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Lab
Quiz otc. 22
18
Physiology
Undergraduate 4
10/21/2009

Additional Physiology Flashcards

 


 

Cards

Term
Smooth Muscles are mainly found where:
Definition
In walls and hollow tube like organs
Term
Smooth muscles are:
Definition

1) Smaller than skeletal muscles

2)Their fibers don't extend the full length of the muscle

 

Term

Where are skeletal receptors located:

 

Where are smooth muscle receptors located:

Definition

Neuromuscular Junction

 

 

Across entire length of the muscle fiber

Term

In Skeletal Muscle Ca+ is stored:

 

In Smooth Muscle Ca+ is stored:

Definition

Sacroplasmic Reticulum

 

Extracelllar Fluid

Term

Streched smooth muscle can still develop:

 

 

Can relax when..

Definition

Tension (urinary bladder)

 

 

Streched

Term
Smooth muscle is slow and economical
Definition

1) Doesn't use as much ATP per unit/time

2)Crossbridges are latched together longer (Actin and Myosin)

Term
How is smooth muscle highly specialized to economically maintain tension for long periods of time without fatigue?
Definition
Can accomodate variation in contents volume with little change in muscle tension
Term

Smooth Muscle Contrations

Slow Waves

Definition

1) Spontaneous waves of electrical activity

2)Determines frequence, direction and velocity of rhythmic contrations

Term
Pacemakers
Definition

1) Spontaneously depolarize over time

2) Don't need to be innervated, nerve and hormanal activity can change the rate

Term
Gap Junctions
Definition

1) Channels that link cytoplasm of one cell to another

2)Low resistance for electrical Activity

3)Propogate Depolarizations betwn smooth muscle cells

Term

Slow waves don't always reach:

 

Added wave will reach threshold =

 

multiple Action Potentionals=

Definition

Threshold

 

Action Potentional

 

Stronger Contractions

Term

Parasympathetic N.S:

Increases?

Blocked by?

Main Neurotransmitter?

Definition

Gut motility(amount and strength of contraction)

Atrophine

Acetylcholine

Term

Sympathetic

What is main neurotransmitter?

Decreases?

Definition

Epinephrine

In strength and amount of contraction

Term

Single Unite Smooth Muscle

Can contract without:

Examples:

Exhibit:

Have?

Definition

Input, nervous involved activity

Blood Vessels around Intestines

Slow Waves

Have gap junctions

Term

Multi Unit Smooth Muscle

Nearly always..

Examples: Sphincter in urinary iris of th eye

No...

Definition

Under nervous control

Gap junctions

Term
Amplitude
Definition
HEIGHT
Term
RATE
Definition
1 peak to the next (hump to hump)
Term
Tone
Definition
Average Level
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