Sliding filament model - Study guides, Class notes & Summaries

BIO 201: Muscle Complete Solutions *A* b*A*nds d*A*rk regions *I* bands L*i*ghter regions *I* bands have what discs? coin shaped *Z* discs *Sarcomere* smallest functional unite muscle fiber 4 important muscle functions 1. produce movement 2. maintain posture & body position 3. stablize joints 4. generate heat when they contract 4 steps of muscle contraction 1. nerve stimulation 2. action potential 3. action potential reproduces 4. intracellula calcium level rise A triad...

Which sentence best describes the sliding filament model of muscle contraction? Select one: a. Actin and myosin filaments remain stationary. b. Actin and myosin myofilaments shorten. c. Sarcomeres and myofibrils contract. d. Sarcomeres and myofibrils lengthen. - ANSWER c. Sarcomeres and myofibrils contract. The shortening of sarcomeres is responsible for contraction, and thus myofibrils (sarcomeres joined end to end) also shorten

Cortisol is a stress hormone that is released at ______ rates during exercise. a. Unpredictable b. Decreasing c. Increasing d. Constant Correct Answer c. Increasing The T-Tubule System connects the _______ to the inside of the cell. a. Mitochondria b. Golgi Apparatus c. Plasma Membrane d. Cell Wall Correct Answer c. Plasma Membrane ATP is required for muscle contraction because the high-energy phosphate is used in the biochemical reactions that shorten the distance between Z-lines....

Straighterline Anatomy Final, Straighterline Anatomy & Physiology Exam What is the smallest level of organization in the body that contains the body's genetic information? a. chemical b. cellular c. tissue d. organism -Correct Answer-cellular The cellular level includes the nucleus, an organelle that contains the body's genetic information. Which is an example of a normally occurring positive-feedback mechanism? Select one: a. elevated blood pressure during exercise b. increase in ...

The smallest level of organization in the body that contains the body's genetic information - Answer-Cellular. The cellular level includes the nucleus, an organelle that contains the body's genetic information What is an example of a normally occurring positive feedback mechanism? - Answer-The stretching of the uterus near the end of pregnancy During DNA replication, how does each template strand eventually become two identical DNA molecules? - Answer-One strand forms continuously, the o...

Who gets harmed, who benefits in each type of interaction? - • Mutualism (prey and predatory benefit from interaction) • Consumption (one benefits and one is harmed by interaction. Includes: predation, parasitism, herbivory) • Competition (both are harmed by interaction - but one harmed more than the other) What is "facilitation" and how does it play out over time? - Facilitation: an interaction in which one species has a positive effect on the survival and reproduction of another ...

PNB Unit 3: Heart (Molecular) Exam 2024 2 similarities between skeletal and cardiac muscle cells -Answer-striated sarcomeres - sliding filament model how are the fibers of cardiac myocytes organized in the heart -Answer-fibers are arranged to wrap around the chambers so when contract, they squeeze the chambers of the heart and reduce their volume to create the pumping 3 features unique to cardiac muscle compared to skeletal -Answer-bifurcations anastomoses intercalated disks bifurcation...

A&P 1 Final Exam, Straighterline Anatomy and Physiology 1, Straighterline A&P 1 Cumulative Final Exam Questions And Answers (Updated And Verified) What is the smallest level of organization in the body that contains the body's genetic information? Select one: a. chemical b. cellular c. tissue d. organism - answerB. Cellular The cellular level includes the nucleus, an organelle that contains the body's genetic information. Which is an example of a normally occurring positive-feedbac...

A&P 1 Final Exam, Straighterline Anatomy and Physiology 1, Straighterline A&P 1 Cumulative Final Exam Questions With Fully Verified Answers What is the smallest level of organization in the body that contains the body's genetic information? Select one: a. chemical b. cellular c. tissue d. organism - answerB. Cellular The cellular level includes the nucleus, an organelle that contains the body's genetic information. Which is an example of a normally occurring positive-feedback mecha...

Straighterline Anatomy Final, Straighterline Anatomy & Physiology Exam 2024 What is the smallest level of organization in the body that contains the body's genetic information? a. chemical b. cellular c. tissue d. organism -Answer-cellular The cellular level includes the nucleus, an organelle that contains the body's genetic information. Which is an example of a normally occurring positive-feedback mechanism? Select one: a. elevated blood pressure during exercise b. increase in hea...