The pectoralis major and latissimus dorsi originate on the scapula.
Answer the following statement true (T) or false (F)
False
Rationale: See the subsection “Muscles That Move the Humerus” in the section “Muscles” and Table 9-2.
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true or false? Preparation for cell division occurs in the G2 phase.
a. true b. false
The building blocks for peptides are _______.
A) nucleic and amino acids B) amino acids C) maltose D) nucleic acids E) glucose
When a giraffe holds its neck in a vertical position, its brain is about 2 meters above its heart. Contraction of the ventricle must create enough pressure to raise the blood to the level of the head and perfuse the brain (i.e
, circulate blood through the brain). The arterial pressure at the aorta of a giraffe is approximately 200 mm Hg, twice that of a human. The brain of a sauropod dinosaur, such as Barosaurus, would have been about 9 meters above the level of its heart if it held its neck vertically. Calculate the aortic pressure required to perfuse the brain using the following information: • The density of blood is 1.055 g/cm3 and the density of mercury 13.554 g/cm3 • An aortic pressure of 10 mm Hg is needed to overcome resistance to blood flow in the carotid arteries leading from the heart to the brain. • A blood pressure of 50 mm Hg at the head is required to perfuse the brain. What inferences about the biology of sauropods can you draw from your calculation?
In an experiment, a researcher infuses a solution of conjugated bile acids into the portal vein of a rat such that their normal concentration is approximately doubled
He collects samples of hepatic bile from the rat before and after the infusion. Before the infusion, the concentrations of bile acids (BA), phosphatidylcholine (PC), and cholesterol (chol) are 30, 9, and 3 units per mL. What would be the predicted concentrations of PC and chol in the bile following the BA infusion? A. PC: 9; chol: 3 B. PC: 18; chol: 3 C. PC: 9; chol: 6 D. PC: 18; chol: 6 E. PC: 3; chol: 9