Assignment Task:

Part B- Short Answer Response
This component of the assessment task requires short answers to justify the responses from PART A, and will give you the opportunity to also identify the correct response. Each possible answer requires justification to explain whether it is correct or incorrect and why, rather than a single statement. It is also important that justifications are grounded in physiology, and the justification is not through the elimination of alternative options. The assessment MUST be submitted via Turnitin and should include your name, student ID and title of the report (Short Answer Online Assessment Task) in the upload information and within the document itself. Please use the template provided on the LMS to structure your answers. Submission should be maximum of 8 pages. Please refer to information on Turnitin and Academic Integrity that is available in the study guide.

Legend for WXYZ Questions: For each of the questions or incomplete statements, ONE or MORE of the suggested answers given is correct.
Answer: 
a. if only W, X, and Y are correct
b. if only W and Y are correct
c. if only X and Z are correct
d. if only Z is correct
e. if all are correct

Introduction to the Human Body 
1.  A chain of many simple sugars is a:
a) monosaccharide. 
b) polysaccharide. 
c) disaccharide. 
d) nucleic acid. 
e) fatty acid.

Cell Structure and Function
2. What is/are the major role(s) of the phospholipid bilayer?
A) is the source of ATP synthesis. 
B) the formation of a barrier that is selectively permeable to lipid-soluble molecules only. 
C) is the site of transcription and translation.
D) contains the genetic information required for cellular processes. 
E) the formation of a barrier that is selectively permeable to lipid-soluble molecules and to provide a framework for membrane proteins. 

Movement of Molecules
3. If a 25% sucrose solution is separated from a 15% sucrose solution by a membrane impermeable to sucrose, but permeable to water, in which direction will net movement of water occur?
A) From the 15% sucrose solution to the 25% sucrose solution only.
B) From the 25% sucrose solution to the 15% sucrose solution only.
C) There will be no net movement of water in this case.
D) From the 15% sucrose solution to the 25% sucrose solution and from the 25% sucrose solution to the 15% sucrose solution.
E) None of the answers are correct.

Nervous System
4. A neuron is exposed to a drug that causes the blockage of Na+ leak channels. How will this drug affect the resting membrane potential of the neuron? 
W. The resting membrane potential in this neuron would initially become more positive.
X. The resting membrane potential in this neuron would become around +60 mV.
Y. The resting membrane potential would return to normal following activity of the sodium-potassium pump.
Z. The resting membrane potential in this neuron would become more negative.

5. Graded potentials may:
W. initiate an action potential.
X. depolarize the membrane to the threshold voltage.
Y. hyperpolarize the membrane.
Z. be called EPSPs or IPSPs.

Homeostasis and Endocrine:
6. A higher than normal secretion of the thyroid hormones thyroxine (T4) and tri-iodothyronine (T3) would cause increases in:
W. basal metabolic rate.
X. thyrotropin-releasing hormone (TRH).
Y. basal rate of heat production.
Z. thyroid-stimulating hormone (TSH).

7. What is the primary mechanism for maintaining homeostasis?
A) positive feedback
B) negative feedback
C) intrinsic control
D) extrinsic control
E) homeostatic control

Reproductive System
8. Based on a 28-day cycle, which of the following occurs during days 6-14 of the menstrual cycle? Explain.
A) ovulation
B) menstruation
C) proliferative phase
D) secretory phase
E) luteal phase

9. Semen contains a number of factors which: 
W)  reduce sperm motility (movement).
X)  increase acidic environment of the female reproductive tract.
Y)  increase the viscosity of the female cervical mucous.
Z)  provides a swimming medium.


The Heart and Cardiovascular System
10. Which phase on an ECG is hidden by the QRS complex and explain why:
A) atrial depolarization.
B) atrial repolarization.
C) ventricular depolarization.
D) ventricular repolarization.
E) ventricular contraction.

11. Which of the following may result in an increase in mean arterial pressure (MAP) explain:
W) increased heart rate
X) decreased venous return.
Y) increased peripheral resistance.
Z) increased radius of systemic arterioles.

Respiratory System
12. The partial pressure of oxygen in arterial blood is approximate:
A) 40 mm Hg.
B) 45 mm Hg.
C) 100 mm Hg.
D) 105 mm Hg.
E) 159 mm Hg.

13. Which of the following statements is true of a leftward shift in the hemoglobin-oxygen dissociation curve? Explain.        
W) Affinity for oxygen is increased.
X) Oxygen loading onto the hemoglobin is increased.
Y) It can be caused by an increase in blood pH.
Z) It can be caused by an increase in PCO2.


Digestion and Metabolism
14. The gastric phase of gastric secretion is triggered by the:
A) entry of food into the stomach
B) sight, thought, or smell of food
C) entry of chyme into the small intestine
D) entry of chyme into the large intestine
E) release of cholecystokinin and secretin by the small intestine


15) The absorptive state of metabolism is characterized by the following?    
W. glycogen synthesis in the liver and muscle tissue    
X. glucagon release by the pancreatic beta cells     
Y. protein synthesis in muscle tissue    
Z. gluconeogenesis in the liver forms glycogen.  
 

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  • Posted on : February 13th, 2019

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