Laboratory Manual For Human Anatomy & Physiology
4th Edition
ISBN: 9781260159363
Author: Martin, Terry R., Prentice-craver, Cynthia
Publisher: McGraw-Hill Publishing Co.
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Textbook Question
Chapter 10, Problem 1PL
Which muscle tissue is under conscious control?
- skeletal
- smooth
- cardiac
- stomach
Expert Solution & Answer
Summary Introduction
Introduction :
There are three types of muscle tissues namely; skeletal, smooth and cardiac muscles. Muscle tissues are characterized by the presence of elongated cells called muscle fibers, that can contract to create bodily movements.
Answer to Problem 1PL
Correct answer :
The correct answer is option (a) Skeletal.
Explanation of Solution
Explanation/justification for the correct answer :
Option (a) Skeletal. Skeletal muscle cells are long, thread-like, multinucleated and striated with an organized pattern of contractile proteins. These muscles are usually attached to bones and have functions such as body movements, maintaining posture, heat production and providing protection. Skeletal muscles are under conscious control and are considered voluntary. So, the correct answer is option (a).
Explanation for incorrect answer :
Option (b) Smooth. Smooth muscle cells are not striated and are fusiform in shape with the nucleus located to its center. It is located in visceral organs; iris, blood vessels, and respiratory tubes and has functions such as the motion of visceral organs (peristalsis), controlling pupil size and blood flow. Smooth muscle is under involuntary control. So, this is an incorrect option.
Option (c) Cardiac. Cardiac muscle is located only in the heart wall and the cells are branched, striated and have a single nucleus. It is under involuntary control. So, this is an incorrect answer.
Option (d) Stomach. Smooth muscle forms the walls of hollow internal organs. The stomach is made with smooth muscle, which is under involuntary control and functions to pump blood. So, this is an incorrect answer.
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19. On the diagram below
a. Label the three pictures as: DNA; polypeptide; or RNA.
b. Label the arrows as: translation or transcription/RNA processing.
c. Add the following details to the diagram.
Promoter region
TATA box
Transcription start site
Transcription terminator
Intron (A,B,C,D)
Exons (1,2,3,4,5)
Splice sites
5' cap
5' UTR (untranslated region)
3' poly A tail
3' UTR (untranslated region)
Translational start (AUG)
Translational stop (UGA, UAG, or UAA)
N and C ends of polypeptide
0000
Match the letter labels in the figure below to the terms. Some letter
labels are not used.
MNNNNNNIN
M
C
B
A
M
D
F
E
H
K
G
8
The diagram below illustrates a quorum sensing pathway from Staphylococcus aureus. Please answer the following questions.
1. Autoinduction is part of the quorum sensing system. Which promoter (P2 or P3) is critical for autoinduction?
2)This staphylococcus aureus grows on human wounds, causing severe infections. You would like to start a clinical trial to treat these wound infections. Please describe:
a) What molecule do you recommend for the trial. Why?
b) Your trial requires that Staphylococcus aureus be isolated from the wound and submitted to genome sequencing before admittance. Why? What are you testing for?
3) If a mutation arises where the Promoter P3 is constitutively active, how would that influence sensitivity to AIP? Please explain your rationale.
4) This pathway is sensitive to bacterial cell density. Describe two separate mutation that would render the pathway active independent of cell density. Briefly explain your rationale.
Mutation 1
Mutation 2
Chapter 10 Solutions
Laboratory Manual For Human Anatomy & Physiology
Ch. 10 - Which muscle tissue is under conscious control?...Ch. 10 - Which of the following organs lacks smooth muscle?...Ch. 10 - Which muscle tissue lacks striations? cardiac...Ch. 10 - Which of the following conduct action potentials?...Ch. 10 - Muscles of facial expression are smooth muscles....Ch. 10 - Which muscle tissue is multinucleated? skeletal...Ch. 10 - Prob. 7PLCh. 10 - Both cardiac and skeletal muscle cells are under...Ch. 10 - Match the tissues in column A with the...Ch. 10 - The word fiber is used to describe a structure in...
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