? | Decreased PO2 and increased PCO2 |
Which of the following is not a regulated process associated with the functioning of the respiratory system? | Control of cell metabolism rate |
The hormone that stimulates the gallbladder to release bile is: | cholecystokinin. |
Which of the processes of mechanical digestion involves the esophagus? | Deglutition Peristalsis |
The major site for the absorption of the end products of digestion is the: | small intestine. |
Which of the following is not one of the main chemical classes of neurotransmitters? | Triglycerides |
No impulse can be sent through a neuron: | during the absolute refractory period. |
When an impulse reaches a synapse: | chemical transmitters are released. |