100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached 4.6 TrustPilot
logo-home
Exam (elaborations)

MCPHS Anatomy and Physiology Exam 3 with verified answers

Rating
-
Sold
1
Pages
16
Grade
A+
Uploaded on
24-04-2025
Written in
2024/2025

MCPHS Anatomy and Physiology Exam 3 with verified answers











Whoops! We can’t load your doc right now. Try again or contact support.

Document information

Uploaded on
April 24, 2025
Number of pages
16
Written in
2024/2025
Type
Exam (elaborations)
Contains
Questions & answers

Subjects

Content preview

MCPHS Anatomy and Physiology
Exam 3 with verified answers

Functions of the muscular system: - correct answer ✔Movement of the body
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Maintenance of posture |||||| ||||||




Respiration
Production of body heat |||||| |||||| ||||||




Communication
Constriction of organs and vessels |||||| |||||| |||||| ||||||




Contraction of heart |||||| ||||||




Three Es and a C: Properties of muscle tissue - correct answer ✔Contractility - ability of a
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




muscle to shorten with force
|||||| |||||| |||||| ||||||




Excitability - capacity of a muscle to respond to a stimulus |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Extensibility - muscle can stretch beyond normal resting length and be able to contract
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Elasticity - ability of muscle to recoil to original resting length after stretched
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




3 types of muscle - correct answer ✔Skeletal - voluntary
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Smooth - controlled involuntarily by endocrine and autonomic nervous system
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Cardiac - controlled involuntarily by endocrine and autonomic nervous system
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Epimysium - correct answer ✔CT that surrounds whole muscle |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Perimysium - correct answer ✔loose CT surrounding a group of muscle fibers; passage for
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




blood vessels and nerves
|||||| |||||| ||||||

,Endomysium - correct answer ✔loose CT separating individual muscle fibers within each |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




fasicle


Fiber anatomy - correct answer ✔Large, multinucleated
|||||| |||||| |||||| |||||| |||||| ||||||




1-4 mm avg length
|||||| |||||| ||||||




Have striated appearance
|||||| ||||||




Number of fibers is relatively constant after birth |||||| |||||| |||||| |||||| |||||| |||||| ||||||




- Get larger, but not more
|||||| |||||| |||||| |||||| ||||||




cardiac muscle - correct answer ✔Only in heart |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Striated
Each cell has 1 nucleus
|||||| |||||| |||||| ||||||




Intercalated disks and gap junctions |||||| |||||| |||||| ||||||




Autorhythmic
Action potentials of longer curation and refractory period
|||||| |||||| |||||| |||||| |||||| |||||| ||||||




Ca2+ regulated contraction
|||||| ||||||




smooth. muscle - correct answer ✔Not striated, small fibers |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Spindle-shaped, single, central nucleus |||||| |||||| ||||||




More actin than myosin, cross-bridging occurs
|||||| |||||| |||||| |||||| ||||||




Ca2+ required to initiate contraction
|||||| |||||| |||||| ||||||




Wavy


Sarcolemma - correct answer ✔plasma membrane, surround sarcoplasm (cytoplasm) |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Transverse tubules (T tubules) - correct answer ✔inward folds of sarcolemma; project into
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




interior of muscles |||||| ||||||

, Sarcoplasmic reticulum - correct answer ✔specialized smooth ER; store calcium |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




terminal cisternae - correct answer ✔Enlarged portion od SR adjacent to T tubules
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Myofibrils - correct answer ✔protein filament bundles; contain myofilaments that cause
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




contraction


Myofilament - correct answer ✔actin and myosin |||||| |||||| |||||| |||||| |||||| ||||||




Actin - correct answer ✔thin
|||||| |||||| |||||| ||||||




2 strands of F actin form double helix extending length of myofilament; composed of G
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




actin monomer that has active site, bind myosin during contraction
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Tropomyosin - elongated protein along the groove of F actin double helix - BLOCK binding |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




site G actin
|||||| ||||||




Troponin - 3 subunits: bind actin, binds tropomyosin, bind calcium ions|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Troponin/tropomyosin complex regulates interaction between active sites on G actin and |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




myosin


myosin - correct answer ✔thick |||||| |||||| |||||| |||||| ||||||




Shaped like golf clubs, consist of heave chains wound together to form rod portion lyin
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




parallel to myosin microfilament and 2 myosin heads that extend laterally
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Heads: can bind active sites on actin to form cross-bridge, attach to rod portion bt hinged
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




region that can bed during contraction, ATPase enzymes (break down ATP to release
|||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




energy)


sarcomeres - correct answer ✔basic functional unit of fiber - smallest part that can contract |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| |||||| ||||||




Sarcomeres give striated appearance |||||| |||||| ||||||

Get to know the seller

Seller avatar
Reputation scores are based on the amount of documents a seller has sold for a fee and the reviews they have received for those documents. There are three levels: Bronze, Silver and Gold. The better the reputation, the more your can rely on the quality of the sellers work.
Ruiz Liberty University
View profile
Follow You need to be logged in order to follow users or courses
Sold
81
Member since
1 year
Number of followers
1
Documents
11947
Last sold
2 days ago
Top-Quality Study Materials for Success – Ace Your Exams with Expert Resources!

Access high-quality study materials to help you excel in your exams. Get notes, summaries, and guides tailored to your courses!

3.2

9 reviews

5
3
4
1
3
2
2
1
1
2

Recently viewed by you

Why students choose Stuvia

Created by fellow students, verified by reviews

Quality you can trust: written by students who passed their tests and reviewed by others who've used these notes.

Didn't get what you expected? Choose another document

No worries! You can instantly pick a different document that better fits what you're looking for.

Pay as you like, start learning right away

No subscription, no commitments. Pay the way you're used to via credit card and download your PDF document instantly.

Student with book image

“Bought, downloaded, and aced it. It really can be that simple.”

Alisha Student

Frequently asked questions