Smooth Muscle - Physiology | Biology+

Course

Other

Study Pack

Set 1: Principles of Cell Function

Set 2: Homeostasis of Body Fluids

Set 3: Signal Transduction, membrane Receptors, second Messengers, and Regulation of Gene Expression

Set 4: The Nervous System: Introduction to Cells and Systems

Set 5: Generation and Conduction of Action Potentials

Set 6: Synaptic Transmission

Set 7: The Somatosensory System

Set 8: The Special Senses

Set 9: Organization of Motor Function

Set 10: Higher Functions of the Nervous System

Set 11: The Autonomic Nervous System and Its Central Control

Set 12: Skeletal Muscle Physiology

Set 13: Cardiac Muscle

Set 14: Smooth Muscle

Set 15: Overview of Circulation

Set 16: Elements of Cardiac Function

Set 17: Properties of the Vasculature

Set 18: Regulation of the Heart and Vasculature

Set 19: Integrated Control of the Cardiovascular System

Set 20: Structure and Function of the Respiratory System

Set 21: Static Lung and Chest Wall Mechanics

Set 22: Dynamic Lung and Chest Wall Mechanics

Set 23: Ventilation

Set 24: Oxygen and Carbon Dioxide Transport

Set 25: Control of Respiration

Set 26: Non-Physiologic Functions of the Lung: Host Defense and Metabolism

Set 27: Functional Anatomy and General Principles of Regulation in the Gastrointestinal Tract

Set 28: The Cephalic, oral, and Esophageal Phases of the Integrated Response to a Meal

Set 29: The Gastric Phase of the Integrated Response to a Meal

Set 30: The Small Intestinal Phase of the Integrated Response to a Meal

Set 31: The Colonic Phase of the Integrated Response to a Meal

Set 32: Transport and Metabolic Functions of the Liver

Set 33: Elements of Renal Function

Set 34: Solute and Water Transport Along the Nephron: Tubular Function

Set 35: Control of Body Fluid Osmolality and Volume

Set 36: Potassium, calcium, and Phosphate Homeostasis

Set 37: Role of the Kidneys in the Regulation of Acid-Base Balance

Set 38: Introduction to the Endocrine System

Set 39: Hormonal Regulation of Energy Metabolism

Set 40: Hormonal Regulation of Calcium and Phosphate Metabolism

Set 41: The Hypothalamus and Pituitary Gland

Set 42: The Thyroid Gland

Set 43: The Adrenal Glands

Set 44: The Male and Female Reproductive Systems

Set 14 Smooth Muscle

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Set 14 Smooth Muscle

(Multiple Choice)

Free

An increase in smooth muscle tension can occur at a given intracellular [Ca⁺⁺] in response to:

A)Opening of K⁺ channels in the smooth muscle membrane.
B)Inhibition of myosin phosphatase by Rho kinase in the smooth muscle.
C)Cyclic adenosine monophosphate (cAMP)-dependent phosphorylation of myosin light-chain kinase in the smooth muscle.
D)Release of nitric oxide from adjacent endothelial cells.
E)Hyperpolarization of the smooth muscle membrane.

Answer

(Multiple Choice)

Free

Endogenous agonists such as adenosine and prostacyclin,as well as

\beta

₂-adrenergic receptor agonists,can elevate cAMP concentration in smooth muscle.The elevation of cAMP in the smooth muscle results in activation of cAMP-dependent signaling pathways in the smooth muscle.This activation typically:

A)Promotes relaxation,partly because of activation of myosin phosphatase.
B)Promotes contraction,partly because of activation of potassium channels.
C)Promotes relaxation,partly because of activation of Rho kinase.
D)Promotes contraction,partly because of inhibition of InsP3 production.
E)Promotes relaxation,partly because of inhibition potassium channels.

Answer

(Multiple Choice)

Free

A variety of stimuli can elevate cyclic guanosine monophosphate (cGMP)concentration in smooth muscle,which results in activation of cGMP-dependent signaling pathways in the smooth muscle.This activation typically:

A)Promotes relaxation,partly because of inhibition of myosin phosphatase.
B)Promotes contraction,partly because of decreased endothelin production.
C)Promotes relaxation,partly because of activation of potassium channels .
D)Promotes contraction,partly because of inhibition of InsP3 production.
E)Promotes relaxation,partly because of activation of voltage-gated Ca channels.

Answer