Exam (elaborations)
BIOL 253 Exam 1 Questions and Complete Solutions Graded A+
- Course
- Institution
BIOL 253 Exam 1 Questions and Complete Solutions Graded A+
[Show more]
Content preview
BIOL 253 Exam 1 Questions and Complete SolutionsGraded A+
Denning [Date] [Course title] Which of the following transport mechanisms may be utilized to move glucose across cell membranes? - Correct Ans: Secondary active transport and facilitated diffusion
Which of the following statements about the Na-K pump is(are) true? - Correct Ans: The location of the binding sites on the Na-K pump dictates the direction of solute movement.
Examples of active transport may include __________. - Correct Ans: the movement of Na+ ions out of cells and the movement of glucose molecules into intestinal epithelial cells
Which of the following statements about epithelial transport in the intestines is (are) true? - Correct Ans: The Na+/K+ ATPase is found only in the basolateral membrane of intestinal epithelial cells and the movement of Na+ ions across the apical membrane of intestinal epithelial cells is dependent on the electrochemical gradient created by the Na+/K+ ATPase.
Which of the following statements is false with regard to primary/secondary active transport? - Correct Ans: Substances will always move down their concentration gradient.
If a cell were to become depleted of its ATP, which type of membrane transport would be most directly and immediately affected? - Correct Ans: Primary active transport
Energy released by the hydrolysis of ATP is used to move K+ and Na+ across cell membranes. This process is called __________. - Correct Ans: primary active transport
Substances that are going to move against their concentration gradient (from low concentration to high concentration) will use which type(s) of membrane transport? - Correct Ans: Primary or secondary active
transport
In skeletal muscle, the sarcoplasmic reticulum stores a very high concentration of Ca++. When Ca++ is released into the cytosol of muscle to facilitate contraction, it needs to be removed and pumped back into the sarcoplasmic reticulum so that skeletal muscle can return to its relaxed state. The Ca++ is moved from cytosol and pumped back into the sarcoplasmic reticulum where its concentration is much higher. What type of membrane transport does this represent? - Correct Ans: Primary active transport
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller YourExamplug. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $13.49. You're not tied to anything after your purchase.
Can Stuvia be trusted?
4.6 stars on Google & Trustpilot (+1000 reviews)
75632 documents were sold in the last 30 days
Founded in 2010, the go-to place to buy study notes for 14 years now