What effect will low-oxygen conditions have on pulmonary arterioles?
a) Because there is a ventilation/perfusion mismatch, it can lead to increase in vasodilation in areas where there is low oxygen.
b) There will be an increase in vasoconstriction and cause pressures to increase.
c) There will be an increase in vasodilation to decrease blood pressure.
d) There will be an increase in vasoconstriction and cause pressures to decrease.
Answer: b) There will be an increase in vasoconstriction and cause pressures to increase.
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Answer the following statements true (T) or false (F)
1. Veins that drain the cerebral hemispheres are the internal cerebral veins. 2. The sigmoid sinus, which penetrates the jugular foramen, leaves the skull as the external jugular vein. 3. The cervical spinal cord and the posterior part of the skull are drained by the vertebral veins. 4. The temporal and maxillary veins drain into the internal jugular veins.
Which muscle tenses the scalp and moves the auricle of the ear?
A) frontal belly B) occipitofrontal muscle C) temporoparietalis D) orbicularis oculi
During low pH, hemoglobin's affinity for oxygen will increase.
a. true b. false
Which of the methods will you use in the lab to obtain cells to view on a microscope slide?
A) Scrape the inside of the cheek. B) Use a urine sample. C) Use a drop of saliva. D) Use a lancet to extract blood sample.