Podcast
Questions and Answers
What is a distinguishing feature of smooth muscles compared to skeletal muscles?
What is a distinguishing feature of smooth muscles compared to skeletal muscles?
- Presence of troponin
- Responds only to excitatory stimulus
- Calcium source from extracellular fluid (correct)
- Highly developed sarcoplasmic reticulum
Where is actin bound in smooth muscles?
Where is actin bound in smooth muscles?
- Sarcomeres
- Z lines
- Dense bodies (correct)
- Myosin filaments
How are neurons connected to smooth muscles?
How are neurons connected to smooth muscles?
- Through neuromuscular junctions
- Not directly connected (correct)
- Via the bloodstream
- Direct physical connection
What type of nerves connect to smooth muscles?
What type of nerves connect to smooth muscles?
How do contractions of smooth muscles differ from skeletal muscles?
How do contractions of smooth muscles differ from skeletal muscles?
What neurotransmitters do autonomic nerves release?
What neurotransmitters do autonomic nerves release?
Which system is norepinephrine associated with?
Which system is norepinephrine associated with?
What two processes can smooth muscle, like the uterus, undergo?
What two processes can smooth muscle, like the uterus, undergo?
What are the two major types of smooth muscles?
What are the two major types of smooth muscles?
How do single unit smooth muscles contract?
How do single unit smooth muscles contract?
What is the primary action of alpha 2 receptors in the body?
What is the primary action of alpha 2 receptors in the body?
Which neurotransmitters do beta 2 receptors primarily respond to?
Which neurotransmitters do beta 2 receptors primarily respond to?
What is the difference between muscarinic and nicotinic receptors in terms of their response mechanism?
What is the difference between muscarinic and nicotinic receptors in terms of their response mechanism?
Where are beta 1 receptors primarily located in the body?
Where are beta 1 receptors primarily located in the body?
Which neurotransmitters equally stimulate alpha 1 receptors?
Which neurotransmitters equally stimulate alpha 1 receptors?
What is the mechanism that activates myosin ATPase during smooth muscle contraction?
What is the mechanism that activates myosin ATPase during smooth muscle contraction?
What is the significance of the latch bridge cycle in smooth muscle contraction?
What is the significance of the latch bridge cycle in smooth muscle contraction?
In adrenal innervation, which neurotransmitter is released from the presynaptic neuron?
In adrenal innervation, which neurotransmitter is released from the presynaptic neuron?
What is the main neurotransmitter released from the adrenal glands in adrenal innervation?
What is the main neurotransmitter released from the adrenal glands in adrenal innervation?
Where does sympathetic innervation release Acetylcholine (ACH) instead of Epinephrine (EP) and Norepinephrine (NE)?
Where does sympathetic innervation release Acetylcholine (ACH) instead of Epinephrine (EP) and Norepinephrine (NE)?
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