Lecture Exam 2 BIO 2050.pdf

4/28/24, 10:58 PM Lecture Exam 2 : 2024SP-BI0-2050-HY02 Human Anatomy & Physiology | Lecture Exam 2 e Due Mar 23 at 11:59pm Points 100 Questions 47 Available Mar 18 at 8am - Mar 23 at 11:59pm Time Limit None Instructions Use this link to access BIO 2050 Lecture Exam 2. This exam contains 46 questions, there is a mix of short answer, multiple choice, multiple select and matching. It is password protected and must be completed at the testing center on the Largo campus (Bladen Hall) This quiz was locked Mar 23 at 11:59pm. Attempt History Attempt Time Score LATEST Attempt 1 37 minutes 56 out of 100 Score for this quiz: 56 out of 100 Submitted Mar 19 at 1:02pm This attempt took 37 minutes. Question 1 0/2pts Elderly people are often intolerable to cold (they easily get cold). A possible explanation for this is thinning of the epidermis with age thinning of the dermis with age Correct Answer thinning of the hypodermis (subcutansous layer) with age You Answered Inactivity of the sweat glands with age Question 2 2 /2 pts Hyperparathyroidism (excessive secretion of PTH) can lead to strong but soft bones referred to as "rubber bones". What would be an appropriate explanation for soft but strong bones? https://pgcconline.instructure.com/courses/20137/quizzes/212150?module_item_id=2387009 1/16

4/28/24, 10:58 PM Lecture Exam 2 : 2024SP-BI0-2050-HY02 Human Anatomy & Physiology | Correct! Decalcification of bone Loss of collagen from bone Increased osteoblast activity Increased production of calcitonin Question 3 2 /2 pts In modern surgery, it is possible to lengthen a short leg bone, because new bone tissue can rapidly grow to fill a cavity. However, it would be important to administer a chemical to Kill all osteoblasts. Correct! leave the periosteum intact to provide nutrients and define the boundary for bone growth ensure the growth plates are all ossified. remove calcium from the diet. All of the above. Question 4 2/ 2pts With aging, the extracellular matrix of bone tissue decreases. This is possible if are more active than osteoblasts, osteoclasts Correct! osteoclasts, osteoblasts osteocytes, osteoclasts osteoclasts, osteocytes Question 5 2/2pts Which of the following bones is not a part of the axial skeleton? ribs sternum vertebrae Correct! scapula https://pgcconline.instructure.com/courses/20137/quizzes/212150?module_item_id=2387009 2/16

4/28/24, 10:58 PM Lecture Exam 2 : 2024SP-BI0-2050-HY02 Human Anatomy & Physiology | Question 6 0/2pts Release of PTH (parathyroid hormone) would result in which of the following? The stimulation of osteoclasts Increasing blood calcium levels Increased absorption of calcium from the diet Correct Answer All of the above You Answered Only A and B are true Question 7 0/2pts Inadequate levels of vitamin D can lead to which of the following? Correct Answer Increased levels of PTH You Answered Decreased levels of calcitonin Decreased PTH levels Increased testosterone levels Question 8 2 [ 2 pts Kidney disease can prevent the kidneys form reabsorbing calcium from the urine, causing the body to lose too much calcium. What affect would this have on bone? Loss of bone mass due to continual secretion of PTH Loss of bone mass but with no connection to PTH Loss of bone mass due to increased osteoclast activity Correct! Both a and ¢ would be possible effects. Question 9 2/2pts Modified sweat glands, called glands, secrete wax in the ear canal sebaceous https://pgcconline.instructure.com/courses/20137/quizzes/212150?module_item_id=2387009 3/16

4/28/24, 10:58 PM Lecture Exam 2 : 2024SP-BI0-2050-HY02 Human Anatomy & Physiology | eccrine apocrine Correct! ceruminous Question 10 2/ 2pts Which of the following layers of the epidermis is responsible for cell division and replacement? stratum corneum stratum granulosum Correct! stratum basale stratum lucidum Question 11 0/ 2 pts Which of the following layers of the skin relies on capillaries in the underlying connective tissue in the dermis for its nutrients? You Answered papillary layer stratum corneum dermis hypodermis Correct Answer stratum spinosum Question 12 2/2pts Melanin is a substance responsible for cell growth skin pigmentation protection from UV rays Correct! both b and c all of the above https://pgcconline.instructure.com/courses/20137/quizzes/212150?module_item_id=2387009 4/16

4/28/24, 10:58 PM Lecture Exam 2 : 2024SP-BI0-2050-HY02 Human Anatomy & Physiology | Question 13 0/2pts As you age there is an increased risk of skin cancer. This can be explained if there were You Answered a decreased number of melanocytes a decreased number of Langerhan’s cells a decreased number of keratinocytes Correct Answer both a and b would result in an increased risk of skin cancer Question 14 0/2pts The part of the hair below the surface of the skin is called the You Answered follicle Correct Answer root shaft base Question 15 0/2pts The strength of the dermis would mainly be due to the amount of blood vessels the distribution of elastic fibers Correct Answer the presence of collagen fibers You Answered the thickness of the layers Question 16 2 [ 2 pts https://pgcconline.instructure.com/courses/20137/quizzes/212150?module_item_id=2387009 5/16

4/28/24, 10:58 PM Lecture Exam 2 : 2024SP-BI0-2050-HY02 Human Anatomy & Physiology | The sebaceous glands are simple alveolar glands that secrete a substance known as sebum. The secretion of sebum is stimulated : by high temperatures when the air temperature drops Correct! by hormones, especially androgens as a protective coating when one is swimming Question 17 0/2pts When you go for your yearly flu shot, you receive the shot in your arm. Which of the following layers of the skin would be pierced by the needle first? Correct Answer stratum basale You Answered stratum lucidum reticular layer papillary layer Question 18 2 /2 pts As you age you are not able to regulate your body temperature as well as when you were younger. Which of the following would be a possible explanation of this fact? A decrease in elastic fibers in the skin Correct! A decrease in sweat gland activity A decrease in the number of functioning melanocytes A decrease in the amount of collagen fibers in the skin Question 19 2/2pts The general process of gaining a tan and then losing it over time is best explained by which of the following? Melanocytes form melanin in the dead top epidermis and the epidermis is soon washed off. https://pgcconline.instructure.com/courses/20137/quizzes/212150?module_item_id=2387009 6/16

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