During defecation, we hold our breath, bear down, and strain. Explain the effects of holding one's breath on blood pressure
What will be an ideal response?
During the Valsalva maneuver, a subject bears down and tries to expire against a closed glottis (the airway in the larynx). We perform the Valsalva maneuver during coughing, sneezing, defecation, and heavy lifting. The Valsalva maneuver raises the pressure in the thoracic cavity and reduces the return of venous blood to the heart, which causes a drop in blood pressure. This should trigger the baroreceptor reflex and generate an increase in heart rate.
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The primary function of the lymphatic system is
A) the transport of hormones. B) circulation of nutrients and dissolved gases. C) defending the body against both external and internal threats. D) the production and distribution of plasma proteins. E) the production and maturation of leukocytes.
Inflammation of the fibrous connective tissue resulting in stiffness and soreness is
A. cramps. B. fibrositis. C. fibrosis. D. muscular dystrophy. E. paralysis.
What is the parasympathetic nerve supply to the SA and AV nodes?
a. vagus nerve b. trigeminal nerve c. accessory nerve d. cardiac nerve e. long thoracic nerve
Which of the following glands have both endocrine and exocrine functions?
What will be an ideal response?