What is the hepatic flexure?
A. The boundary between the liver and the duodenum
B. A curve in the caudate lobe of the liver
C. The boundary between the transverse and descending colon
D. The boundary between the ascending and transverse colon
E. The curve in the diaphragm that accommodates the liver
D. The boundary between the ascending and transverse colon
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Of all the homeostatic mechanisms in the body, control of extracellular fluid is one of the most sensitive. Which of the following is not considered an extracellular fluid?
A)Cerebrospinal fluid B)Interstitial fluid C)Blood plasma D)Cytoplasm
All of the following are innervated by the facial nerve (N VII) except for the ________ muscle
A) risorius B) orbicularis oculi C) levator palpebrae superioris D) mentalis E) temporoparietalis
Once an SA nodal cell reaches threshold, the depolarization phase occurs during which
A. potassium comes in through fast voltage-gated channels. B. calcium comes in through fast voltage-gated channels. C. potassium moves out through fast voltage-gated channels. D. sodium moves out through slow voltage-gated channels. E. calcium moves out through slow voltage-gated channels.
The volume of blood ejected from each ventricle during a contraction is called the
a. end-diastolic volume. b. end-systolic volume. c. stroke volume. d. cardiac output. e. cardiac reserve.