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Physiology Part 2

weeks 7-13

QuestionAnswer
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.
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